Here's mine for reference:

Core speed - 1125mhz
Mem speed - 685mhz
Voltage - 1112v (stock)
Temps - ~50° (water cooled)
Hash speed (avg) - 650
Flags - None
Miner - Default GUIminer (poclbm)


I find the biggest factor to optimum hashing power is what driver you use. I am pretty sure i am on 12.8 as anything newer doesn't seem to be as good.

I also used to have 4x 5870's mining in a dedicated rig I set up. I had a low end AMD sempron (by recommendation) but found this was bottle necking my hashing power. I upgraded the CPU and all was well. I thought this would be worth noting as I don't know what the rest of your rig is.