Intel Core Duo (Yonah) Performance Preview - Part II
by Anand Lal Shimpi on December 19, 2005 12:55 PM EST- Posted in
- CPUs
Overall System Performance with Winstone 2004
Business Winstone 2004
Business Winstone 2004 tests the following applications in various usage scenarios:
The FP/SSE enhancements to Core Duo have no chance to shine in your everyday run-of-the-mill business applications like Word and Outlook, not to mention that the workload is not heavily multithreaded, so there's no benefit from a dual core processor. So from a performance standpoint, all we see from the Core Duo is a similarly clocked processor to the Pentium M 760, but with a higher latency L2 cache, which explains the performance deficit.
The Athlon 64 X2 running at 2.0GHz with a 1MB L2 per core manages to slightly outperform the Core duo T2500, however the performance margin is negligible.
Multimedia Content Creation Winstone 2004
Multimedia Content Creation Winstone 2004 tests the following applications in various usage scenarios:
Not all of the Core Duo's advantage over the Pentium M is due to its dual core nature, but it does account for some of it.
But as we saw in our original article, at 2.0GHz, the Core Duo T2500 just isn't able to offer performance comparable to the Athlon 64 X2 at the same speed. It is worth noting that L2 cache size doesn't really make a difference here to the X2 at all, just clock speed. Thanks to the Athlon 64's on-die memory controller, the architecture is inherently less sensitive to cache size than more conventional designs that rely on an external memory controller.
Business Winstone 2004
Business Winstone 2004 tests the following applications in various usage scenarios:
. Microsoft Access 2002
. Microsoft Excel 2002
. Microsoft FrontPage 2002
. Microsoft Outlook 2002
. Microsoft PowerPoint 2002
. Microsoft Project 2002
. Microsoft Word 2002
. Norton AntiVirus Professional Edition 2003
. WinZip 8.1
The FP/SSE enhancements to Core Duo have no chance to shine in your everyday run-of-the-mill business applications like Word and Outlook, not to mention that the workload is not heavily multithreaded, so there's no benefit from a dual core processor. So from a performance standpoint, all we see from the Core Duo is a similarly clocked processor to the Pentium M 760, but with a higher latency L2 cache, which explains the performance deficit.
The Athlon 64 X2 running at 2.0GHz with a 1MB L2 per core manages to slightly outperform the Core duo T2500, however the performance margin is negligible.
Multimedia Content Creation Winstone 2004
Multimedia Content Creation Winstone 2004 tests the following applications in various usage scenarios:
. Adobe® Photoshop® 7.0.1All chips were tested with Lightwave set to spawn 4 threads.
. Adobe® Premiere® 6.50
. Macromedia® Director MX 9.0
. Macromedia® Dreamweaver MX 6.1
. Microsoft® Windows MediaTM Encoder 9 Version 9.00.00.2980
. NewTek's LightWave® 3D 7.5b
. SteinbergTM WaveLabTM 4.0f
Not all of the Core Duo's advantage over the Pentium M is due to its dual core nature, but it does account for some of it.
But as we saw in our original article, at 2.0GHz, the Core Duo T2500 just isn't able to offer performance comparable to the Athlon 64 X2 at the same speed. It is worth noting that L2 cache size doesn't really make a difference here to the X2 at all, just clock speed. Thanks to the Athlon 64's on-die memory controller, the architecture is inherently less sensitive to cache size than more conventional designs that rely on an external memory controller.
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Furen - Monday, December 19, 2005 - link
The P6 has two FP units: An FADD unit and an FMUL unit. One of the big weaknesses of the P6 is the fact that the FMUL unit is not fully-pipelined but instead uses part of the FADD unit for FMUL operations. The K7, on the other hand, has three fully-pipelined units, an FADD, an FMUL and an FSTORE.tayhimself - Monday, December 19, 2005 - link
No he's not. AT's hardware reviewers are nublets. One thing to note though, Dothan FPU is better than the P4's hence its gaming performance advantage over the P4 in the old tests that everyone saw. It's likely that Yonah FPU is still the same as Dothan (similar to P3) and inferior to AMD's.saratoga - Monday, December 19, 2005 - link
Actually the FPU on the P4 was tremendously more powerful then Dothan or Yonah. While games do use the FPU, they're not that bottlenecked by it on modern systems. The reason Dothan did so well was because of its large, very low latency L2 cache. This is roughly equivilent to the primary advantage of the K8, a very low latency memory controller.tayhimself - Monday, December 19, 2005 - link
Youre right about the low latency L1/L2 caches on the Dothan, but the P4 (Williamette/Northwood) has those as well. But the P4 FPU is only powerful in SSE2 mode where it can load store larger chunks of data. Not all games use that unfortunately.saratoga - Monday, December 19, 2005 - link
You're wrong on several points.First:
Dothan L2 latency (clks): 10 clks
Northwood L2 latency (clks): 18 clks (approximately)
So Dothan's L2 cache is roughly 2x as fast and 4x as large. If you compare prescott with its amazingly slow L2, the situation is even more biased towards Dothan. Clearly, in terms of cache performance Dothan has a massive advantage, at least once you're out of the L1.
Second, you're confusing SSE2 and vector processing. While SSE2 can perform vector ops, it also handles plan scaler as well. In x86-64 SSE actually replaces the traditional x87 unit. The relative performance of the two is irrelevent however, the P4 was faster in both.
coldpower27 - Monday, December 19, 2005 - link
Dothan I agree with as having 10 Cycle Cache.
Northwood has 16 Cycle Cache.
Well you also got to keep in mind northwoods clock frequency plays a role in speeding up the cache, accces latencies for Dothan @ 2.0GHZ vs Northwood @ 3.2GHZ are basically equivalent. Though the 2.26GHZ Dothan has the fastest cache of all.
AlexWade - Monday, December 19, 2005 - link
Although, "Core Duo" is a stupid name. Why does Intel have to be so different? "Core Duo" is a little confusing. Is Duo a code name? What?However, despite the stupid name, we've really turned a corner in performance. Intel can make a good CPU when they realized speed isn't the future. Looks like I should start considering replacing my old Pentium-M IBM T40p with the awesome battery life.
AMD needs to respond in kind with a great new CPU. The future looks bright. Competition is once again is good for everyone.
LuxFestinus - Tuesday, December 20, 2005 - link
The ambiguously gay duo, with Ace and Gary.:) An old SNL skit.ksherman - Monday, December 19, 2005 - link
Personally, i dont like that AMD is just sitting back, seemingly waiting for Intel to catch up... They need to kick Intel while their down. these new Processors from intel look really nice and i am likely to buy one, but in a mactel laptop. I am happy for INtel that they are catching up, but AMD really NEEDS to step up and do soemthing new.Calin - Tuesday, December 20, 2005 - link
AMD's income is lower than Intel uses for R&D. You really can't expect from AMD to develop something faster than Intel can.For AMD, to have an processor they could improve a step at a time since the introduction of the Athlon64/Opteron was a need - Intel is able to mantain several teams for microprocessor development, but AMD only has money for one. And AMD will milk the market for as much as possible, selling processors that are easy to make for prices that market will accept. If AMD will start selling a higher processor grade, they would need to reduce the price for lower speed processors. This is why the 2800+ and 3000+ are discontinued - they would have to sell them too cheap.