OK I spent some time after eating half a turkey testing the mysterious Super PI numbers on this board. My conclusion: 680i will be eventually faster than 975X, provided NV will perfection the BIOS. This board has so much potential in it and right now the buggy BIOS really rains on the parade this board deserves. See below my test results (and comparision with 975X) and you be the judge.

CPU: Xeon 3060 (E6600) @3.60GHz
Memory: Crucial 10 Year Anniversary DDR2-667 2GB (1GBx2)
Motherboard: P5W-DH (975X), EVGA NF 680i (680i)
OS: Windows XP (Base Priority set to 'High')

SP 8M

975X | DDR2-800 (3-3-3-8-2T) | 2m 54.860s

975X | DDR2-1000 (4-4-3-9-2T) | 2m 51.562


680i | DDR2-800 (3-3-3-8-1T) | 2m 53.922s

680i | DDR2-800 (3-3-3-8-2T) | 3m 02.922s

680i | DDR2-1100 (4-4-4-9-2T) | 2m 57.672s


SP 32M

975X | DDR2-800 (3-3-3-8-2T) | 13m 58.875s

975X | DDR2-1000 (4-4-3-9-2T) | 13m 47.641s


680i | DDR2-800 (3-3-3-8-2T) | 14m 28.187s

680i | DDR2-1000 (4-4-3-9-2T) | 14m 01.188s

680i | DDR2-1100 (4-4-4-9-2T) | 13m 56.078s


When I first got this board, I couldn't understand why the PI times were so slow on this board. It turns out the board's subtimings are way loose, not to mention that the BIOS is quite messy. But as you can see, this board has a huge advantage when it comes to memory. Not only it clocks memory better than 975X, but also gives much more freedom for users. To maximize performance, one can;
1) Overclock memory to sky high, or
2) Configure memory timings as tight as possible should the memory not be capable of high frequencies.
This board has a lot to be explored and has a lot going for it, IMO. I can't wait to see what DFI will bring to the table with the same chipset!