Reviews > CPUs > Core i7-2600K and Core i5-2500K Radeon HD 7970 Gaming-Performance-Difference

Core i7-2600K and Core i5-2500K Radeon HD 7970 Gaming-Performance-Difference

Published by Marc Büchel on 22.02.12 (48944 reads)
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In this article we're going to check gaming performance of Intels LGA 1155 Sandy Bridge CPUs when they're being supported by a Radeon HD 7970 graphics card from XFX. We're curious if there will be a measurable performance gaps between these two CPUs regarding modern games or if the 100 MHz and the absence of hyperthreading on the Core i5-2500K don't even have an influence on gaming performance.





Specifications

  i7-2600K i5-2500K
Codename Sandy Bridge Sandy Bridge
Socket LGA 1155 LGA 1155
Manufacturing 32 nm 32 nm
Transistors 995 Million 995 Million
Die-size 265 mm2 265 mm2
Clock 3.40 GHz (Turbo 3.80 GHz) 3.30 GHz (Turbo 3.70 GHz)
Cores / Threads 4C / 8T 4C / 4T
Turbo Yes (2.0) Yes (2.0)
Bus Speed 100 MHz 100 MHz
Memory DDR3 DDR3
Memory controller Dual Channel Dual Channel
QPI -- GT/s -- GT/s
L1 Execution Cache 32 KByte 32 KByte
L1 Data Cache 32 KByte 32 KByte
L2 Cache 256 KByte 256 KByte
L3 Cache 8 MB shared 6 MB shared
TDP 95 Watt 95 Watt
C1E technology Yes Yes
Enhanced Intel Speed Step Yes Yes
Virtualisation Vanderpool Vanderpool
Instruction sets MMX, SSE, SSE2, SSE3
SSE4.2, AVX, EM64T
MMX, SSE, SSE2, SSE3
SSE4.2, AVX, EM64T



Page 1 - Introduction / Specs Page 5 - Crysis / Resident Evil 5
Page 2 - Test setup Page 6 - Call of Juarez / Far Cry 2
Page 3 - 3DMark 11 / 3DMark Vantage Page 7 - Street Fighter 4 / World in Conflict
Page 4 - Unigine Heaven / Stone Giant Page 8 - Conclusion


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Author Thread
Anonymous
Published: 2012/2/23 16:13  Updated: 2012/2/23 16:15
 Re: Core i7-2600K und Core i5-2500K Radeon HD 7970 Gaming-Performance-Differenz
A similar Core i5-2550K vs. Core i7-2600K comparison would be interesting, as they share the same clock speed, while the former has 6 MB cache, lacks HTT, and has a slower uncore.
rewarder
Published: 2012/2/23 16:17  Updated: 2012/2/23 16:17
Webmaster
Joined: 07/05/2004
From: Zürich CH
Comments: 3174
 Re: Core i7-2600K und Core i5-2500K Radeon HD 7970 Gaming-Performance-Differenz
Yes, that's true. That's a good idea for another article.
I've also been thinking about doing a review, which shows the performance difference when HT is enabled and when it's disabled.
Anonymous
Published: 2012/2/23 16:38  Updated: 2012/2/23 16:38
 What about AMD?
I guess AMD isn't relevant after all. Could at least have tested it with 1100T and FX8150 too. There are a lot of people with AMD, like me, who are curious to see how a 7970 would perform on our OC'd 1100T/8150.
rewarder
Published: 2012/2/23 16:41  Updated: 2012/2/23 16:41
Webmaster
Joined: 07/05/2004
From: Zürich CH
Comments: 3174
 Re: What about AMD?
Sure! Thanks for the suggestion! We'll test that too of course.
Anonymous
Published: 2012/2/23 16:47  Updated: 2012/2/23 16:47
 Re: What about AMD?
Well, that was unexpected, lol. Thanks for considering it! And don't forget to overclock it.
rewarder
Published: 2012/2/23 17:03  Updated: 2012/2/23 17:03
Webmaster
Joined: 07/05/2004
From: Zürich CH
Comments: 3174
 Re: What about AMD?
No problem, you're welcome :-)
I mean, it seems that you guys really want to know more about this topic. Hopefully I'll be able to put the next of these articles online next week.
Anonymous
Published: 2012/3/1 5:18  Updated: 2012/3/1 5:18
 Higher Res?
These are great reviews, which answer questions many have. But I would love to see higher res's included. Of course 1080p is mainstream and important, but plenty of gamers either have or are considering moving up since monitors in general have come down so much in price, the step to *1200 is either something many are doing or may well do in the near future.

I have personally been gaming at quite high resolutions for years (multi-screen), but for over 6 years I've been primarily gaming at 2560*1600 and it just baffles me that over half a decade on (many lifetimes in the tech world), that such res's are only on specialist sites.

I even see another review posted here recently where you're benching hexa-cores with GPUs that have more VRAM than an entire rig had just a few years ago and again sticking at 1080p. You don't review a V12 with HP creeping near 4 digits strictly driving around an estate and heavily pedestrianised areas (!), and equally you shouldn't be reviewing monstrous machines with cores, cache, bandwidth, and RAM to burn on essentially a tablet resolution. (Actually, soon to be lower than "typical" tablet resolution!)
rewarder
Published: 2012/3/1 9:47  Updated: 2012/3/1 9:48
Webmaster
Joined: 07/05/2004
From: Zürich CH
Comments: 3174
 Re: Higher Res?
Very true! We're trying to arrange at least one 2560 x 1600 Display. If there is a chance we also try to get three 1920 x 1080, 120 HZ 3D Displays.

On the other side: the higher the tested resolutions are the more the GPU is going to limit and the less the influence of the CPU will be. So, to show at least some CPU limitation you need to test a resolution that is not too high. Which is one reason why I chose 1920 x 1080. The other reason is that - like you also wrote - 1080P gaming has become mainstream meanwhile. So a lot of gamers wonder wether a certain CPU makes a difference or not at the resolution they're actually playing their games.
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