Quote Originally Posted by macci View Post
At least the 3DM2001 Nature and fillrates were scaling nicely from 990 to 1010 with the default BIOS (even though the timings are auto-adjusted at 1GHz). I got the best score so far at 1143MHz memory clock for that benchmark.
Could be different in 3DMark06 and 05 though - need to do more testing.

There is a fairly big drop in performance when you pass 833MHz Memclk. Memory timings are automatically adjusted @714, @833, @909 and @1000. The change @833 seems to give the biggest performance impact.

The test runs @950/980 have a custom VBIOS which keeps the memtimings at default ("714MHz timings"). It takes around 900MHz with these timings to match the default timings @980MHz.
oh it nice so it very nice if you sharing it (bios) he..he...