Can't post in the hardware section yet..
I'm currently running my HD6850 at 925/1150 and I get 230-235 Mhash/s. If I lower the memory clock using MSI Afterburner, my hash rate drops correspondingly. If I go all the way down to 300 Mhz, my hash rate drops to around 160 Mhash/s. I have tried tons of different memory clocks in steps of 50-100 between 300 and 1150 and a higher memory clock always gives me a significantly better hash rate. What's up with that? Seems like I'm the only one experiencing this problem.
I use Diablominer with -v 19 -w 128 (gave me the best performance) and -f 30 (so I can play games if needed without closing my miner, when not playing games this setting does not affect my performance).
Anyone know what's up? I'd like to be able to underclock my memory without destroying my hash rate.