Will Intel Ship an x86-64bit Chip This Year? 336
Solid Paradox writes "According to The Register, American Technology Research predicts an x86-64-bit processor will 'soon' arrive from Intel and in another story, they also predict that Sun and IBM will be the major players in the future 64-bit boom. Meanwhile the Inquirer has a somewhat related article entitled Senior Intel PR man talks 64-bit extension talk, which follows their Pentium V will launch with 64-bit Windows Elements article that says that the chip is to be sampled internally this month."
Pentium V (Score:5, Funny)
"The Pentium V is likely to fly along at between 5GHz to 7GHz, have 2MB plus of level two cache, be built on a 90 nanometer process, and have a stackable design." So, you'll have a 64-bit module sitting on top of your 32-bit CPU?
Sounds like Sega's 32X to me... except it'll play Doom 1 faster.
Re:Pentium V (Score:3, Informative)
Especially considering that to date the HUMONGOUS push by Intel to rev up dem CPUs hase done nothing more than prove beyond any shadow of unertainty that high-RPM engines do not necessarily give the best performance.
Anyone here old enough to remember the trend towards "turbo charged" engines not so long ago? How many of them are still around?
Re:Pentium V (Score:5, Informative)
Re:Pentium V (Score:3, Informative)
let me give you some basics:
an engine is an air pump. the more air you send through it in unit time, the more power it makes.
a great way to get more air into an engine is with forced induction. turbocharging is one route to acheive forced induction.
where are the turbo cars indeed ?
- subaru WRX
- lancer evo 8
- Audi RS6
- Dodge SRT-4
- Porsche 996TT
these are some of the fast
Re:Pentium V (Score:2, Informative)
Re:Pentium V (Score:2, Offtopic)
Re:Pentium V (Score:5, Interesting)
I've been speculating (here and elsewhere) that this stackable thing is not going to be Intel's next big thing. I believe that the stacked module will simply contain NVRAM and not a 64-bit coprocessor. Why NVRAM? Well, it opens up some interesting possibilities. For example, if you had enough NVRAM on-chip (or reasonably close in terms of latentcy and bandwidth), you could simply shut down portions of the processor on-the-fly to save power. You could also stick the entire operating system on the stuff. The possibilities are amazing. If you haven't looked already, see my journal [slashdot.org] for much information on the subject as it relates to Intel.
Of recent interest are some [intel.com] presentations [intel.com] by Intel on NVRAM. Of interest is that they've announced that they've found that OUM will take them beyond transistors in one presentation while another presentation actually shows a transistorless cell that is quite simple (two electrodes and a programming material sandwiched in between).
A transistorless storage device could be the piece that stacks onto the P5.
Re:Pentium V (Score:2)
I remember in the early 90s the crud you could buy to turn your 486/33 into a 486/66 DX2 processor. Even then these products were not wildly popular, and at that time it was significantl
Re:Pentium V (Score:2)
Re:Pentium V (Score:2)
But... (Score:3, Interesting)
Plus, who is ready to receive 64 bit chips? Windows isn't quite yet there with their 64 bit OS, and many linux distros only have beta quality 64 bit OS'es.
NeoThermic
Re:But... (Score:4, Insightful)
Just to nitpick, Linux has supported other 64-bit architectures (at least Alpha) from its early years, so it definitely has the 64-bitness sorted out already. X86-64 is a relatively new thing, but not quite the first one with 64 bits.
Re:But... (Score:2)
Who cares? You will be able to buy a 32bit machine for quite some time for your "legacy" apps.
Plus, who is ready to receive 64 bit chips?
Hmm, 64bit chips have been around for 10 years or so. Ask someone who works with real hardware this question.
