Coppermine vs. Athlon 205
SaDan writes "I checked out a comparison of the new Intel Coppermine processors and AMD's Athlon chips at Tom's Hardware Guide last night. It's kind of interesting, and I thought others would be curious about how Athlon stacks up against Intel's latest offering. "
.. (Score:1)
Fantastic news for AMD stock holders? (Score:2)
Add to that Coppermines OLD core, Athlons scalability and Fab30 coming online soon and it is clear that INTC is going to have to do more than in the past to stay relevant.
If it isn't great news for AMD investors, this is at least great news for CPU buyers as INTC will have to WORK for it's money for a change!
Ace Hardware review... (Score:1)
http://www.aceshardware.com/Spades/read.php?art
That's good to see. (Score:2)
Maybe they should both seek seperate markets, AMD should go for gaming/low cost 3D workstations, and Intel should stick to servers and the like. That may even out the market, and get rid of some of this "do everything we can to keep the competitors down" attitude. I mean really, when you have that much of the market, can they really be that much of a threat?
Start working towards real technological advances, rather than mediocre enhancements to beat the competition.
Listen to me AMD... (Score:1)
even if coppermine is not as fast... (Score:5)
i really hate to say it, but it's getting to the point where it can be cheaper to buy a new system than to upgrade an older one (especially with DRAM prices so high.) of course, with the introduction of new processors and technology, older (obsolete?) models become much cheaper, and hey, a better processor is a better processor. competition is good, as long as the competition doesn't force either company out of business. that would be bad.
Healthy Competition (Score:2)
On an unrelated gripe, "Tom's Hardware Guide" isn't helping its credibility much by having a major error in the very first sentance. "pushed from its thrown"? Ugh.
Bad News (Good News) (Score:5)
(Of course, anyone that should be considering these high-end processors should be competent enough to know that performance is only positively correlated with the number of MHz. They don't run lock-step...)
(Of course, there aren't many really-high-powered laptops; there was only ever one Alpha-based laptop, few SPARC-based, and such... I agree with others that availability of faster AMD chips in the K6 series is more important at this time...)
(I half-expect to see a report from VA-Linux Systems some time soon...)
I'm still with Athlon (Score:1)
I have an Asus P2B-DS (Score:1)
Re:Fantastic news for AMD stock holders? (Score:2)
Re:Bad News (Good News) (Score:2)
Also, the new Intel chips run much cooler than an Athlon, which eases cooling issues. It might make more of a difference for those wanting to run multiprocessor machines.
The clock of the beast! (Score:1)
Slot 1 vs Slot A? (Score:4)
So AMD had to stick with the Socket370(?) form (which was the non-proprietary Pentium Pro socket.) Until they came out with the Athlon. AMD (or somebody) created the Slot A socket which is suprisingly(not!) similar to Slot 1 but not compatible. Main question: Is Slot A proprietary also? Or can other companies make processors for it other than AMD?
NOTE: The above is based on many guesses, assumptions, things I've read, and things I may have imagined reading. Please correct me or clarify (I'm sure there are errors.)
numb
?syntax error
Exactly what Intel's investors wanted to hear (Score:1)
Re:Slot 1 vs Slot A? (Score:1)
up until athlon all of amds chips past their 486 chips went into (super) socket 7 with the exception of mobile proccessors which i have no idea about.
pentium pro used socket 8
Re:That's good to see. (Score:1)
The low-end is Intel's bread and butter, their marketshare, and they can't live without that. It's what the hegemony is based on. Once they lose their marketshare, they'll have to scale back on their infrastructure, and without the Fabs, they lose their major advantage - the fact that when someone orders 10000 CPU's, Intel's got them out the door. AMD or Motorola just cries.
I wish I had a nickel for every time someone said "Information wants to be free".
