Heres quick comparo (pretty sure longer bench will yield same results).
Mobo retail BFG N680i unmoded, NB watercooled and SB with fan (its an old MSI Neo2 NB hsf)
2X1GB TeamXtreem 8000C5
ATI Rage Pro
Zippy P6850 850W
FSB 1492 and mem @1066
FSB 1825 and mem @1318
Heres info from a friend guess2098...with Asus striker and Gskill 6400HZ...
1699FSB (424.7) fast 32M
1700FSB (425) slow 32M