Windows isn't quite yet there with their 64 bit OS, and many linux distros only have beta quality 64 bit OS'es.
a) this is slashdot, windows doesn't matter b) although my experience with 64bit linux distros is limited, Deb
Re:But... (Score:2, Insightful)
a) With the exception of the black magicians of the embedded systems, people people do not, in general, have to write bit-banging assembler code. Who cares if x86 is shite - and no-one's disputing that here - if the compiler/interpreter hides them nassty, nassty bitses.
b) It is imperative that the legacy code runs fast or that it can be easily recompiled. Y
The IA may be shitty... (Score:2)
The IA is the IA. It has little to do with how anything else works (which is all modern at this point). The only pain is having non-fixed length opcodes, but we've solved that problem (TLBs) so we get to use instruction cache better. I don't really see the problem!
Windows XP 64-bit (Score:5, Insightful)
Re:Windows XP 64-bit (Score:5, Interesting)
These kinds of rumours may not not have anything to do with reality, but at least they can explain why Microsoft has not released the x86-64 Windows for sale even though there have been fully functional betas available for almost a year now.
Re:Windows XP 64-bit (Score:2)
Re:Windows XP 64-bit (Score:2)
Re:Windows XP 64-bit (Score:2)
Even if it were out, I think the problem is getting people to invest into the platform, be it large and small time developers. In short, the platform needs a "killer app" to make it a worthwhile transition for most people.
Re:Windows XP 64-bit (Score:3, Interesting)
It's great that MS is delaying though. All the companies that make 3d modelling and rendering software and haven't already switched to Linux are doing so now. Ditto companies making scientific analysis software and other com
Why would you buy an AMD64? (Score:2)
Let's just review a few facts:
Re:Why would you buy an AMD64? (Score:4, Insightful)
Lets.
Many dual-cpu boards tie all the memory to one cpu, slowing down the other one.
There are a few boards like that, but certainly not a majority. The difference is very small however, considering that there is just one extra hop across a HT link to the processor with memory. (The memory controllers are directly connected to HT links which minimises latency)
Various versions of the AMD64 architecture are unreasonably expensive.
True, some versions are expensive, but your talking about a technology that's been released for approximately 3 months now. Give it time and prices on the high end stuff will go down. That said, you can get a single proc A64 system for fairly cheap.
I've heard rumors of Linux incompatibility with various boards and bioses.
Rumors...you're giving people advice on whether or not people should purchase a particular architechture on rumors? What's the severity of the problems?
AMD is also in the act of outsourcing it's IT staff to India. While Intel undoubtedly does the same, AMD's action is more recent and this sort of thing shouldn't be rewarded.
I agree
AMD's planning with Microsoft Win64 release was also obviously lackluster if Intel was able to delay it.
That's a whole ton of speculation. There's any number of reasons that release was delayed. MS could be having trouble porting the legacy code over, Intel could have negociated(sp?) hard(keep in mind who has the much larger market share), MS could have wanted to wait for marketing reasons...who knows? It's silly to blame AMD for it though.
My 2 cents.
Dumb question (Score:3, Interesting)
Ok, flame me if you wish, here's my dumb question:
If I got a computer with a 64 bit processor, what difference would I notice compared to a non-64 bit resaonbly high-end PC? I mean, would it just be a bit faster? Or a hell of a lot faster? Or just faster at certain things? Or would it not make much difference at all for normal everyday office tasks and playing games etc.?
Re:Dumb question (Score:2, Informative)
Re:Dumb question (Score:2)
Running most anything but windows (everyone can probably remember "32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor written by a 2 bit company that can't stand 1 bit of competition.")
The real question is what the 64 bit $BLANK tacked on to the front would be.
Linux: it just works on 64-bit.
Windows: please emulate a 32-bit (or lower) processor*
*I have used NT 4 on alpha (pretty much just acted like it was
Dumb Answer (Score:2, Funny)
Re:Dumb question - deserves a straight answer (Score:5, Informative)
For you and I, JimBob and JoeBlow, a good fast 32-bit system will kick much 64-bit arse. At least until
Re:Dumb question - deserves a straight answer (Score:4, Informative)
This isn't valid. x86-64 systems can run 32-bit apps at full speed, so they'd be kicking their own arse.
Also note that x86-64 corrects some of the weaknesses of the x86 architecture, so x86-64 apps are automatically faster. Counter-strike was 30% faster, clock-for-clock.
