OK, I got round to replacing all the paste on my motherboard with OCZ freeze and my system temps dropped by 10°C, so my system temps are what they should be. So with that little mod heres is my new overclock running for over 72hrs and still going.

Model: 9850 BE (B3)
Batch: JAAFB AA 0812 BPCW
Frequency: 3117.66
Vcore: 1.275
Motherboard/chipset: Asus M2N32-SLI Delux/NVIDIA nForce 590 SLI
Cpuid validation url: http://valid.x86-secret.com/show_oc.php?id=409432
Cooling: Air (Scythe Mugen)

But no matter what I do I just can not hit 3.2, looks like I need the new 790GX with SB750 I think.