Re:Listen to me AMD... (Score:2)
There's a reference to K6-III-Ps at speeds of 350, 366, and 380 MHz in AMD's retail employee website [c-3.com] (registration required), and there's this less-detailed information in their public website [amd.com]. I don't know how any of this translates to notebooks that you can actually buy that have this processor...K6-2-Ps are available at speeds up to 475 MHz, and people seem to be fixating on megahertz alone. (Not that the K6-2's bad...I have one myself and it runs like a champ, but the K6-III, from all I've seen, is substantially faster, especially at high clock speeds where the L2 cache speed difference gets totally out-of-control.)
R-E-S-P-E-C-T (Score:5)
To illustrate: my college's career fair was just a few days ago. AMD was there. They have been there in the past. In the past, only die-hard computer engineering hardware geeks talked to them. This year, however, as they had Athlon processor periphenalia and even a couple actual processors (none of which they were giving away) there was a line. I'm talking about a long line. Everybody wanted to talk to teh AMD guys. I waited in it for over twenty minutes then decided that since hardware doesn't make me feel an extreme amount of joy inside I would go talk to someone else.
Bright Young Minds (at least, I think that's what we are) are taking notice of AMD and are intensely interested in being hired by them. This seems like a Good Crowd to have on your side when speculating on the future.
Re:Slot 1 vs Slot A? (Score:2)
Slot 2 is Intel's Xeon (and P3?) slot.
Socket 370 is Intel's Celeron socket (lower cost)
Socket 8 is Intel's Pentium Pro socket.
Socket 7/Super7 is for Pentium, Pentium MMX, AMDs, Cyrixes, Rises, and WinChips.
Slot A is AMD's Athlon slot.
As for your question, I have no idea. Probably not though.
Re:Slot 1 vs Slot A? (Score:1)
Joe
.18 not impressive (Score:1)
Re:Slot 1 vs Slot A? (Score:1)
Socket 7/Super 7: Pentium, Pentium MMX, AMD K6, K6-2, K6-III (Super 7 is a Socket 7 w/ 100MHz FSB)
Socket 8: Pentium Pro
Slot 1: Pentium II/III, some Celerons
Slot 2: Pentium Xeon?
Slot A: AMD K7/Athlon - Slot A is mechnically but not electrically compatible with Slot 1.
Socket 370 - Designed by IBM - used by Intel for some Celerons & Pentium IIIs. The future for Intel - Slot 1 goes bye-bye over the next few years.
I don't know about the proprietary nature (or lack thereof) of Slot A, sorry.
Re:Please not Tom (Score:1)
It's there for you to click on Pooky. It ain't great but it amuses me.
You the *man* doin' "fulltime" x 2 OK.
CC
German article in c't 22/99 (Score:1)
http://www.heise.de/ct/99/22/132/
Re:Fantastic news for AMD stock holders? (Score:1)
It's not just brand recognition. Intel has marketing arrangements with major computer companies that virtually guarantees them a market for these CPUs on corporate desktops and low end servers. And corporations will pay well to get the "fastest" chip (read highest Mhz number).
AMD, unfortuately, can only really sell into the "home market" channel from the major manufactures. That and the "clone" and hobbiest market needs to keep them afloat until they can get into the business market.
Re:Please not Tom (Score:1)
Media objectivity (Score:1)
There are enough myths out in the world already. Please don't contribute to another.
-l
Tom's - most reliable source? (Score:1)
Re:.18 not impressive (Score:1)
this is my understanding anyway. i am not an engineer. any of those folk care to speak up?
-l
Re:Slot 1 vs Slot A? (Score:2)
Slot B: Athlon Ultra / DEC Alpha
socket 410: Intel NG connector
There were some rumors that S370 would be used by AMD, Cyrix, and others eventually as the next socket format. The reason is that socket chips are cheaper, and slots were only used because of difficulties with large caches. Eventually you go back to socket (like Intel has done), and reduce cost across the board.
Oh, and Slot-2 is for Xeon, P2 and P3 generations. Slot 1 is used for Pentium II/III and old Celerons, and S370 is used for Celerons, P3s, and Coppermine (just another P3).
I wish Intel would get their next IA-32 architecture out. The P6 architecture is anchient, and was supposed to last 3-4 years. They just seemed to put to many developers on the IA-64, and lag IA-32... though I remember reading somewhere that the NG IA-32 is supposed to have mny simularities to the IA-64 design...