Re:Dumb question - deserves a straight answer (Score:3, Interesting)
That's an important point that people need to keep in mind. The 64-bitness in itself provides just about zero benefit to 99.9% of users.
Many people fail to realize that 64-bit in this context only means 64-bit pointers. Apps have been using 64-bit data for years: 80-bit floating point has been implemented in the X86 since the 1980s, and a
Small point! (Score:2)
Re:Dumb question - deserves a straight answer (Score:2)
Chip H.
Re:Dumb question (Score:2)
Re:Dumb question (Score:2, Informative)
WTF???
Yes, you heard right... slower.
More bits per instruction means
And that's without even beginning to go into mega details of advanced CPU design.
Repeat after me 64-bits does not magically change anything.
The reasons these chips will most likely run apps faster
you are so wrong (Score:2, Informative)
Even if you run just 32bit applications under 64bit Linux kernels on the Opteron, your 32bit applications magically get almost the full 4G address space to themselves, because the 64bit kernel can relocate itself out of the user's address space. That alone is enough justification for a 64bit x86 for many server applications.
The reasons these chips will most likely run apps faster is due to
Yes, and you know what those changes are there for? T
Re:you are so wrong (Score:2)
No, you're hosed when you use pointers, as you mention. Which is a LOT, no matter what language or programming style you use. (Not sure how
Re:Dumb question (Score:2)
Wrong! When someone says "a 64-bit chip" they mean the number of bits used to specify a memory location (ie., the size of a pointer). They are not talking about the size of the instructions!
The main benefit is not wider arithmetic operations or higher performance. The main benefit is more addressable memory. Since the amount of memory in a machine has been doubling every year or two,
Correction 32 vs. 64-bit fetch.. (Score:2)
Now they've extended that all the way to pointers and integers (and thus more ADDR lines for 64 (well 48-bit addressing), but that's a different story)
Re:Dumb question (Score:5, Insightful)
Not actually true. The larger the word size, the more bits you have to move on every operation. Going to a larger word size is normally driven by application requirements: if an application doesn't need a larger address space or a wider ALU a larger word can actualy make it slower.
What can you do with a 64-bit processor?
Well, one thing you can do is directly address every byte on the largest disk drives we can get today. With an operating system that was designed for direct access, like Multics, you would never have to "read" any files: when you opened one, it would look just as if it had already been read in... all your physical memory would effectively be a big disk cache.
For another, you can give each computer on the network part of the address space, so the same thing would be true for any file on your local LAN. Or any program on your LAN... no more messing around with protocols and remote file servers and databases... if you had the access rights, it would be as if they were local files.
You could do the same thing for each instance of a program, so you wouldn't need complex mapping code when passing messages from one program to another... in fact you could just pass the address of a message and let the memory management system move it over when you actually need it. That would get rid of a LOT of redundant copying, since you probably don't need all parts of every message.
The problem is, you'd need a whole new OS (or a whole old one... Multics is older than UNIX) to really take advantage of this kind of thing.
Re:Dumb question (Score:2)
There was some show-stopping problem with the way HURD [gnu.org] addressed discs which meant they could only support pathetically small discs. This was going to force a major rewrite and I have never heard anything of the project since.
Would this new architecture fix that problem? (possibly not, it may have been something along the lines of large discs needing a large memory footprint - something x86-64 would help with but would be too wasteful to be used)
Re:Dumb question (Score:3, Informative)
Re:Dumb question (Score:2)
A 32-bit system can access 4GB of memory without kludges. Are you implying that every byte on a disc partition has to map to a byte im memory? I can't believe that is what you are saying and it would mean that you will always need more memory than disc-capacity.
That would be the mother of all design-errors.
Re:Dumb question (Score:2)
Virtual memory addresses don't necessarily correspond to phyisical memory addresses.
