hey people, i've bought a month ago an XFX Radeon HD 7850 and i put it to mine.

As anyone would i've overclocked it to the max overclock AMD Catalyst control center allowed me to, and i got a 315 hashrate using Diablo's GPU Miner ( https://bitcointalk.org/index.php?topic=1721.0 ). I have a Phenom II X6 which i put to mine too to have a little HR increase, using Pooler CPUMiner ( https://bitcointalk.org/index.php?topic=55038.0 )

Tho, one day just for messing around i overclocked the CPU through the BIOS and another day i started messing around with the MSI Control Center, long story short: i've found out that after overclocking through raising the FSB on the BIOS to 222 MHZ and then lowering through the MSI control center close to the default value i had an HR increase from the GPU from 315 MH/s to 344 MH/s. Why does it happen? i have no idea, but it happens.

Now, if i lower the FSB frequency below 204 mhz, system crashes.

This is my experience, if anyone wants to give it a try do it at your own risk, i've been like this by 2 weeks now and it's stable and my computer works normally so far.

Another setting i made at the CCC, was to manually set the fan at 99% and as a little precaution, once i close Diablo Miner, i let the fan cool the GPU for a few minutes before turning off the computer.

Just that, my contribution