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Discussion Starter · #1 ·
In this post I will post the results of my comparison between an FX8120 @ 4.5ghz and i5 2500k @ 4.4ghz. I could not get the i5 to 4.5ghz due to a multi wall @ x45 so 4.4ghz will have to suffice. A note on my methods: I ran each benchmark twice back to back and recorded the best result. I'll start with the synthetic benchmarks. The only thing that changed between setups was mobo and cpu, everything else stayed the same. All overclocking was done with multiplier only.

Cinebench Note: I have no idea why Cinebench reported clock speed as 3.3ghz on the 2500k. I included a screenshot of cpu-z to show the clockspeed was at 4.4ghz.

AMD System Specs:
cpu: FX-8120 @ 4.5ghz
mobo: Asrock 990FX Fatal1ty
ram: 4gb G.Skill 1600 mhz DDR3
psu: Thermaltake Toughpower 1000 watt
video card: HD6950 2gb

Intel system specs:
cpu: i5 2500k @ 4.4ghz
mobo: Asrock Z68 Extreme3 Gen3
ram: 4gb G.Skill 1600 mhz DDR3
psu: Thermaltake Toughpower 1000 watt
video card: HD6950 2gb

FX8120 3DMark 11
359

2500k 3DMark 11
359

FX8120 Cinebench cpu multi thread
318

2500k Cinebench multi thread
318

FX8120 Cinebench single thread
318

2500k Cinebench single thread
338

FX8120 Cinebench OpenGL
318

2500k Cinebench OpenGL
318

FX8120 Distribute.net Client
316

2500k Distribute.net Client
318

FX8120 Frybench
318

2500k Frybench
318

FX8120 Geekbench
430

2500k Geekbench
430

FX8120 Heaven
614

2500k Heaven
695

FX8120 MaxxMem
382

2500k MaxxMem
382

FX8120 PerformanceTest 7 2D graphics
415

2500k PerformanceTest 7 2D graphics
415

FX8120 PerformanceTest 7 3D graphics
415

2500k PerformanceTest 7 3D graphics
415

FX8120 PerformanceTest 7 cpu
415

2500k PerformanceTest 7 cpu
415

FX8120 wPrime I forgot to do the 1024M test sorry about that
290

2500k wPrime
290

FX8120 x264 FHD
507

2500k x264 FHD
507

Games:

First let me explain how I went about the gaming benches. As with the synthetics, the games were each run twice back to back with the best result selected. None of the games had AA enabled with the exception of Metro. In Metro I had a choice only between AAA and MSAA in DX11, I chose AAA. I chose the highest settings in the options menu for all games but Motion blur was always disabled. Again not sure why some games report the 2500k clock speed as 3.3ghz. The clock was at 4.4ghz for the 2500k the entire time. If a game had more than one Direct X render, I benched them all. You're going to see some really low minimum fps in benches that had physx enabled because I don't have a dedicated physx gpu and I thought it would be a good way to test out cpu performance in those games. Resolution for all games was set to 1080p which is my native resolution.