Re:Dumb question (Score:2)
I dunno how Windows or Multics handle it, but on the UNIX side you can use mmap for that. It's slightly less elegant than an all-memory way of doin
Re:Dumb question (Score:3, Informative)
Re:Dumb question (Score:2, Insightful)
I don't think anyone needs more speed than the best 32 bit CPUs provide today. The bigger problem today is bugs. Memory leaks, security flaws, memory protection errors, you name them. If I understand him correctly, Linus Torvals has weighed in to say that 64 bit architecture will allow a new way of addressing devices: 1:1 mapping. This will eliminate a huge amount of pag
Re:Dumb question (Score:2)
You are very wrong. I'd like to do RF digital signal processing on my PC. Current CPUs are hopelessly underpowered for many of the DSP applications that would be useful to me.
Re:Dumb question (Score:2, Informative)
My main point (which you appear to have overlooked in your zeal to shoot me down) is that the 64 bit architecture offers something else other
Re:Dumb question (Score:4, Informative)
Some examples, some of which have already been pointed out:
1) video editing. Digital video takes up tons of space, and 2GB of memory addressability just doesn't cut it when you're trying to edit something that takes tens of gigs or more.
2) large-number computation. Scientific simulations, video rendering, etc. do tons of computation, and doing it 64 bits at a time will improve performance greatly.
3) games. The way games operate isn't too different than the rendering that Hollywood studios do in massive quantities, and games need to do it in real-time.
4) computation using large data sets. Simulators of all kinds (used for designing semiconductors, aircraft, automobiles, etc.) work with massive amounts of data. 2GB of memory addressability isn't enough.
Whether you think "most people" need 64 bits or not is irrelevant. I really don't care about the masses of AOL users who just read their email; in my line of work, 64 bit systems will soon probide a very noticable benefit as the simulators we're currently using are pushing the limits of 32-bit memory addressability and will soon need more. Given that there's thousands of engineers here in my company alone, and untold hundreds of thousands more involved in other types of simulation, is alone enough of a market opportunity for these CPU manufacturers to be pushing this technology. As for the home users, I'm sure the game writers will come up with ways to use that power too.
Re:Dumb question (Score:3, Informative)
A better question would be to ask specifically about x86-64 vs i386, instead of 64-bit vs 32-bit.
In general, comparing 64-bit processors to 32-bit processors is like comparing apples to oranges. Each side is going to be able to find situations where it is faster.
But if you ask about x86-64 compared to i386, then it gets a bit easier. x86-64 is better and faster, at nearly everything. The 386 is finally dead (or at least seriously threatened), thanks to A
Other things up their sleeve (Score:5, Informative)
Sample Results.. (Score:3, Funny)
After Sampling the new Chip Internally the general view was
"Tastes like Chicken"
Further Internal Samplings are being conducted using Tabasco and BBQ sauces.
Battle? (Score:2, Interesting)
x86-64??? (Score:5, Interesting)
Do you mean AMD64? Will the Intel chips really be fully compatible with an AMD-designed instruction set?
If this happens, it will only reinforce the fact that Intel has lost it's leadership position in the x86 compatible market. It will also severely impact any eventual large scale adoption of Itanium.
AMD just needs to bite the bullet and actually do some marketing. It has clearly superior products at this point. The Athlon 64 3000+ looks like a great buy, and a nice way to check out 64 bit computing at a low price point. If you have the money laying around, though, you really can't beat the PowerMac G5s. :-)
BTW, it's also too bad that Microsoft has delayed 64-bit Windows. It shows all too clearly that the "Wintel" partnership is alive, well, and smelly. On the other hand, it does provide a nice platform for Linux to tout it's superiority - "What's taking so long Microsoft, we've had an AMD64 version of Linux for months already!". So much for the "advantages" of Microsoft's software development practices... :-P
Re:x86-64??? (Score:2)
Re:x86-64??? (Score:3, Insightful)
What?
Leadership is determined by who's got more out there, not by who's following whose standard. By your definition, AMD could never ever achieve leadership position because it's usinng Intel's instructions.
AMD may be a threat, but it has not ousted Intel, not by a long shot.
Re:x86-64??? (Score:5, Interesting)
No, leadership is determined by who introduces the technology that everyone will be using in the future.
