Core Duo - Intel's Best CPU? 305
Bender writes "How good is Intel's Core Duo mobile processor? Good enough that Apple chose to put it in the iMac, and good enough that Intel chose to base its next generation microprocessor architecture on it. But is it already Intel's best CPU? The Tech Report has managed to snag a micro-ATX motherboard for this processor and compared the Core Duo directly to a range of mobile and desktop CPUs from AMD and Intel, including the Athlon 64 X2 and the Pentium Extreme Edition. The results are surprising. Not only is the Core Duo's performance per watt better than the rest, but they conclude that its 'outright performance is easily superior to Intel's supposed flagship desktop processor, the Pentium Extreme Edition 965.'"
Having used a Intel Dual Core for awhile ... (Score:4, Informative)
Re:Having used a Intel Dual Core for awhile ... (Score:2, Funny)
The Vaio AFAIK contains a Pentium M - which means they're on the very cool end of Intel processors.
Re:Having used a Intel Dual Core for awhile ... (Score:2, Informative)
Pentium-M 2.26GHz 90nm 27W
Core Duo 2.16GHz 65mn 31W
Of course, there's low-watt versions of all of these.
Re:Having used a Intel Dual Core for awhile ... (Score:2)
None of the Pentium M processors uses a Prescott core, with a TDP in the ranging from 84 to 115 W. As I said, Core Duo isn't even close...
Re:Having used a Intel Dual Core for awhile ... (Score:2)
Please, do it as well, as you don't seem to have read what I wrote at all. I did a comparison of the Pentium M to the Prescott, saying they weren't even close in TDP. It is a comment on the Pentium M, yes, but not only. The Pentium M variants you mentioned are so close to the Core Duo that the difference is negligible in comparison with the difference to the Prescott cores, basically, you dismissed my comparison without ev
Re:Having used a Intel Dual Core for awhile ... (Score:2)
Hot vs. OTHER Intel chips Holy Toasters Batma (Score:2)
Re:Hot vs. OTHER Intel chips Holy Toasters Batma (Score:2)
Re:Having used a Intel Dual Core for awhile ... (Score:2)
Re:Having used a Intel Dual Core for awhile ... (Score:2, Offtopic)
A good slim laptop with 10 hours battery life may have been possible.
Re:Having used a Intel Dual Core for awhile ... (Score:2)
Re:Having used a Intel Dual Core for awhile ... (Score:2, Informative)
Heat is a huge consideration to many people, often the deciding factor.
Assuming that the machine has been engineered sufficiently well to prevent the processor from melting down
It doesn't matter how well the machine is engineered. If you have hot componentry you'll have a hard time getting rid of the heat without making a lot of noise, especially under load.
But I never even considered not buying one because of the heat
What choice did you have? With laptops (especially Apple) yo
Re:Having used a Intel Dual Core for awhile ... (Score:2)
That was also one of my reasons for buying an X2 rather than an equivalent P4.
The consideration is power consumption. More heat means more power draw means more expensive.
Don't forget it's a double hit - not only does the chip consume more power, but the air conditioning needs to be more powerful too.
They lost me in the last round.
They lost me for a couple of reasons, and heat was one of them. Before that, all my (PC) CPUs were Intels.
Re:Having used a Intel Dual Core for awhile ... (Score:2)
I had a 15" AMD+ATI laptop once and it was so unpleasant to use. My wrists would get hot and sweaty, which in turn would get the laptop all sweaty.
I have since switched to a 12" laptop with a cooler CPU and couldn't be happier with it. No more hot wrists, no more stinky laptop...
Re:Having used a Intel Dual Core for awhile ... (Score:3, Insightful)
Re:Having used a Intel Dual Core for awhile ... (Score:2)
Re:Having used a Intel Dual Core for awhile ... (Score:4, Informative)
Also, heat can actually reduce the life-span of components.
Re:Having used a Intel Dual Core for awhile ... (Score:5, Insightful)
Extremely important.
It's blindingly obvious why it is important in laptops - not only because of battery lifetime, but also because the cooling assembly size and weight depends on TDP, and of course for user comfort considerations. Intel started a mobile CPU revolution with the Pentium M, so it's a little disappointing to hear that its latest successor doesn't improve further.
It's just as blindingly obvious why heat is terribly important for servers, where rack heat and power density has long been the limiting factor to packing more servers into less space.
