Mine came today, and after about an hour and a half of tweaking, I just can't get this memory to perform as well as DDR500 should.
I set 250fsb with a 1:1 ratio, default voltage to the CPU, 2.8v to the memory, left the memory set to 'SPD', and left the GAT(PAT) left on auto, which probably is disabled.
Ran Sandra, and got an aweful 5565MB/s memory benchmark.
Tried using a GAT mode of Turbo, and had to reset my CMOS, as it alarmed on me.
-So I got back up and running where it was last stable, and tried Turbo again, but turned off CPC and all the usual tricks.. -Had to reset the CMOS again!! BAHHHH!!
Okay..hmm.. maybe I'll try for more MHz out of the memory.. So I get back into the Bios, and try 255fsb with 1:1 ratio..no alarm! So I'm pretty stoked now, as 5MHz more with a 1:1 is actually a pretty nice improvement in performance - well at least for benchmarks. Run through Sandra again, 5650MB/s. Better, but still doesn't touch my Corsair, which does over 5700MB/s, with Street Racer GAT settings..
In a nutshell, this memory doesn't perform as well as what I've got now, so it's going back.. If I could run GAT, my performance would probably be better, but I tried all the tweaks and tricks I could think of.... and I'm pretty sick of resetting my CMOS everytime my memory craps out.
Thumbs down from me, which is too bad..