I'm running a 6950 on Linux with the latest fglrx, and I've used RBE to unlock the shaders and increase the clock to 900 MHz.
When I start poclbm, the hash rate climbs to around 410 Mhps during the first few seconds, then drops down to about 353. According to my sloppy math, I should be getting something like 385 with these tweaks, so I'm wondering what the problem is...
Are my expectations too high, and 350 is right, and the brief display of 400+ Mhps is incorrect?
Could the card be throttling itself for some reason? It's not overheating, the temperature stays around 68C with the fan at 75%.
Could the shaders not actually be unlocked even though RBE says they are? It's this 2GB MSI card
which is supposed to be unlockable. Is there a way to check how many shaders are active without installing Windows or moving the card to a Windows box to run GPU-Z?