On desktops, to me personally, heat is a premier consideration when choosing any chip. I have no need for something twice as fast as my current CPU if it consumes twice the amount of power. I expect better.
Re:Having used a Intel Dual Core for awhile ... (Score:3, Informative)
Wha?? Did you even glance at the article?
The Core Solo uses the same power as the Pentium-M to deliver more performance. The Core Duo uses slightly more power than the Pentium-M to deliver a lot more performance. Ergo, the performance per watt figures in both cases are better than the Pentium-M's.
In what sense, exactly, does the Core (Yonah) series not contin
Heat is a problem (Score:2, Insightful)
As a slashdotter this probably doesn't concern you (Score:2, Informative)
Re:Having used a Intel Dual Core for awhile ... (Score:5, Insightful)
The impression I got was that Jobs was trying really hard to avoid mentioning the battery life; the MacBook Pro was still in development and all they had were prototype models, so they actually didn't know what the battery life would be; they were guessing it should be "about the same" (as the PowerBook G4).
They are slow. My old G4 laptops kick the shit out it for media type tasks, about the same for single thread performance, and of course are slower for multi-threaded tasks.
Are you running all native applications? If not, it's not a fair comparison (and if you really need apps that aren't available natively yet, maybe you shouldn't have bought one yet). If you are running native apps, your experience seems to disagree with most reports I've heard.
It seems the speed most people are claiming for the MacBook Pros is due more to the faster video cards and the silky smooth desktop acceleration people weren't use to with their old G4 machines.
I'm really looking forward to this.
It is depressing to think that if Apple hadn't pissed off IBM that we could be running much faster/cooler dual core 970 PowerBooks right now.
If Apple hadn't pissed off IBM? When the G5 was released, Apple announced that they had 2GHz then, but would have 3GHz in one year. What was Apple supposed to do when that never happened? Just wait and hope that IBM figured out how to make something work?
Instead dual boot AMD Windows/Linux systems are looking like the only option for people who don't want to pay twice as much for x86 hardware.
Show me a laptop with comparable specs for half the price of a MacBook Pro. I think you're trolling.
Re:Having used a Intel Dual Core for awhile ... (Score:3, Interesting)
By contrast, I just got an IBM ThinkCentre desktop system at work, featuring a dual-core
comparable price, but not half. (Score:2)
Re:Having used a Intel Dual Core for awhile ... (Score:2, Interesting)
CoreDuo 1.83GHz, Windows Media Center (with recovery CD), 1GB RAM (vs. 512MB), 15.4" 1680x1050 widescreen SXGA+ (vs. 1440x900), 80GB SATA, DVD+/-RW, 802.11, 128MB ATI X1300 (vs. 128MB X1600), 85WHr battery (vs. 60WHr), 1 year warranty for $1342 (vs. $1999 so 33% less). Dimensions are close (same width, Dell is 0.5" taller, about an inch deeper, and 0.5lbs heavier). Pretty close comparison. Is it twice as much, no, is it a substantial increase, yes. I'm sure somebody will post "but wha
Depends (Score:5, Informative)
Re:Depends (Score:2)
True fact: The minimalistic 6502 (which had been used in Acorn's BBC micro & predecessors) was the inspiration for the ARM RISC CPU (formerly Acorn Risc Machine, then renamed as Advanced Risc Machine).
Re:Depends (Score:2, Interesting)
drewk
The 8080? No way! The Intel 4004 was smokin' hot! (Score:5, Funny)
It was indisputably not only the best microprocessor Intel had produced to date, but the best microprocessor on the market.
Simply no contest. No argument. It superlative in every way, the fastest, the cheapest, the lowest in power consumption, the most advanced in architecture, the widest path. It was king of the hill, the top of the tree, the Cadillac of microprocessors, the ne plus ultra, it bestrode the world of microprocessors like a colossus.
The world will never again see the day when one manufacturer so dominated the microprocessor market that a single product had a 100.0% market share.
Re:The 8080? No way! The Intel 4004 was smokin' ho (Score:2)
Re:The 8080? No way! The Intel 4004 was smokin' ho (Score:2, Funny)
Goddamn, are all the UIDs over 500000 stupid 13-year-old kids who don't understand English?
Re:The 8080? No way! The Intel 4004 was smokin' ho (Score:2)
Re:Yes, it was really 100% (Score:2)
It was 100.0%.