You're talking about "marketshare" which is a different concept. ;-)
The fact that Intel has such a commanding lead in marketshare at the moment is mainly a glowing endorsement of effective marketing practices. The P4 has been a stunning failure as a technology - all it has really achieved is lower performance at 1/3 higher clockspeed (P4 3.2 GHz. vs. Athlon FX 2.2 GHz.). The only place that P4 excels is the SIMD instruction set, where latency doesn't matter - and those instructions don't help much at all with general purpose computing.
Intel Inside - Just Say No. :-)
Re:x86-64??? (Score:3, Insightful)
No, the term "leadership" by itself is commonly understood to refer to "technical leadership", i.e., who sets the standard, not who moves more product. If there is any ambiguity, just be clear about it. In this case, from context, it should be clear that the term was used to talk about technical leadership.
By your definition, AMD could never ever achieve leadership position because it's usinng Intel's instructi
Re:x86-64??? (Score:2)
A marketing offensive under these circumstances would be counterproductive - they would be spending money creating a need for product they could not shift in those quantities. AMD have been there before and it hurt them.
As for Linux and x86-64 support, the German C't magazine tested this recently and had some pretty major problems with some MotherBoards.
One of the changes between the last 2.6.0-test and official 2.6.0
I don't doubt it at all... (Score:3, Interesting)
Internal use only (Score:3, Funny)
Perhaps I'm up too late, but when I read the above, this image of a windows developer flashed in my mind. He's frustrated with a child-proof cap and resorts to reading the side of this bottle from Intel: "For marketing use only. Do note mix with alcohol or windows. New buffer exploits are inevitable. May cause loss of market share if ingested."
Linus' opinion on 64 bit desktops (Score:5, Informative)
Linus Torvalds on 64bit desktops [realworldtech.com]
Linus Torvalds on 64bit desktops [realworldtech.com]
just what we need (Score:4, Insightful)
Re:just what we need (Score:2, Funny)
And this month we will (finally) see how well AmigaOS has been able to do the same thing.
Did I Miss Something? (Score:5, Insightful)
Isn't IBM already a major player [apple.com]?
Only when Mac OS X goes 64-bit. (Score:2)
Apple is pretty much dipping their toe in the pond at this point. Sun has been immersed for some time.
twas a noble idea by intel (Score:2)
anyway, they screwed the pooch, but will never correct the mistake. when you've got a few billion dollars, you can wait just long enough to lose
Re:twas a noble idea by intel (Score:2)
He could not understand what Intel were up to either.
Linus made a similar point later around the time he left Transmeta and added the rider that the Itanium was based on bad design decisions, irrespective of compatability.
NO (Score:2, Interesting)
Intel likes to keep its architectures separated. They have Pentiums/Xeons for 32bit and Itaniums for 6bit processing. Releasing a x86-64 CPU will kill the Itanium plain and simple.
Re:NO (Score:4, Funny)
I always thought Intel was a few slices short of a loaf, but that's just ridiculous.
Re:NO (Score:3, Funny)
Too Much Work (Score:4, Funny)
Think about it, optimizing an operating system for 4+ archs is no easy task and I doubt MS could do it in a reasonable amount of time.
Maybe they'll hire the Duke Nukem: Forever developers on that one.