Re:.18 not impressive (Score:2)
The argument can backfire: it looks like they had to go .15 and .13 microns to reach 500 and 550 Mhz. If so, how do they expect to reach 1 Ghz ? FYI, the Alpha 21264 at 600 Mhz is 0.35, at 800 Mhz ~0.25 and at >= 1 Ghz is expected to be 0.18 micron.
Re:Healthy Competition (Score:1)
I don't know. I thought it fit right in in Slashdot's battle-of-the-titons dept.
Re:Healthy Competition (Score:1)
Re:Tom should be more objective (Score:1)
He also seems a little too fond of the 3D Studio Max benchmark, it's his little toy that shows AMD doing 2x better, and he sort of glosses over the gaming performance (what was once his shouting point for AMD's and 3DNow).
In the end, it was an ok review if you just read the benchmarks. His recommendation at the end should have taken price into account, not the one 3DSMax benchmark. He just goes back onto the AMD soapbox, even including data on K6-3's and crap in the conclusion of an Intel product review.
(Note, Intel is not my favorite company. AMD has made a great chip, but Intel is responding to competition. Tom doesn't want to concede that fact. This is a Tom bash, not an AMD one).
Re:Where's the editorial review? (Score:1)
sigh...
Re:overclocking (Score:1)
Re:CPU clocks (Score:1)
It's all cache. (Score:1)
I can't wait to see an Athlon Ultra. ^^
Re:I have an Asus P2B-DS (Score:2)
Re:.18 not impressive (Score:1)
Re:Fantastic news for AMD stock holders? (Score:2)
What?
You can't?
There's numerous advantages you can tout with the Athlon: Speed (in MHz - up until today), Price, sheer Performance, but let's please hold off on scalability until AMD can point us to a supplier of 2-4 slot motherboards.
I also doubt that anyone cares how old a CPU's core is, except for the people that actually care. Kids are going to buy a CPU based on how fast they percieve it to be, regardless of architectural constraits. In that reasoning, the first company to tout 1 GHz will have something to rub in the other's face for at least a little while.
It'll be good news for AMD's stockholders when they can sell a chip that performs identically to the comparable Intel product and it costs more or at least comparable. Right now, you have to wonder how much longer their bankers will let them float with all their debt. (I'm only assuming they've acquired debt due to 6 or 7 quarters of losses.)
More of an Intel advertisement than a comparison (Score:1)
I can't even get a Coppermine box yet, so why should I care that some computer is better in theory?
--------
"I already have all the latest software."
Re:.18 not impressive (Score:2)
Intel drags it's heels in order to maximize it's profit from each successive generation of tech, only switching when they absolutely cannot do anymore with what they've got (witness the 7th generation x86).
Don't think that all the other semi-conductor co.'s follow their footsteps in that regard.
Re:Yeah But it's Tom so it's biased (Score:1)
Intel HATES him. He released a Pentium II preview with a pre-production P2 which *sucked* it up bigtime. He's probably the most overtly anti-Intel man out. Why do you think he made a reference to a "fishy article" (pun at Sharky - who is biased towards Intel.)
Re:Tom should be more objective (Score:1)
Re:Tom should be more objective (Score:1)
Re:Please not Tom (Score:1)
I will let this exchange make my point.
CC
Re:Fantastic news for AMD stock holders? (Score:1)
I was referring to the scalability of the core and the fact that AMD has room to grow, while INTC doesn't. It is true that you can't run several Athlons on the same mobo. Yet.
I also doubt that anyone cares how old a CPU's core is
See above. Investors (which was the subject ;) should/do care about this stuff. Heck INTC was resorting to overclocking tricks to get their last chips to run at speed.
Like I said though. Even in the event that AMD stumbles, this stuff is great for chip heads everywhere.