It was 100.00000000000%.
Everything I stated was indisputable objective fact, not opinion.
Re:Yes, it was really 100% (Score:2)
History (Score:2)
If you don't know what those are, either, you may find that they are really quite worth finding out about.
Re:History (Score:2)
Re:History (Score:2)
Re:The 8080? No way! The Intel 4004 was smokin' ho (Score:2)
It was indisputably not only the best microprocessor Intel had produced to date, but the best microprocessor on the market.... The world will never again see the day when one manufacturer so dominated the microprocessor market that a single product had a 100.0% market share.
Indisputably if you ignore the Motorola 6800 and the MOS 6502 and the Z80. Even if you did ignore them, you still wouldn't end up with 100% microprocessor market share for the 8080.
Re:The 8080? No way! The Intel 4004 was smokin' ho (Score:2)
Dude, he wasn't talking about the 8080. He was talking about the 4004. And trust me, that processor really did have 100% market share.
CoreDuo != Core Microarchitecture (Score:5, Interesting)
The new core microarchitecture, if you read the Ars Technica article in the previousl
Re:CoreDuo != Core Microarchitecture (Score:2)
Just for those who dont know, improvements in the "core"-core are stuff like twice the shedulers, superscalar sse-x with duplicated units (so 2 identical commands can be committed per clockcycle, no only combinations) and 4 integer units.
But as much as i like those spec, the naming SUCKS. Yeah, the core architecture is new, but shouldnt be confused with the architecture of core duo, which is a dual core cpu, in contrast
Re:CoreDuo != Core Microarchitecture (Score:2)
Re:CoreDuo != Core Microarchitecture (Score:5, Insightful)
This is more than just a matter of semantics. The major micro-architectural features that defined the P6 are still present in Merom. The P4 architecture (may it rest in peace) was a brand new architecture -- Merom is not.
Re:CoreDuo != Core Microarchitecture (Score:2)
Re:CoreDuo != Core Microarchitecture (Score:5, Informative)
That's not to say there isn't a small army of design engineers at Intel and AMD who work with nothing but schematics - there are. Its just that most of the logic design work is done on the HDL coding level (with either VHDL, IHDL, Verilog, or some other tool). You only start dealing with schematics at a much later stage of development. Until then your designs are constantly changing and its infinitely easy/faster to change a few lines of HDL code than to re-write hundreds/thousands of wires and transistors.
I've worked at both Intel and AMD in the past and in both cases you could take the entire codebase for a processor (HDL, microcode, ROM, etc), compile it with the right HDL compiler and run the entire thing with small test programs as a simulator. Thats how much of the validation/verification work is done before they make the masks.
As for using the old code bases... That's done a lot. There's just too much complexity and too little time for them to re-write every processor from scratch. You also have countless hours invested in making sure previous designs work. If you're only doing small changes it would be hard to justfy building something from scratch since you'll have to do all of that validation work again.
Re:CoreDuo != Core Microarchitecture (Score:2)
To those of us old enough to remember, it looks more like part of the family that started with the CDC 6600 over 40 years go. :-) For anybody who cares to look, Design of a Computer: The CDC 6600 [bitsavers.org] (Warning: PDF), describes what may well be the greatest microarchitecture ever. It's by Jim Thornton, who was (to quote Seymou
Hotter the Better (Score:2, Interesting)
Even more reviews (Score:5, Informative)
Common Knowledge (Score:3, Insightful)
I thought that the only reason the P4 had not been totally abandoned already was that it takes time to switch directions in such a massive company. (and with so many partners that design around your product)
Re:Common Knowledge (Score:2)
Obvious (Score:2)
If those figures... (Score:5, Insightful)
Sad, in an awkward way.
What? (Score:2, Insightful)
Athlon 64 X2 is a 64bit processor.
I care not how much power it uses or how well it runs Word or whatever else they are doing to test these things.
The Core Duo cannot do the same things the Athlon 64 X2 can. Largely because (gasp) it cannot run 64bit code.
What the hell is the point of this comparison?
Re:What? (Score:5, Informative)
Re:What? (Score:5, Informative)
Re:What? (Score:2)
But unfortunately to *access* the extra registers, you have to use extra prefixes/suffixes on the instructions (because x86-64's instruction set is a strict superset), which makes them longer, which eats up more Icache. The small benefit of having the extra registers visible to the compiler is often reduced or squashed entirely by a few percent more cache ch
Re:What? (Score:4, Informative)
For example: AMD's claims about UT2004 being 20% faster in 64-bit mode turned out to be bogus (more like 2%).
