X5650@ 4GHz [1.34/1.35(?) vcore | 1.341 qpi v] after a fast/simple V-ray render:
5ºc difference.
cooled by old NH-D14
mboard: P6T dlx v2 with original P6T Dlx v2 BIOS
P6T Deluxe v2 doesn't alow offset voltage too.
Doesn't alow offset voltage neither can keep 21/22x 'turbo multiplier' on heavy load in 6 cores..
But now I 'flashed' P6X58D [premium i think] BIOS and now I have offset voltage..
Still, doesn't alow 22x multi on heavy load on all cores.
With a P6T WS bios I could keep 22x multiplier all time/full load in 6 cores, but I'll lose offset voltage.
I prefer offset voltage for 24/7 use.
Warning:
Flashing BIOS from different Mboards may 'burn' your Mboard.
I'm not responsible if you burn your board.
I only read and tried this procedure for P6T Deluxe v2, I don't know if it works with different Mboards.