apparently the 68XX are more effecient on power/hash than the 58XX series.
More efficient of power but less efficient in hashing so 58xx series = greater profit still.
5830 / 5850 is sweet spot. I have 4 more 5830s unopened waiting for a mobo and junk... and then I'll have 8 of them mining at about 2600 mhash
How do you achieve 325Mhash/s on multiple 5830s? Like, how's your cooling set up? I'm assuming you're running them at a tad over 1GHz core and around 300-340MHz memory? That's what it would take for mine but the temps aren't comfortably sustainable so I ease back a bit. Using phoenix 1.6.2/phatk2 on linuxcoin btw
I have 1020 / 320 mem and aggression at about 8 or 9 with fans at 80% and they have been stable
This is in a FULL tower antec 1200 case with plenty of airflow in an air conditioned room. Cards stay at about 70c