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Dual-Core Shoot Out - Intel vs. AMD

sebFlyte writes "The Intel vs AMD battle of the benchmarks continues. ZDNet is running its rather comprehensive-looking guide to a side-by-side test of Intel and AMD's dual-core desktop chips, the Athlon 64 X2 3200+ and the Pentium D 820. They look at pure performance, as well as the difference it makes to apps you might use on the desktop. In the end, AMD comes out as the winner. From the article: 'AMD currently offers the most attractive dual core option. The Athlon 64 X2 3800+ may cost $87 more than its Intel counterpart, the Pentium D 820, but the AMD chip is a much better performer. It also uses considerably less power.'"

26 of 311 comments (clear)

  1. The best deal RIGHT NOW in processors by Work+Account · · Score: 4, Informative

    The best price/performance deal is the $146 AMD 3000 chip.

    It is an amazing little bugger that can git er done with ease but does not cost and arm + leg.

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    1. Re:The best deal RIGHT NOW in processors by msormune · · Score: 3, Informative

      No, the best deal is to do absolutely buy nothing if you have a less that 3 year old system and do not play any modernish games.

  2. Really? by NVP_Radical_Dreamer · · Score: 4, Insightful

    It costs almost $100 more and is faster? What are the odds...

    --
    The best argument against democracy is a five-minute conversation with the average voter.

    - Winston Churchill
  3. compared to the top-of-the-line pentium by morcheeba · · Score: 4, Interesting

    Or, put another way, the bottom-of-the-line AMD 3800+ is less than 1/3rd the price of the top-of-the-line Pentium 840 EE ($328 vs. $999), yet it still beats it in most of the benchmarks.

    Too bad they didn't compare the Pentium D 830 in the benchmarks - this is closer in price to the AMD 3800+

  4. Coral Cache by bflong · · Score: 3, Informative
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  5. Yawn... buy AMD. RAM access is everything. by Dr.+Zowie · · Score: 5, Informative

    Isn't this like the fourth time we've seen a Xeon-vs-AMD benchmark on the front page? It's old news.

    The problem with the Xeons is they're totally throttled. The Xeon was like a V-6 engine under a VW carburetor; the dual-core Xeon is like a big-block V8 under the same carburetor.

    The AMDs have better access to RAM and better (independent) cross-CPU communication. The dual-core Xeons were clearly rushed to market to answer AMD's offering, before Intel could get their own memory-access ducks in a row.

  6. again, find an informed author!!! by Anonymous Coward · · Score: 5, Informative
    I was doing ok with article until I got to the two points about how their disk defrag and antivirus/spyware apps were running, slowing the machine down, and how a dual core would make this so much better. A dual core will do NOTHING for this user!!! Those two examples highlight the perfect situation where the bottleneck isn't even close to being the CPU, the disks are simply working at 100% capacity, and you can add as many cores as you want, it doesn't change that fact.


    zdnet is usually fairly good, but not this time.

    1. Re:again, find an informed author!!! by Anonymous Coward · · Score: 3, Informative

      In the Task Manager, click View->Show Kernel Times. Then the red on your CPU Usage History chart (under the Performace tab) will represent processor time spent in the kernel. Most of this is a result of disk accesses (be it direct or indirect).

  7. Dual core == (sort of) dual CPU by Homology · · Score: 3, Informative
    Most arguments for dual core reminds me very much for similar arguments for using dual CPU, apart from the price, that is.

    A kernel compiled for a single CPU is faster than a kernel compiled for multipe CPU's, even when you only have one CPU. This is why OpenBSD has two kernels: 1) one cpu and 2) multpiple CPU's. The main developer of DragonBSD said that his preference is single CPU, performance wise (I'll leave that as a Google exercise).

    1. Re:Dual core == (sort of) dual CPU by Pharmboy · · Score: 3, Insightful

      Personally, I don't use dual cpus for servers because they are faster. As you say, they are not, kernel wise anyway. Dual CPUs do offer a higher availability, and the ability to crank the crud out of one cpu (compiling, etc.) while you can still get stuff done with the other. I use dual cpu VERY limited on desktop, but even then, I notice a difference in my ability to switch back and forth and start new apps, etc. while I am doing very heavy tasks.

      On the server side, if a single threaded process goes haywire, instead of locking the box up, I can still log in and kill the process, no biggie. I have accidently "infinite looped" myself to death on single cpu boxes, and had to hard boot them, where on the dual, that wouldn't be an issue. That is just my experience, but I've been using dual cpus on several servers for over 6 years now. I would rather have dual 1gz than single 2.5ghz any day.

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    2. Re:Dual core == (sort of) dual CPU by ArbitraryConstant · · Score: 4, Interesting

      "A kernel compiled for a single CPU is faster than a kernel compiled for multipe CPU's, even when you only have one CPU. This is why OpenBSD has two kernels: 1) one cpu and 2) multpiple CPU's. The main developer of DragonBSD said that his preference is single CPU, performance wise (I'll leave that as a Google exercise)."