Re:Too Much Work (Score:2, Informative)
Re:Too Much Work (Score:2)
Thats why linux, solaris, the BSDs suck. For example:
mlap:~/src/linux-2.6.0-test9/arch% ls -1
alpha/
arm/
arm26/
cris/
h8300/
i386/
i
m68k/
m68knommu/
mips/
parisc/
ppc/
ppc
s390/
sh/
sparc/
sparc64/
um/
v850/
x86
Will AMD's x86-64 and Intel's x86-64 (Score:2, Interesting)
Re:Will AMD's x86-64 and Intel's x86-64 (Score:3, Interesting)
Re:Will AMD's x86-64 and Intel's x86-64 (Score:2)
Re:Will AMD's x86-64 and Intel's x86-64 (Score:3, Informative)
Intel doesn't have to license anything from AMD to implement x86-64; Intel already has permission to use it without per-chip royalties because of previous cross-licensing agreements. The only thing preventing Intel from going that route now is because of pride and keeping the Itanic on life sup
Re:Will AMD's x86-64 and Intel's x86-64 (Score:2)
Very Likely (Score:5, Informative)
However consider this:
AMD has been shipping Opteron for nearly a year already, and ports of the main OSs (including Windows and Linux) have been done, with others already working in the lab. It also runs old 32-bit OSs with no change. It will run legacy x86 code at full speed along side new 64-bit code. It is more efficient in terms of useful work done per clock cycle compared to Pentium 4 and Xeon. It scales better in multi-way systems (very important in workstations and serves) : the logic is built in. Xeon does not have this (and plain P4 is limited to single-way). It has a built in memory controller. It has twice as many registers. It's very inexpensive. Go and look up your favourite component retailer right now and compare an Opteron to a Xeon (and even the "high-end" Pentium 4).
The only place AMD may have trouble selling is to the ignorant masses who buy on MHz (or GHz) from highstreet stores, and pay too much.
The corporate world is more clued-up, and so are the enthusiasts and power-users.
Even if AMD does not knock intel off of it's perch, there is a huge potential market for Opteron. Several major corporations are behind Opteron. They've committed to it. It's going to be big business. 2004 will see a radical change in the hardware business. I predict that in the second half of this year, people will laugh a 32-bit PeeCees. They will be obsolete and bargain-basement by then.
Re:Very Likely (Score:5, Insightful)
However, your other comments about AMD and the Opteron are spot on, IMO - the enterprise world is NOT going to buy a competing, slightly incompatible 64bit platform when it has already invested in another 64bit platform that is ALREADY AVAILABLE and is KNOWN to be just as fast/faster than a 32bit commodity platform or an older 64bit platform like a PPC box from IBM. It's hard enough these days for IT departments to support the current heterogenous mix of 32bit commodity desktops and servers and the old/new 64bit platforms from AMD and IBM. Throwing in a third which could cost even more and add more headaches would be pretty hard to sell, IMHO.
You were also right about marketing; AMD abolsutely MUST find a way to conclusively show that GHz != Speed. They need a new aggressive marketing campaign ASAP - unless the rumours about Prescott being a bit of a dud are true.....
Either way, AMD knows that they're sitting on a goldmine; they just need to exploit it as much as they can.
Re:Very Likely (Score:2)
IMO, that's part of the problem with 64bit computing: the only people who are
It's not the bits, it's the instruction set. (Score:3, Interesting)
Intel has tried to patch this with extended instruction sets before, like MMX, but they haven't been able to discard the legacy design. The last big improvement in their architecture was when they went from the 286 to the 386, and were able (eventually) to shed the overhead of 16-bit segments. Mostly... and they did that by making it a completely different mode instread of a patch on the existing instruction set the way the 8086-80286 transition was.
If their new "extensions" have a better instruction set, they will be able to perform the same kind of break without losing their existing user base. They tried to do this with IA64, but the processor was too slow and the IA32 "mode" was WAY too slow. It remains to be seen whether the new chip does a better job.
If they had been smart, they'd have kept the Alpha EV8 team intact after they bought them from the Compaq fire sale, renamed it the "IAXP", and shipped it with a hardware IA32-Alpha recompiler for legacy support.
Re:It's not the bits, it's the instruction set. (Score:2)
Re:It's not the bits, it's the instruction set. (Score:2, Informative)
AMD has solved these problems in the Opteron (and Athlon 64) by doubling the number of integer registers (to 16) and making them
Re:It's not the bits, it's the instruction set. (Score:2)
I would have preferred them to make a cleaner break with the legacy instruction set, but I suppose they figured their just-in-time recompiler makes the instruction set details less critical, and since x86 compatibility isn't going away t
Licensing? (Score:3, Interesting)
Does anybody know if the extensive cross-licensing agreements that exist between AMD & Intel cover the x86-64 additions?
