I have them overclocked to 950-960 and ram set at 240
fans running at 100%
one of the reasons i want to watercool them is to get them quiet.
Are you sure everyone is talking about the same thing here?
My MSI Reference 6970s can NOT hit 950mhz stable without overvolting, and their stock clock is like, 880 IIRC. They can't even hit 920mhz at stock voltage. I get a solid 400mh/s at 910mhz.
Also, downclocking the memory below 300mhz
always causes hard-lock. How in the hell did you manage to get it down to 240?
I have 2 XFX CNFC 6970's (crossfired for gaming)@ 935/1375,PCS @ +20 (fan @ 85%,temp 70-73c with 3 80mm helper fans)& get 425 mhs from each.When OC'ed like that my whole rig uses 720 watts(using Kingwin 800 watt).I'm not OC'in anymore till I upgrade my PSU to 1000 watt or more.
No luck for me either with downclocking mem so I left it @ stock
I would think 1500 watts would be cutting it too close for 5 of these,escpecially if OC'ed.