Re:What? (Score:2)
The x86_64 additions *DO* help performance in many real-world examples from MPEG encoders to cryptographic algorithms to various other register intense algorithms.
As for your last sentence that's so wrong I don't know where to begin.
Look into how much a stack spill costs compared to just using a register to hold a value. Then tell me x86_64 doesn't help.
Also keep in mind not all registers are 64-bit. You can access the *EXTRA* registers as 64-bits, 32-bits, 16-bits and 8-bits
Re:What? (Score:2)
And as I said unless you remove the dependency alltogether register renaming only helps serialize the pipeline. The idea is you can feed the result off the ALU bus directly into the execution engine again.
That helps keep a low level of bubbles but doesn't help with IPC beyond 1.0
A register-register feed is a zero cycle access. e.g.
MOV EAX,EBX
ADD ECX,EAX
ADD EDX,ECX
The result each operation will forward to the other
Re:What? (Score:2)
I do suspect that the number of people that
The other advantage of 64 bit (Score:2)
mmaping is often both simpler and lower overhead than reading from the file into a buffer only to pass the data straight back to the OS to send down a socket or whatever.
however on a 32 bit architecture you can't mmap anything above a few gigabytes and thats assuming your only handling the one large file in your process at a time.
Re:What? (Score:5, Insightful)
What the hell is the point of this comparison?
You're correct, of course. However, many of us don't need to run 64-bit code. You can completely ignore this, because any 32-bit CPU doesn't fit your needs, but please try to understand that other people need different things.
Re:What? (Score:4, Insightful)
I drive an 18 wheeler, and I can't imagine why anyone would want a passenger car. You can't haul near the same amount of goods!
Re:What? (Score:5, Informative)
Re:What? (Score:2)
Such as? A 64 bit chip generally means that you'll be addressing gobs (>4GB) of memory. Since that isn't a concern at the moment, Intel hasn't rushed EMT64 [wikipedia.org] into their laptop chips. However, EMT64 will be in the Merom [wikipedia.org] processor, scheduled for late this year.
AMD has both Turion and Sempron 64 bit processors available for mobile platforms, but you may notice that they are very difficult to find in n
Re:What? (Score:2, Interesting)
Re:What? (Score:2)
Consider how you write software now. At best you have a few GPRs to work with. Even with register renaming [which all modern x86 processors have] you get at best, let me repeat, at *BEST* serialized performance.
Extra registers means you can do various things at once. Consider a simple loop like
for (x = 0; x 1000; x++) {
t[x].p[2*x] += s[x].q[3*x];
s[x].q[3*x+1]
Benchmarks (Score:3, Informative)
No way! (Score:2, Funny)
2.0 iMac versus 2.8 P4 (Score:2, Interesting)
I know it's subjective, and I'm now running OS X instead of Windows, but still -- I definately *feels* more powerful.
boxlight
Re:2.0 iMac versus 2.8 P4 (Score:2)
How much RAM in each system? What kind of video card? Shared AGP or dedicated video memory?
Take note! Many of these features inside AMD too. (Score:5, Insightful)
SSE3 has some very nice hardware thread synchronization instructions. These are important (and AMD has them now). As for the instruction grouping, that sounds rather suspiciously like the double dispatch operations [chip-architect.com] that were added to Opteron:
"Appendix C of Opteron's Optimization Guide specifies to which class each and every instruction belongs. Most 128 bit SSE and SSE2 instructions are implemented as double dispatch instructions. Only those that can not be split into two independent 64 bit operations are handled as Vector Path (Micro Code) instructions. Those SSE2 instructions that operate on only one half of a 128 bit register are implemented as a single (Direct Path) instruction."
Assuming AMD can tune Turion64s to be more power friendly, they'll be able to best Intel's fancy new Core Duo. If they can't, then Intel may be the best game in town for the first time in a decade (assuming they price competitively).
Maybe per watt performance is the best but... (Score:5, Interesting)
Re:Maybe per watt performance is the best but... (Score:2)
Re:Maybe per watt performance is the best but... (Score:2)
Of course, there's a few months until these things are on the shelves, but with the roadmaps as they stand, and with these early Conroe benchmarks, you'd be hard pressed to convince anyone that Intel aren't going to have a very c
Re:Maybe per watt performance is the best but... (Score:4, Informative)
'Yet' is now.
