Hi all,
I'm really stumped at this new crossfire setup.
Here's my specs:
AMD FX 4170 @ 4.2GHZ
2x Sapphire Radeon 7950's factory clocked to 925/1250 memory
16gb DDR3 Ram @800mz
750 Powerwat supply
120mm liquid CPU cooling
I bought the second 7950 after seeing many reviews that the FPS was almost doubled in games like BF3, etc while running in crossfire. I havent been able to get much of a performance increase at all except for in 3dmark, and I'm wondering if this forum can help. I also see a problem that I can't seem to fix with GPU-Z displaying different drivers. I actually am receiving worse FPS in BF3 with 2 7950's than with 1, but 3d mark scores shot to 14k graphics and 9400 overall with crossfire from 7200 overall with just 1 7950. So stumped.
Heres the GPU problem that I noticed with the drivers:
http://gpuz.techpowerup.com/12/12/05/28k.png
http://gpuz.techpowerup.com/12/12/05/cex.png
See the different drivers and allowable bus width / bandwith? Strange. I have went to device manager and clicked update driver for both 7950's, as well as looked at the details, and the drivers say the same.. But GPU-Z says differently. Also, in AMd overdriver, when I look at the second card, I don't get any temperature readings, mhz readings etc. It just says 0 for everything.
But msi afterburner shows both cards being utilized basically equally during 3d mark. Soon as I load BF3 however though, FPS is horrible and spiky. Often, it will spike from say 40 fps down to 0 out of nowhere, then straight back up. But the FPS overall is worse then with just 1 card. I also noticed that the spikes occur much more around explosions, and in empty servers, the FPS might be slightly better in crossfire than with just 1 card. But as soon as u throw explosions, the FPS goes to spiky garbage. Is there possibly a memory bottleneck for me with running 2 cards? Please help as this is very frustrating!!! How can my 3d mark score nearly double FPS (from like 22 to 38 in different tests) but hurt my BF3 fps? Either way something feels astray considering the GPU-Z driver reading.
Best,
Dan
I'm really stumped at this new crossfire setup.
Here's my specs:
AMD FX 4170 @ 4.2GHZ
2x Sapphire Radeon 7950's factory clocked to 925/1250 memory
16gb DDR3 Ram @800mz
750 Powerwat supply
120mm liquid CPU cooling
I bought the second 7950 after seeing many reviews that the FPS was almost doubled in games like BF3, etc while running in crossfire. I havent been able to get much of a performance increase at all except for in 3dmark, and I'm wondering if this forum can help. I also see a problem that I can't seem to fix with GPU-Z displaying different drivers. I actually am receiving worse FPS in BF3 with 2 7950's than with 1, but 3d mark scores shot to 14k graphics and 9400 overall with crossfire from 7200 overall with just 1 7950. So stumped.
Heres the GPU problem that I noticed with the drivers:
http://gpuz.techpowerup.com/12/12/05/28k.png
http://gpuz.techpowerup.com/12/12/05/cex.png
See the different drivers and allowable bus width / bandwith? Strange. I have went to device manager and clicked update driver for both 7950's, as well as looked at the details, and the drivers say the same.. But GPU-Z says differently. Also, in AMd overdriver, when I look at the second card, I don't get any temperature readings, mhz readings etc. It just says 0 for everything.
But msi afterburner shows both cards being utilized basically equally during 3d mark. Soon as I load BF3 however though, FPS is horrible and spiky. Often, it will spike from say 40 fps down to 0 out of nowhere, then straight back up. But the FPS overall is worse then with just 1 card. I also noticed that the spikes occur much more around explosions, and in empty servers, the FPS might be slightly better in crossfire than with just 1 card. But as soon as u throw explosions, the FPS goes to spiky garbage. Is there possibly a memory bottleneck for me with running 2 cards? Please help as this is very frustrating!!! How can my 3d mark score nearly double FPS (from like 22 to 38 in different tests) but hurt my BF3 fps? Either way something feels astray considering the GPU-Z driver reading.
Best,
Dan