Re:Slot 1 vs Slot A? (Score:1)
Slot A is physically identical to slot 1, it just uses a different bus archecture. Methinks the EV6 bus??? (I haven't studied that bus arch. yet)
Joe Goldmeer
Re:Slashdot2NNTP gateway. (Score:1)
--
you can say it (Score:1)
Signed,
SEAL - who is sick of ticker-symbols
Athlon vs. Coppermine: Fight at 11 (Score:2)
I don't know about the rest of you, but I am VERY happy that AMD is giving Intel a run for our money.
Personally, I was getting REALLY tired of the "new" and exciting "innovative" processors a whole 33Mhz / 50Mhz faster than last quarters every quarter.
Since the Athlon has been out, P3 prices have been plummeting; I've been keeping track
of the fall in prices [cpureview.com]; there is NO WAY prices would have fallen so low without the Athlon goosing Intel!
I am very much looking forward to testing some Coppermine's, as soon as I can get my hands on them.
Re:Fantastic news for AMD stock holders? (Score:2)
Well, considering the anti-competitive pressure Intel is putting on motherboard manufacturers to avoid distributing the single processor Slot A boards they've already designed and tested, I think AMD has an uphill battle to coax motherboard makers to design an SMP board.
If I recall, the chipset designer that is working on a two-way Athlon chipset was talking about first quater of 2000 for release.
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Even for geeks, speed is secondary (Score:1)
The point is, I'm certainly not going to buy any AMD CPUs until their chipsets get stabler. This isn't intended to be FUD, but every non-USA chipset design I've used in the past (VIA, SIS and whomever) have just not been as stable (even when motherboards are from the same manufacturer) as their Intel brethren. I'm going to stick with Intel and 440BX until something stabler and better comes along -- and with features that I feel I need, unlike the 810 and 820 sets.
-Chris
Don't moderate this, bitch.
Bit by bit (Score:2)
So what if the Athlon is a tiny bit more value for the money - I'll get a lot more value if the price of a really good 19" monitor drops a couple of hundred bucks.
Re:Tom should be more objective (Score:1)
Re:That's good to see. (Score:1)
Don't put to much trust in those Quake3 numbers. In true Tom fassion, he was dumb enough to use a geometry accelerated graphics card when testing processors. He is testing the card (and how well it happens to work with the processor) tenfold more than the actual processor.
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Well done, you can swear... (Score:1)
so, the quote should have read... (Score:1)
Re:Fantastic news for AMD stock holders? (Score:1)
Bad attitude. (Score:1)
You should be ashamed of that attitude. Too many people share it. If, say Intel, is always putting out a chip 5% faster than AMD (or even 0% the way so many people buy only from the industry leader) and you types only buy from Intel, then within a few years, AMD will drop out and you'll see prices rise fast and performance rise slowly. And you'll have yourselfs to thank. Some temporary self-sacrifice from time to time can be a good thing in the long run. Do you really need that extra 5%? I'll answer for you. You don't.
Weighing in at 512K it's the Athalon Killer (Score:1)
I'm damn glad things have turned -- now we have AMD kicking Intel's ass in both price and power (For the most part -- I think that AMD is a better chip) and this really is shaking Intel up.
I mean -- really, what type of respectable company would have the "Athalon Killer" anyway.
$0.02 to AMD
-= Making the world a better place =-
Re:Slot 1 vs Slot A? (Score:1)
can anyone explain the coppermine jump in gaming? (Score:1)
Re: (Score:1)
Has anyone else heard of the 550E??? (Score:1)
Re:Fantastic news for AMD stock holders? (Score:1)
1: Both Intel and AMD have denied that this has happened. Only Tom Pabst has made this claim, and has never provided any evidence.
2: AMD has announced that they only plan to ship about 1.5 million Athlon's this year. Intel should ship 20-30 million parts in the 4th quarter of the year.
3: AMD has not commited to producing the Irongate once other vendor's release chipsets, which should occur in Q1 2000.
4: The Irongate chipset requires a 6 layer motherboard, which is very expensive to produce. The VIA chipset (coming next year) works with a 4 (5?) layer motherboard.
Now, given that you would have to produce an expensive, 6-layer motherboard, with a limited lifespan, and limited sales capabilities, would you spend your resources getting 20% of 1.5 million sales, or 5% or 20+ million sales with a motherboard that's probably cheaper to produce.
