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Benchmarks: i7 Overclock/HT Performance Scaling

post #1 of 27
Thread Starter 
I decided to run some tests with my new GTX 570 but it turned into cpu overclock scaling tests. Enjoy.

Test System: *also see sig

i7-930 @ (2.8, 3.36, 3.8, 4.2) with and without hyperthreading
Gigabyte x58A-UD3R
EVGA GTX 570 SC
6GB G.Skill @ 1600
500gb WD black

Methodology: I tried to keep everything as consistent as possible. Every time I would dial in a new processor clock I would load up windows and let it sit a few minutes until it seemed all start-up processes had stopped. I then opened my usual monitoring software ie: realtemp, Fraps, etc. Some of the tests gathered their own min/max/avg data and I used that while other programs I used fraps to gather my own data. I ran each test three times and took the average of that data.

*I've also included a spreadsheet of all the data I gathered including min/max/avg fps scores. I will only show the total average scores here.

3dmark11average.jpg
CrysisGPUAverage.jpg
CrysisCPUAverage.jpg
MafiaIIAverage.jpg
Starcraft2Average.jpg
LostPlanetAverage.jpg
HeavenAverage.jpg
AvPAverage.jpg
Edited by DBEAU - 1/1/11 at 4:20pm
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post #2 of 27
Good job (+rep).

I wonder why turning HT off at 3.8GHz would generate lower performance for a majority of the graphs?
post #3 of 27
Thread Starter 
I really can't explain it, it's very weird. What struck me most odd is that on the crysis bench, 3.36 got a higher score than 3.8.

And apparently 3dmark is the only program that takes advantage of hyperthreading.
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post #4 of 27
wow, it looks like alot of games dont like hyper threading. +1
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post #5 of 27
Kinda discredits 3Dmark.
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post #6 of 27
Thread Starter 
It makes you wonder though... If all these other games would take advantage of hyperthreading would they perform significantly better?
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post #7 of 27
They can't take advantage of hyperthreading because most aren't even using four cores to begin with. If it does take advantage of HT you lose performance because instead of using one of your four physical cores it's trying to send two threads down one core which results in a performance loss.
    
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post #8 of 27
Thread Starter 
Well by "take advantage of HT" I meant that it was properly optimized to do so and theoretically it should increase performance.
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post #9 of 27
Why would it improve performance?

It can only improve performance if four cores would be fully saturated, that is not the case today, and that improved performance would be destroyed by having eight physical cores/threads.
    
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post #10 of 27
very insightful, thank you very much for this
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