FX8120 4.5ghz Alien vs Predator 1080p high 0xAA
417

2500k 4.4ghz Alien vs Predator 1080p high 0xAA
417

FX8120 4.5ghz Batman AC DX9 1080p very high 0xAA physics high
338

2500k 4.4ghz Batman AC DX9 1080p very high 0xAA physics high
338

FX8120 4.5ghz Batman AC DX9 1080p very high 0xAA physics normal
338

2500k 4.4ghz Batman AC DX9 1080p very high 0xAA physics normal
338

FX8120 4.5ghz Batman AC DX9 1080p very high 0xAA physics off
338

2500k 4.4ghz Batman AC DX9 1080p very high 0xAA physics off
338

FX8120 4.5ghz Batman AC DX11 1080p very high 0xAA physics high
338

2500k 4.4ghz Batman AC DX11 1080p very high 0xAA physics high
338

FX8120 4.5ghz Batman AC DX11 1080p very high 0xAA physics normal
338

2500k 4.4ghz Batman AC DX11 1080p very high 0xAA physics normal
338

FX8120 4.5ghz Batman AC DX11 1080p very high 0xAA physics off
338

2500k 4.4ghz Batman AC DX11 1080p very high 0xAA physics off
338

FX8120 4.5ghz Call of Juarez 1080p high 0xAA
375

2500k 4.4ghz Call of Juarez 1080p high 0xAA
375

FX8120 4.5ghz Final Fantasy XIV 1080p 0XAA
338

2500k 4.4ghz Final Fantasy XIV 1080p 0XAA
338

FX8120 4.5ghz Just Cause 2 Concrete Jungle 1080p high 0xAA
338

2500k 4.4ghz Just Cause 2 Concrete Jungle 1080p high 0xAA
338

FX8120 4.5ghz Just Cause 2 Desert Sunrise 1080p high 0xAA
338

2500k 4.4ghz Just Cause 2 Desert Sunrise 1080p high 0xAA
338

FX8120 4.5ghz Just Cause 2 The Dark Tower 1080p high 0xAA
338

2500k 4.4ghz Just Cause 2 The Dark Tower 1080p high 0xAA
338

FX8120 4.5ghz Lost Planet 2 DX9 Test B 1080p high 0xAA
338

2500k 4.4ghz Lost Planet 2 DX9 Test B 1080p high 0xAA
338

FX8120 4.5ghz Lost Planet 2 DX11 Test B 1080p high 0xAA
338

2500k 4.4ghz Lost Planet 2 DX11 Test B 1080p high 0xAA
338

FX8120 4.5ghz Mafia 2 1080p high 0xAA physics high
338

2500k 4.4ghz Mafia 2 1080p high 0xAA physics high
338

FX8120 4.5ghz Mafia 2 1080p high 0xAA physics medium
338

2500k 4.4ghz Mafia 2 1080p high 0xAA physics medium
338

FX8120 4.5ghz Mafia 2 1080p high 0xAA physics off
338

2500k 4.4ghz Mafia 2 1080p high 0xAA physics off
338

FX8120 4.5ghz Metro 2033 DX9 1080p very high AAA physx off
328

2500k 4.4ghz Metro 2033 DX9 1080p very high AAA physx off
328

FX8120 4.5ghz Metro 2033 DX9 1080p very high AAA physx on
328

2500k 4.4ghz Metro 2033 DX9 1080p very high AAA physx on
328

FX8120 4.5ghz Metro 2033 DX10 1080p very high AAA physx off
328

2500k 4.4ghz Metro 2033 DX10 1080p very high AAA physx off
328

FX8120 4.5ghz Metro 2033 DX10 1080p very high AAA physx on
328

2500k 4.4ghz Metro 2033 DX10 1080p very high AAA physx on
328

FX8120 4.5ghz Metro 2033 DX11 1080p very high AAA physx off
328

2500k 4.4ghz Metro 2033 DX11 1080p very high AAA physx off
328

FX8120 4.5ghz Metro 2033 DX11 1080p very high AAA physx on
328

2500k 4.4ghz Metro 2033 DX11 1080p very high AAA physx on
328

FX8120 4.5ghz Metro 2033 DX11 1080p very high DOF AAA physx off
328

2500k 4.4ghz Metro 2033 DX11 1080p very high DOF AAA physx off
328

FX8120 4.5ghz Metro 2033 DX11 1080p very high DOF AAA physx on
328

2500k 4.4ghz Metro 2033 DX11 1080p very high DOF AAA physx on
328

FX8120 4.5ghz Resident Evil 5 DX9 1080p high 0xAA
338

2500k 4.4ghz Resident Evil 5 DX9 1080p high 0xAA
338

FX8120 4.5ghz Resident Evil 5 DX10 1080p high 0xAA
338

2500k 4.4ghz Resident Evil 5 DX10 1080p high 0xAA
338

FX8120 4.5ghz Stalker C.O.P. DX11 1080p high
310

2500k 4.4ghz Stalker C.O.P. DX11 1080p high
310

FX8120 4.5ghz Street Fighter IV 1080p high 0xAA
338

2500k 4.4ghz Street Fighter IV 1080p high 0xAA
338

Thanks for checking out the results. Hope you enjoyed.
 