Would that not be the cats meow if Intel had to pay AMD royalties for each chip they sold?
AMD fan or Intel fan; we are damn lucky that there is competition.
Old News (Score:2, Informative)
Let's keep it current.
Intel, AMD, etc (Score:5, Interesting)
Re:Itanium (Score:5, Informative)
Re:Itanium (Score:5, Informative)
Re:Itanium (Score:2)
Re:Itanium (Score:2)
Re:Itanium (Score:4, Interesting)
This is only correct if you consider microcode to be the "native instructions" on AMD. Itanic introduced a whole new ISA, which I guess requires some kind of 'morphing to support x86. Opteron uses the existing x86 ISA with a small number of 64-bit extensions. So, x86 is the "native instruction" set for the AMD CPUs, which allows for much better performance of current 32-bit applications.
Furthermore... (Score:4, Informative)
...the only two major computer system manufacturers who have elected to rely upon the Itanium are HP and SGI.
HP is manufacturing a number of different Itanium systems and winning performance awards with them. The largest is the "Superdome" which I believe will hold 64 CPUs. The Superdome is interesting in that it can accept either the old (soon to be discontinued) PA-RISC processors or the newer Itanium chips (hopefully Sun will do something similar with Sparc and Opteron in a revision of the e10k line).
SGI also makes a Linux Itanium NUMA supercomputer called "Altix" that is far more scalable than Superdome.
Both of these companies are going to be royally shafted if Intel produces a chip using the Opteron/Athlon64 instruction set. Intel has been incredibly unwise in not dropping the cost of the Itanium below the Opteron. Itanium has flaws, but it does have some incredible floating point performance.
HP is probably of the greatest concern. They ported their enterprise UNIX (HP-UX) to Itanium some time ago, and they are nearing a stable port of the OpenVMS operating system to Itanium. These operating systems have large, dedicated followings and they are technically quite advanced (far more so than Linux in many respects).
If the Itanium fails, it will be a bloodbath for HP enterprise systems.
Re:What's next for Apple? (Score:2, Funny)
The same thing they always do with Intel - ignore them and hope that they go away.
Re:Stack size (Score:2)
Re:How fast are things really getting? (Score:5, Informative)
To speed a computer up, the best way is to look for what's slowing it down the most, and speed that up.
To sell more computers, the best way is to look for what's easiest to speed up, and advertise that as the big advantage.
It's actually possible for a clock speed improvement to be accompanied by other changes that slow down some programs. Intel hit that when the first generation XScale was used in the Pocket PC... the big bottleneck for video on the ARM chips used in the Pocket PC was memory bandwidth... they had 206 MHz processors and 100 MHz memory and people were trying to play videos from memory cards that were far slower than that. They sped up the ARM instruction set on the XScale by breaking the instructions up with a longer pipeline. What happened? Well, that longer pipeline actually increased the impact of the slower memory by increasing the impact of a "bubble in the pipeline" when it had to go to main memory instead of cache to load instructions or when a mispredicted branch forced it to discard partially completed instructions, and on some benchmarks the 400 MHz XScale was actually slower than the 206 MHz StrongARM... and some vendors actually ran the XScale at 200 or 300 MHz!
The second generation XScale's 200 MHz bus largely solved that... at the cost of having to use faster and more power-hungry RAM. Everything's a tradeoff.
So, if you have a computer with a 266 MHz memory bus... how much difference do you think you'll see going from a 700 MHz processor to a 1.4 GHz processor or even a 2.1 GHz one? Well, that depends on what you're processing! If your program and its data is small enough to mostly fit in the cache, you'll get a big boost. If you're playing a videogame with megabytes of graphics being shoved down the AGP port to the video card, probably not a whole lot... save your money and upgrade the graphics card instead.
And that's why memory chips keep changing, they keep coming up with faster and faster memory... but that's falling further and further behind the marketing MIPS because there's a lot fewer tricks left to pull to market those numbers up.
Re:How fast are things really getting? (Score:2)
Re:AMD (Score:2)