P5n D Q9550 Overclock 3 4g Stable

hi ,everyone, i comeback and report some data for ASUS P5N-D and Intel q9550 overclocking some data.


steps:

CLOSE some CPU energy efficiency first, under the CPU option.

3.29G overclocking setting:
unlink,
Fsb=1600,
ram=387(775),
CPU voltage not change:auto or 1.28v,
NB voltage:1.24v,
HTvoltage:1.22v.

3.4G overclocking setting:
unlink
fsb=1600
ram=400(800)
Cpu voltage:1.34v,
NB voltage:1.44,
HT voltage: 1.32.

i test around 6 hours by OCCT and CPU Hot software. it's very stable. but need strong cooling system. i using Coolermaster water cooler(aquagate max), cooler control the temperature under 50C(full). i will carry over 3.6g. 3.8g next week, after buy NB cooler later

anyone can tell me max NB/HT voltage? thanks..