What limits my 7950 ?

charmer

Honorable
Aug 18, 2013
477
0
10,960
Hello everyone, I own a sapphire HD 7950 vapor-x edition and was wondering what limits my card performance.
I OC the core clock to 1110mhz from 850mhz and the memory clock to 5500mhz and it's running under heavy load at 65°~69°.

When I OC and reached 1125mhz on the core clock I started seen artifacts and my PC rebooted so I downclocked to the current 1110mhz..

My question is what limited the performance on my GPU, is it the ~67° ,the build quality, some built in program that does it or the voltage limitation that people talk about in forums?

Thx in advance!


EDIT: My PC specs are in written below.
 
Solution
You can try 15-20% more power and see what sort of clock and temperature increases you get out of that. If the power and temperature seem disproportionate for the performance gain then dial it back and call that the best you are going to get.

InvalidError

Titan
Moderator
Your GPU may need a few extra mV to get it stable at higher speeds.

If you have already tried bumping voltages up then either the VRM or power delivery on the PCB is not clean enough for the GPU to operate reliably at higher clocks than that or the GPU die itself has a critical path that cannot go any further.
 

charmer

Honorable
Aug 18, 2013
477
0
10,960



well it did rise the voltage by 10% (as written in the "Power Target - 110%" - GPU Tweak).
Should is try rising it higher? because the 10% rise was done automatically by GPU Tweak.
 

InvalidError

Titan
Moderator
You can try 15-20% more power and see what sort of clock and temperature increases you get out of that. If the power and temperature seem disproportionate for the performance gain then dial it back and call that the best you are going to get.
 
Solution