Graphics Problem !

[technojunky]

I recently had a few problems with my PC that I thought were related to the XFX 7900GS 256MB Extreme graphics card. I therefore bought a second-hand BFG 7900GT 256MB on Ebay to see if it would solve the problem.

I installed the 7900GT (which is supposed to be a superior card to my 7900GS) and ran 3Dmark06. The 7900GT scored 4847 on the standard 3dmark06 settings compared to 5435 scored by the 7900gs. I have run the test on both cards twice with similar results.

Could this mean that the BFG 7900GT 256MB is faulty ?

Any helpful advice would be much appreciated.

Thankyou.

 

[technojunky]

Thankyou for the posts.

Yes, the XFX 7900GS is the Extreme version. Both cards have 256MB of memory.

I ran GPU-Z on both cards and the difference in results were quite astonishing :

7900GS 7900GT

Memory Size 256MB 256MB
Memory B/W 51.2GB/s 43.5GB/s
GPU Clock 600MHz 475MHz
Memory 800MHz 680MHz

Despite the fact that the 7900GT has 24 pipes and the 7900GS only 20, am I right in assuming that the higher clock speeds of the 7900GS Extreme is the reason for the better score in 3DMark06 ?

I found that the 7900GS was getting very hot in my system and causing it to preiodically to shut down. I therefore bought the 7900GT to verify that it was definitely a problem with the video card and not something else in the system.

Thanks again for the posts.

 

[technojunky]

Thankyou for the reply fraps.

I couldn't believe the results when I compared them, perhaps that is why the 7900GS gets so hot !

I run the ATI tool and post the results.

Thanks again.