      Dillon said he felt FreeBSD's focus on many CPUs to the exclusion of single-CPU performance was a mistake, not that single CPUs are preferable.

      Also, most desktop workloads benefit from having two CPUs, it helps responsiveness quite a bit (even on OSes with good schedulers like Linux). There is overhead for the locking in the kernel, but the benefit almost always outweighs the cost.

      --
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    3. Re:Dual core == (sort of) dual CPU by hackstraw · · Score: 3, Interesting

      Personally, I don't use dual cpus for servers because they are faster. As you say, they are not, kernel wise anyway. Dual CPUs do offer a higher availability, and the ability to crank the crud out of one cpu (compiling, etc.) while you can still get stuff done with the other.

      Thats called scaling.

      I would rather have dual 1gz than single 2.5ghz any day.

      Me too. Personally and professionally I am simply able to do more when I have more processors available. In fact, a researcher friend of mine has a single CPU Intel machine with hyperthreading. His other researching buddies like to run CPU intensive programs wherever they can find a spare processor. It was irritating him that people were running programs on his box and it wasn't very responsive. He would renice the process, and that helped some. He then enabled hyperthreading, and then he didn't notice when people were running on his machine anymore.

      I've done benchmarks with "normal" applications, and overall I get the best performance when doing X number of things in parallel where X == the number of processors, cores, or "hyper-whatevers". Its that simple. I'm saying "best performance" not a linear or superlinear performance, but oftentimes its at least I get 30% more out of enabling hyperthreading. It also just makes the machine more smooth and interactive.

      I welcome the day when every computer has 30 or so processors. The more the better. Just so long as they go completely to sleep when not needed or in use. Someday.

  8. Amd vs Intel by Daveznet · · Score: 5, Funny

    Ahh the AMD wins overall in performance but can it cook make me a sunny side up egg as fast as the intel :P

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  9. Wait a minute... by MyOtherUIDis3digits · · Score: 3, Funny

    I read somewhere recently that 'more watts used' = 'more powerful'

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  10. Re:AMD looks fine on paper, but... by SpinyNorman · · Score: 5, Informative

    Huh? No reason you can't use Intel's compiler for AMD64 it if you like the code it generates (AMD64 supports SSE/SSE2).

    Intel themselves even point out that their compiler supports AMD.

    http://www.intel.com/cd/software/products/asmo-na/ eng/compilers/clin/220007.htm

    Incidently gcc 4.0 does automatic loop vectorization using SSE/SSE2, so I wouldn't dismiss it too quickly either.

  11. Itanium by msbsod · · Score: 3, Interesting

    The ultimate multi-core processor technology is VLIW (or EPIC as INTEL calls it). The cores are broken up into lots of tiny pieces, instructions are distributed through various pipes and run through whatever is available in parallel. The Itanium processor is Intel's EPIC problem child. Too complex, too much heat. Maybe it is just a bit too early for this technology. I think Intel could try to start a "mobile" Itanium project. They were quite successful with their Pentium M. Maybe that will give Intel an advantage.
    Or, Intel designs a dual-Alpha processor to beat AMD, but that sounds not like Intel, does it? Someone at AMD who might like the idea? ;-)


    Your PC may have Intel inside, but did you know that Intel's fabs have VMS and Alpha inside?

  12. Re:Backwards? by Zathrus · · Score: 4, Insightful

    The AMD chip is more expensive and uses less power than the Intel chip? Isn't it usually the other way around?

    AMD chips have been the "low power" leaders for quite some time now -- at least 2 years. Pretty much since the introduction of the Athlon XP models.

    As for the price difference -- yes, the Athlon64 X2 chips are more expensive than their Intel "counterparts", but if you look at the benchmarks or the design you'll see why -- the Intel chips are a rush job and poorly (but cheaply) designed. You don't get anywhere near the performance of the AMD design though, and Intel's already stated that this won't change until mid 2006.

    Trust me, Dell is screaming bloody murder over this -- since the superiority of the Athlon64 X2 chips is completely undeniable, more and more of the server market is now shifting to AMD. And Dell is still purely Intel. Thing is, even if Dell was willing to break their allegience, it's doubtful that AMD could fulfill the quantities that Dell would want. They just don't have the fab capacity. And unless that changes, there's little reason for Dell to anger Intel (and lose some of the vast discounts that they get from Intel in the process).

  13. Use Two Disks by AthenianGadfly · · Score: 3, Funny

    That's why you install two hard drives to match the dual cores - then you run the antivirus/spyware scanner on the one that you're not using - i.e. the one without your OS and programs.

  14. Length of time for equal total cost by zsazsa · · Score: 4, Interesting

    Okay. According to this page, at full-tilt the Pentium D 820 consumes 130.6W, while this page says the Athlon 64 X2 3800+ consumes 89W. So, how long would the Opteron have to run at full blast to make up the difference in cost of $87? Last month I paid $0.078 per kilowatt-hour. This seems to be reasonably average for the United States. 130.6W - 89W = 41.6W difference between the two. Some back of the Google-calculator math reveals: (US$ 87) / (41.6 W * ((US$ 0.078) / (kW * Hr))) = 3.05871582 years. A not-insignifigant amount of time. If you're in an area where electricity is more expensive like New York or California, the amount of time is even less!

