What is the max safe Northwood Vcore

[flyer351]

Just wondering all,
I have a POS 2.53 P4 C1 that only does 2.85 reliably. What is the max Vcore that I can run without having to worry about NSDS? Thanks.

 

[PliotronX]

Somewhere between 1.65 and 1.7 actual volts. Best to keep closer to 1.65v and don't go by the setting in the BIOS, observe the measurement because some boards overvolt (Asus) while others undervolt.

 

[Duvie]

Originally posted by: PliotronX
Somewhere between 1.65 and 1.7 actual volts. Best to keep closer to 1.65v and don't go by the setting in the BIOS, observe the measurement because some boards overvolt (Asus) while others undervolt.

I agree with that and say 1.7v was fine with older bo stepping chips and that the 1.65v seems more right for the newer c1 stepping chips....What I have noticed is the c1 chips do less after reaching limit of default vcore and that higher vcore seems to be more sensitive with these c1 chips....Could be related to the hardware prefetching that was disabled on the b0 stepping chips....

If 2.85ghz was the best you could do at default vcore (actual not necessarily bios set) then you likely wont get to 3ghz even with 1.7v of adjustment....Maybe only 5-7 fsb more....