Originally Posted by E-Peen
Sounds good. I'm going to try for 1250 memory, see what happens. If I get no errors/artifacts I'll stop right there for memory and start doing the core.
Then the gaming/tweaking begins
Quick question!: Is it okay to have other windows over a stability test such as Furmark? Or does it need to be the foreground and uninterrupted by other tasks?
You should work on the core clock first IMO; it's going to give you more performance in contrast from what you'll get on the memory.
I'd suggest just keeping the memory at stock while you push the core, then bring it back up to about 1200 and work from there.
The memory on 5850 and 5870 are identical, so 1200 is typically a pretty safe bet for stability (prior to ECC correction).
In regards to your testing software, you should keep it in the foreground simply for the fact that you'll want to monitor it while it's running.
Whether that be looking for artifacts or keeping an eye on performance while adjusting memory; having another window over it won't harm anything - but you will want to keep close eye on it though.