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Pretty interesting numbers there. Thanks and +Rep for the effort and information. FX is a decent CPU and this proves it, however I'd like to see the power consumption data.
 

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Yeah the FX8120 looks really good in these tests. Couldn't you raise the BCLK on the Intel rig to 102? That would put the i2500k clockspeed @ 4.488ghz. Dunno if your memory could take it.
 

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These numbers look...different than all the other benches I've seen between the two.
 

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Quote:
Originally Posted by Ghooble View Post

These numbers look...different than all the other benches I've seen between the two.
Agreed. But since OP tested this, so it has to be legit.

@OP, you never described your Intel setup on the parts you were going to be using. You only stated AMD's (ASRock Fata1ty, etc). Would be nice to know the system.

Thanks for all the hard work! +1
 

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Nice results. I'm assuming these may be with the various fixes and patches over the last few months.
I kinda want to build a Bulldozer system for fun. I might just do that if these are universal results.

I would be very interested in your setup.
cheers.gif
 

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Discussion Starter · #12 ·
Thanks guys. Like I said the only thing that changed between setups are the cpu and mobo, everything else stayed the same. Specs for both AMD and Intel are listed in the original post. Might be a bit hard to read so I'll post cpu and mobo specs here and edit the original post to make it easier to read later on. And yes the FX-8120 had the patches installed.

Intel cpu: 2500k
Intel mobo: Asrock Z68 Extreme3 Gen3

AMD cpu: FX-8120
AMD mobo: Asrock 990FX Fatal1ty
 

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Hmm nice review, but what happened in heaven 2.5 benchmark? It's extremely GPU limited benchmark, and there shouldn't be that kind of perfomance difference between the two processors.
 

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Yeah I thought the heaven benchmark was a bit odd as well. I've tried my CPU at all different clocks and gotten the exact same performance. Something weird going on there with your runs.

Honestly no surprises with your results though really. The FX does well in multi-threaded synthetics and get's owned in games and lower/single threaded stuff.

Good stuff though.
 

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Quote:
Originally Posted by jtom320 View Post

Yeah I thought the heaven benchmark was a bit odd as well. I've tried my CPU at all different clocks and gotten the exact same performance. Something weird going on there with your runs.
Honestly no surprises with your results though really. The FX does well in multi-threaded synthetics and get's owned in games and lower/single threaded stuff.
Good stuff though.
its 8 core vs 4 core after all.
 

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I can chime in a bit and while Im still making sure its "stable" at 4.8ghz (it games and benches and does 1+hr stress before i shut down), i have so far noticed my heaven 2.5 score to be a few fps lower than my 1100T at 4244mhz. It could be my gpu driver though so Im going to be installing the same as the tested amount.

Intel 2500k max fps 120.x fps
amd 1100t max fps 120-126fps (I would get results all within that range)

Im notcing over time that its kinda like the negative FX-8150 reviews snowballed out of hand. EVERY site bad mouthed it, and i dont blame them, amd overhyped it, but in reality its solid at heavily threaded stuff and sometimes can take out the 2600k in those applications. I think AMD's weakness is gaming though and it clearly shows in the game benchmarks.

Personally in bf3 with my system, everything is identical except the motherboard and cpu, I lost stored data on min and average fps (deleted wrong drive, backup didnt have that on it) so can't compare but it "feels quicker" durring multiplayer gameplay, such as quickly turning around. I dont know how much of it is real vs perceived though. Core usage seems similar between the 1100t and 2500k too, both had 1 core around 70-85% while others lower depending on map, it does however seem that overall cpu use is lower on the 2500k but I havent cared enough to truely compare.

Overall Im happy with the change, had I dropped another 8120/50 (had one a week durring launch 4.6-4.9ghz) I would have always still wondered how the 2500k does. I think come ivy i might get the 2600k equivelent.
 
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