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Sapphire HD 7950 Vapor-X bottleneck

Last response: in Graphics & Displays
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November 3, 2013 10:53:17 AM

Hello everybody. I have recently upgraded my old computer. Bought a new GPU - Sapphire HD 7950 Vapor-X, also upgraded the CPU to Phenom II 1090T with new cooler - Thermalright Silver Arrow SB-E. However, the rest of components remains the same:

mobo: gigabyte ga-ma790gp-ds4h
RAM: 8GB DDR2 800MHz CL4
PSU: Corsair vx550w

This overall performance is unfortunately very weak:

This result of 3Dmark11 benchmark:
http://www.3dmark.com/3dm11/7425478

I also tried the passmark on this GPU and the results are very disappointing:
Graphics 2D - Direct 2D: 13.1 (Ati HD 5770 has 13.0)
Graphics 3D DirectX 10: 19.7 (Ati HD 5770 has also 19.7)

When I tested Crysis with its built-in benchmark, the results were also very bad. At one time the FPS was only 3 which I find very very low. I was thinking the PSU could be weak but the computer does not have symptoms of insufficient power supply. Any idea how to track the source of the bottleneck? Thx!

November 3, 2013 2:35:07 PM

Might be obvious but drivers could help.
November 3, 2013 4:10:43 PM

what were your cpu/gpu before the upgrade? is it an improvement over your old hardware? one thing to do would be to use driversweeper in safe mode to remove all traces of old drivers, then install the latest whql driver. I always do that if swapping different graphics cards.
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November 3, 2013 11:28:20 PM

xasylum: I reinstalled the whole system (Vista), only downloaded drivers from sapphire and ran the passmark, the same results. :/ 

iam2thecrowe: yes, this is upgrade over old hardware. I will try the procedure you suggest but still doubt there will be some improvement as the results were the same bad on fresh OS install.
November 5, 2013 2:04:35 AM

well your using vista......... thats a problem right there.\
install msi afterburner and check the clock speed of your gpu is reaching its rated mhz.
November 5, 2013 2:18:26 AM

You got the scores of benchmark.

Now overclock at least 10% and run the benches again.

If it gave a noticeable increase, then yes your CPU is the bottleneck.

Hope that helps. Good luck :) 
November 5, 2013 10:51:56 PM

Yes, the problem was Vista. I installed win 8.1 trial, left the drivers windows picked for my GPU and the results are much better. They are already the same as passmark says it should be: http://www.videocardbenchmark.net/high_end_gpus.html . Now when I play Crysis it's much smoother. Still when I run the benchmark, the FPS is still at the level of few units per second. It's called the CPU benchmark test so probably the CPU is the issue. :)  There are loads of explosions which probably computes the CPU. Still find it quite strange that this CPU is unable to handle game that is about 3 years older than the CPU itself. The resolution I have: 1920x1200, 8xAA and everything maxed out on very high settings. Or could the old mobo be the problem? I will try to overclock the CPU and then see where the problem resides. Ok, guys, thx for cooperation!
November 6, 2013 4:13:21 PM

ondra said:
Yes, the problem was Vista. I installed win 8.1 trial, left the drivers windows picked for my GPU and the results are much better. They are already the same as passmark says it should be: http://www.videocardbenchmark.net/high_end_gpus.html . Now when I play Crysis it's much smoother. Still when I run the benchmark, the FPS is still at the level of few units per second. It's called the CPU benchmark test so probably the CPU is the issue. :)  There are loads of explosions which probably computes the CPU. Still find it quite strange that this CPU is unable to handle game that is about 3 years older than the CPU itself. The resolution I have: 1920x1200, 8xAA and everything maxed out on very high settings. Or could the old mobo be the problem? I will try to overclock the CPU and then see where the problem resides. Ok, guys, thx for cooperation!


yeah, cpu benchmark is supposed to punish only your cpu. thats normal.
November 7, 2013 10:59:43 PM

My previous CPU was Phenom X4 9950BE and the results were the same which is quite odd taking into account that according to http://www.tomshardware.com/reviews/gaming-cpu-review-o... my current CPU is 4 tiers above the previous one. I will try to overclock and see if there's any difference.
!