It was a rather harrowing weekend, but I'm back. I managed to at least get the sticks to work, but my computer ate my nVidia RAID driver diskette in the process and all the drivers on DFI's site cause errors during the windows installation... Dammit.
Dramatics aside, I've only managed to get 260Mhz at stock timings and stock voltage. At 265, I'll get 4-16 memtest errors per pass in test 5. At 270, I'll get a lot more errors, and at 280, forget about it.
I'm binned at 0603. Maybe I just got a pair of weak sticks? Dom, do you have a fan blowing down on your memory?