In addition, AMD has repeatedly had production problems; one analyst once said "AMD has a long history of short term problems". Intel has generally delivered what they promise (not counting the recent i820 screwups), and is known to be a world class manufacturing operation.
I highly doubt Intel would pressure anybody not to release product when simple economics would suffice.
Who Cares (Score:1)
Tom ignorance/Q3test/L2 latencies? (Score:2)
Lets think about this for a minute! If Intel didn't change the SSE core then why would a compiler with SSE changes produce a binary that ran better on the same SSE core? The answer: Because its not the compiler! A better answer would be that the changes intel made to the cache result in significant performance gains in some situations. Tom dumps their tech doc's on what they did:
1 they increased the associatively of the cache
2 they widened the L2 data path to the CPU
3 they decreased the latency
4 Lastly they decreased the size by 1/2.
In general 1 and 4 tend to cancel themselves to give similar performance (pick up an architecture book and read about caches if you don't know what I'm talking about here) So we are left with 2 and 3. Now 2 and 3 tend to allow you to get to the cache faster and get more data per cycle. Now quake is really an tiny engine (significant amount of the time it supposedly fits in L1) accessing a massive amount of data. Now lets assume that quake is so tight that it manages to fetch its data out of L2 cache a very large percentage of its time (as opposed to windows just randomly switching tasks, and using main memory like a big disk cache) now if suddenly your data loads which were always in the cache get to the processor faster keeping it from stalling a pipeline for 5 or 6 cycles what happens?
Memory architecture is a __BIG__ deal with modern CPU's. A very large percentage of time on modern CPU design is spent trying to optimize data accesses. The intel engineers have done their homework. The PC market now considers games the standard benchmark (Quake being the main one, Celery-vs-K6! When was the last time you out typed Word? On the other hand when was the last time your Celery helped you kick that poor K6 owners ass because you were getting an extra 20fps?) so they discovered a way to help quake out while maintaining decent performance with data sets that were more sensitive to cache size rather than access times.
Re:Slot 1 vs Slot A? (Score:1)
FPU Benchmarks (Score:1)
Right. (Score:1)
Strict brand loyalty is a dangerous economic force. A history of quality products, more compatible 3rd party applications, and better tech support contribute to the value of a product, and should be considered. But factors like popularity (independent of compatibility) and company size/worth should be ignored. I honestly wouldn't care if Intel were the world's biggest, nastiest corporation -- it's the chips that matter.
Names (Score:1)
Weighing in at 2 ounces...
Re:DIE TOM! (Score:1)
Smaller feature size is good (Score:2)
Just a couple of niggles here. I'm not a hardware engineer, but I do believe that's wrong. At smaller feature sizes capacitors get more efficient and switching gets faster. Because your capacitor is more efficient you can use lower voltage. As voltage decreases so does power consumption, as the square. Less power consumption = less heat, so higher clock rates.
They (Mot) did so they could reduce costs. The more chips you squeeze onto a wafer, the more money you generate from said wafer.
Errr, somewhat correct. Yield plays a big part in the equation - as feature size goes down, so does yield, especially since new untried manufacturing processes have to be brought on line each time feature size ratchets down.
The bottom line is that smaller features size is good - very good.
Re:Bad attitude. (Score:1)
Re:Bad News (Good News) (Score:2)
Not that Intel is taking this laying down, of course
Coppermine details and enhancements (note that these are pretty much ripped off of Sharky Extreme's coverage [sharkyextreme.com] of the Coppermines. Be sure to check out their site!):
Not only did they shrink the size of the transistors from the previous
Enhanced L2 cache
Rather than the 512KB, half-speed L2 cache that's been around in the P6 family for quite a while, the L2 is now 256KB running at full processor speed (and has been moved onto the same die as the core).
Cache :
Improved system buffering
"Enhanced Power Management" for Mobile PIIIs
While the smaller process results in lower power consumption, Intel has also added a technique they call Enhanced Power Management, or EPM. EPM essentially puts the CPU continuously into pseudo-standby mode, from which it can instantly accelerate to full speed when needed. This should lower power consumption further while maintaining the full capabilities of the chip.