    Feel free to correct my math!

    1. Re:Length of time for equal total cost by hattig · · Score: 3, Insightful

      The issue is that the second link is to the TDP of the X2 3800+, not the actual power consumption which will be lower than 89W, more likely 70W.

      What matters is system power consumption however. CPU + Chipset + Everything Else. Of course you can test with Everything Else being the same, so it comes down to the CPU + Chipset. AMD have an on-die memory controller, so that is a couple of Watts saved over the Intel chipset, however Intel's chipsets are traditionally quite efficient (although whether or not the chipset for dual-core processors is I don't know). Best bet is to measure at the socket.

      http://techreport.com/reviews/2005q2/athlon64-x2/i ndex.x?pg=15

      Under load:
      Pentium D 840 uses 292W at the socket.
      Athlon 64 X2 4200+ uses 178W at the socket.

      Difference is 114W. Plug that into your calculator!

    2. Re:Length of time for equal total cost by hattig · · Score: 3, Informative

      And 3800+ vs 820:

      http://techreport.com/reviews/2005q3/athlon64-x2-3 800/index.x?pg=13

      "The system based on the X2 3800+ draws less power at idle and under load than anything here but the single-core A64 3800+. Under load, the Pentium D 840-based rig draws 292W at the wall socket, while the X2 3800+ system draws 166W. And the X2 3800+ outperforms the Pentium D 840 more often than not. The performance-per-watt picture on the X2 3800+ is impressive indeed."

      Load: 166W vs 251W (85W difference)
      Idle: 117W vs 160W (43W difference)

  15. Looks fine in real-world apps too by twodot72 · · Score: 3, Informative

    You mean it wouldn't perform well on real-world floating point applications then? Like SPEC fp 2000?

    Spec fp 2000 results

    Oh, I dunno, I think those AMD results look pretty good...

  16. Re:Backwards? by KylePflug · · Score: 5, Interesting

    It's also worth noting that Intel's marketing machine has been an enormous success. For many average-joe computer users, AMD is in the same category as Linux and Firefox -- something nerds get excited about, but (they think) will destroy their computer or break the intarnets.

    Even some of the more tech-savvy people I've run into aren't aware that an AMD will be essentially transparent to the user, except in that it has historically been more bang for the buck, especially for the gamer. And even when you tell them of a personal preference for AMD, or certain AMD chips, for whatever reason, the vast majority will still assume that since everybody (even Apple, soon) has "Intel inside," Intel is the way to go. Even if you convince them that AMD is a processor and not some kind of nerd voodoo magic, they won't be compelled to switch unless a computer salesman tells them it's cheaper and better while they're at the store.

    By way of analogy: Every time I see a Dodge commercial for some HEMI-powered truck, I think "Oooh, it's got a HEMI. That must mean it's better than my poor HEMI-less Chevy." Do I know what the hell HEMI even means? Not at all. Which is why I'll have to ask one of my car-nut friends if I ever (god forbid) truck shopping. It's pure marketing and name recognition. People trust Intel becuase they think it makes the world go round. AMD is some communist revolutionary nerd chip from hell. (OK, that's exagerrating. But you get the idea.)

  17. Re:Pick two by nickysn · · Score: 3, Informative

    You're talking about the infamous THG video. No, Athlon 64 doesn't suffer from that. (downloading videos from THG may need registration) See also this.

  18. Nobody mentions memory by bofar · · Score: 3, Informative

    The thing that bothers me about all these reviews is they fail to mention that the Intel processors need (more expensive) DDR2 memory versus DDR for AMD. If one is going to compare prices of the processors, the cost of the faster memory required by should be included in the price of their processor. Also note, that when AMD comes out with Socket M2 processors, which support DDR2, then they should benchmark even faster.

  19. Re:Backwards? by Bun · · Score: 4, Informative
    Every time I see a Dodge commercial for some HEMI-powered truck, I think "Oooh, it's got a HEMI. That must mean it's better than my poor HEMI-less Chevy." Do I know what the hell HEMI even means? Not at all. Which is why I'll have to ask one of my car-nut friends if I ever (god forbid) truck shopping.

    Why wait?

    The term 'Hemi' is short for 'hemispherical', which describes the shape of the cylinder head's combustion chamber. From Wikipedia:
    The chamber design puts the intake/exhaust valves in-line, rather than side-by-side, allowing for better flow of air through the head. The spark plug in the center of the chamber makes for better ignition of the fuel/air mixture. These aspects help make the hemi-type engine more efficient and powerful.

    The hemispherical cylinder head increases the engine's efficiency through reduced thermal energy loss and increased airflow through the engine, but drawbacks such as increased production cost has meant that it has been a rare design.

    --
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