Merom/Conroe defeats AMD-AM2 hands down, and AMD has nothin' on the roadmap for the next two years, because AM2 slipped a full 12 months.
Go surf around Anandtech.com
AMD is in deep doo doo.
Re:Maybe per watt performance is the best but... (Score:3, Interesting)
Realize that there isn't a laptop on the planet that can make use of a 64 bit address space, and come to my senses?
Bound to happen (Score:2)
The Pentium M on the other hand had a much better core design. It just lacked the connectivity of the Pentium 4 because it used socket 478 and similar older technologies. These new Core Duo's are the logical extension to the already good Pentium M line. I wish Inte
Re:Bound to happen (Score:2)
Re:Bound to happen (Score:2)
The Intel disk chipsets on the other hand are extremely good as far as built-in chipsets go. The only competitor would be one of the nVidia chipset boards but all of those have caused me nothing but trouble.
Re:Bound to happen (Score:2)
Hint: Stop buying your stuff at Best Buy or Circuit City.
The chips you're talking about are the Northbridge/Southbridge chips. They manage I/O for devices and memory and CPU, but they're not the actual disk drive controllers.
If you want disk performance, you should be putting in SCSI anyways, and yes, that costs $$$ (But I got an Adaptec 2960 SCSI-II card on eBay a few years ago for only about $70...).
for any SCSI haters, you
Mhz War AMD vs Intel (Score:2, Insightful)
Given the T2600 runs at 2.16ghz
Compare this to
AMD 4800+ 2.4ghz
it really does seem the 'Mhz = performance' is well and truely over...and for the first time Intel seems to be saying to AMD "We too can play your Mhz mean 'nuffin game'"
Again...the test results maybe affected by the chipsets used for the different processor architectures, which i
Practical experiance (Score:3, Interesting)
Battery life in the MacBooks? (Score:3, Interesting)
What is AMD going to do? (Score:3, Interesting)
* Apart from the Athlon MP, whose usefullness apart from a low low cost SMP server platform disappeared when stuff started to demand more bandwidth. A Uniprocessor Duron on an nForce2 owns it on anything where AGP and memory bandwidth comes into play!
Keep in mind that (Score:5, Interesting)
Re:Keep in mind that (Score:3, Insightful)
Re:Keep in mind that (Score:3, Informative)
If Intel could get to 45nm before AMD even gets to 65nm, you could kiss any performance gain that 65nm would lend AMD totally goodbye. (There's no telling how likely it is that this could happen, but seeing as both Intel and AMD are putting a great deal of their resources int
2.0 iMac versus 3.0 P4 (Northwood)... (Score:2)
Pc specs - 3.0Ghz P4 w/ HT Northwood core, 1GB memory.
iMac specs - stock Intel iMac with 1.5GB memory (+600MB memory unused).
The combination of OS X and CoreDuo has made me a very ha
Hard-Core (Score:3, Funny)
Uhmmm... count me in.
Thanks,
Leabre
Re:Load of Crap (Score:4, Informative)
Re:Load of Crap (Score:2)
VRAD definitely takes full advantage of the dual-core nature of the Intel processor - typical compile times on the desktop PC were around 50-60 minutes, while on the laptop they were just over 30 minutes. It's a fairly artificial test, admittedly (although I'm real
Re:Load of Crap (Score:4, Informative)
It sure the hell is. I have a 2.0x2 G5 desktop machine and one of the new 1.66 GHz Core Duo Mac Minis. Running Handbrake [m0k.org], the mini is easily twice as fast.
Re:Load of Crap (Score:3, Interesting)
Re:Load of Crap (Score:2)
Re:IF I could... (Score:2)
Re:IF I could... (Score:2)
Re:The real test will be time... (Score:3, Insightful)
"It might perform well now, but how long will it last under a load? Will something happen over time that they do not forsee?"
Of AMD Competition? Of continuous 100% CPU utilization? Of OEM bumblings putting on an improperly rated Heatsink fan? If there is any faith in Moore's law, then we will all come to the simple conclusion that this chip is not going to be the best forever. However, is it the best right no
Re:The real test will be time... (Score:2)
AMD processors are faster. (Score:2)
Summary: AMD processors are faster.