Packaging
As well as the SECC2 Slot-1 catridge of previous PIIIs, the Coppermine will be available in a new format called "Flip Chip Pin Grid Array", or FCPGA, which offers lower power consumption and EMF interference, as well as being a less costly solution than Slot-1. Intel expects to move all the PIIIs to this format by late 2000.
Re:CPU clocks (Score:1)
This is to say, the manufactor, while not being the evil one, approximates or tends to be so, which isn't that much different.
Out of curiosity, do anyone recall any strange changes that took place at intel when people started dualing 333 Celeries?
As observed something should be going on from there to make the company look what it is today...
Add to FCPGA to the list (Score:1)
Advantages of FCPGA: lower cost, lower power consumption, and lower EMF interference.
Re:R-E-S-P-E-C-T (Score:1)
Re:That's good to see. (Score:1)
who cares? (Score:1)
Re:Slot 1 vs Slot A? (Score:1)
AMD has used the 'Socket 7' and 'Super Socket 7' sockets up until now.
>AMD (or somebody) created the Slot A socket which is suprisingly(not!) similar to Slot 1 but not compatible.
Slot A is dimentionally the same as Slot 1 (hence saving motherboard manufacturers money and resources), but uses the EV6 bus architecture, which was designed for the Alpha CPU's. EV6 allows for a 200Mhz system bus, scaling upwards of 400Mhz now on many Alpha motherboards. I think they're aiming for 600Mhz now.
Keep in mind that Intel is still struggling just to get up to a 133Mhz bus.
PS: This is only one bus, from one aspect..the entire system's buses aren't running at 200Mhz, but the capability is there for at least that speed between CPU and memory. Sorry, I'm not an engineer =)
The thing to remember (Score:1)
Great quote (Score:1)
Cache mapping... (Score:2)
A two way set associative cache allows any memory address to be placed in one of two locations in the cache. A four way cache has four spots where each memory address can be cached, etc. Again this is not a matter of size, rather a measure of how flexible the cache is.
The more "ways" the cache has the more flexible it is and this results in fewer flushes and overall more "fresh" data in the cache. This is what a cache is all about. That is, keeping the data that is needed right now, right here close to the CPU.
These "X ways set associations" are expensive in terms of logic and chip space. Ideally, a cache would be fully associative and allow any memory address to be cached anywhere in the cache memory. Because this stuff is expensive, it is usually reserved only for the highest performance parts, that is, the level 1 cache which is the closest to the processor core and usually the smaller one. AFAIK, all mainboard caches are direct mapped. They compensate by usually being bigger and even thoough they are slower, they are still a good bit faster than main memory, but nowhere near as fast as a level 1 cache or register access.
According to the previous poster, Tom got the two caches backwards. I don't have a data book on the new chip, but I'd really be surprised if they actually made an 8 way set associative cache that is 256K in size. No biggie, but it's an obvious error to those of us that know something of what the h*ll he's talking about.
As far as his comment on the benchmarks goes, I have no idea where he's coming from on that one.
Spelling errors... (Score:1)
Ha ha (Score:1)
Fine Print (Score:1)
No wonder there are so many Disclamers and Fine Prints in advertising and
Note: the opinions expressed in the preceding statement are those of the author and do not necessarily reflect those of Slashdot or Andover.net.
Bingo! (Score:1)
I don't think so. (Score:1)
Re:can anyone explain the coppermine jump in gamin (Score:1)
I've gotta better idea. (Score:1)
unity
ps:the only way to fix it is to flush it all away
I don't think so. (Score:1)
unity
ps:the only way to fix it is to flush it all away.
psps:
freakin' html.
Re:Add to FCPGA to the list (Score:2)
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Re:Exactly what Intel's investors wanted to hear (Score:1)
While the announcement may have been shareholder-motivated, I don't think their schedule is. Their schedule may be advanced by AMD, but I doubt it will be at any detriment to Intel.
