well the 980i has the performance akin to 975 under 1699qfsb, over that you get the performance of the 965 chipset.
Shamino at vr-zone has already said that the 980i is slighlty faster at superpi than the RD600.
For air/water clocks it's hard to notice the differnce really, other than a few points here and there.
The 975 boards that can hit 445fsb are still hard to beat for price and perfomance.
Even still I'll get a rd600...
I have the striker and I must say Ilke a lot about the board physically, but I must sy that performance over 1699fsb in no way justifies even 75% of the price tag.
regards
Raja