Chucked the 1901bios on.

Still the same performance, can't see any difference.
At least it keeps the speedingHDD raid drives alone, didnt mess that up phew!

Ive tried those ram settings before, but the thing didnt boot with bios 1307. its only value set of 8GB at DDR2-800. I can't be bothered with cmos resets, there's too many options to change all the time.

Just one thing, with 400FSB, what's the adequate voltage for

FSB
NB
SB 1.5
SB 1.1

Just take into account there is 8GB installed.
Currently its set at

FSB = 1.36xxx
NB = 1.36xxx
SB = 1.66xxx
SB = 1.36xxx
Running kinda warm though.