my xfx 5830 has been running for 3 weeks at stock voltage 400mhz memory and 1ghz core. never goes over 68c i only get 300mh/s though with phoenix with phatk.
edit: tried worksize 256 and i got 10mh/s more! weird poclbm gave me less with ws at 256.
sweet... I hope I can do the same. ill be very happy if I can get 300mhs out of each of them 24/7 with no issues..