Intel has always controlled the market and let the technology tickle out. I'm sure that if Intel wanted to, they would their next generation of IA32 chips on desktops now. That would be great for us, but bad for Intel. They want to get all of the intermediate upgrades.
I mean, if you are the market leader regardless, why should you release the new chip until the current chip is sold through? Intel could step things up a notch, but they have had no motivation to do so (until now).
I think that AMD's success is a great thing for the consumer. It should motivate Intel to get their chips to market faster, something that I'm sure they are capable of.
For example, Intel has been producing 0.18 micron chips for many months. They were only available on portables until now. Why? It has to be a deliberate marketing decision to get all the money they can out of the desktop market.
I hate marketing.
Re:Slot 1 vs Slot A? (Score:4)
Slot 1 is the second physical delivery of Intel's P6 bus; Socket 8 (for Pentium Pro) was the first; Socket 370 is the third, and there's every indication Intel will market a Socket 426-or-thereabouts to handle some extra pins on a socket-based Coppermine chip. The reason you can't clone this without a license is simple: Intel has patents on the P6 bus. They originally didn't license, but now they are licensing, at least to chipsets (SiS, ALi, VIA) if not CPUs.
AMD extended Socket 7 (which is once of the physical conventions for the non-patented P5 bus) to 100MHz, and ran their K6 family there. But they realized that K6 would have its limits. In part of their IP settlement with Intel, they promised not to make clones of things like the P6 bus, so legalities for everyone else aside, that wasn't an issue.
Enter DEC (now part of Compaq). DEC designed the EV6 bus for the Alpha 21264, as a remedy for conventional CPU buses. In their earlier Alpha systems, even with L1..3 cache and all, they were so dependent on memory speed, the typical bus sharing in an SMP system (very important to DEC) was a problem. Especially when you wanted to make this bus (the cricital CPU to rest-of-the-world link) extremely fast. EV6 is a point-to-point bus; all you have is a CPU and some system chip on it, never anything else. This allows them to run EV6 very fast. DEC openly licenses EV6, AMD adopted it for their CPU. Since the PC market demands a socket or slot, they created Slot A, which (for cost reasons) uses the Slot 1 connector turned around. AMD runs Slot A at 200MHz now, 266MHz in the forseeable future. DEC runs EV6 systems up to 400MHz. This is a data rate; the bus runs DDR (a new data event on every clock edge, not just every clock cycle), which really doesn't matter; the data rate is indicative of performance.
The important thing to realize about today's Athlon systems is that they're something like the first Pentium systems shipped out, retrofitted '486 systems much as the first Athlons are running based on modified Super7 chipsets. So memory is stuck at 100MHz, half the CPU interconnect's speed. You won't see Athlon reach its performance potential until 200MHz, or better, memory systems are delivered.
And I do mean "or better" because of the EV6 architecture, there's no shared CPU bus. So a system chip (North Bridge) can actually use memory faster than the CPU can deal with. With switched interconnects, proper buffering, and super fast memory, one could imagine PCI, AGPx4, and multiple Athlons all rompin' along, each at virtually full speed. This can't be done efficiently within the current P6 architecture. That's why I find Athlon interesting. I hope AMD lasts long enough for it to realize its potential.
Re:Coppermine Xeon (Score:2)
1) room for much more of the expensive L2 cache for full speed operation and modules up to 2MB.
2) redesign to the AGTL+ bus, which allows four processors to run, even using modules (versus the normal P6 bus, delivering two way SMP with the module, four way with the older socket).
3) more money. Intel knows that people who need 4-way or better SMP systems will pay for this, often to a foolish extent. Intel loves to milk some sector for high margins, and you can guess this won't happen when there's a direct (or near so) replacement like K6 or Athlon.
Ok, so now consider PIII Xeon with only 256KB of L2 cache. Certainly, this is the same chip as you get when you buy a PIII-regular. But of course, it's on the Slot 2 module, and if you want a four processor (or better) SMP system, you have no other choice. Intel basically has you, and they like it that way.
In fact, I'm surprised it only around $50.
Yes (Score:2)