I have read the official/sticky thread on overclocking intel cpu's and it mostly makes sense however when it comes to using my bios to follow those instructions I'm stumbling in the dark a bit. I'm hoping you guys can help me out.
I have an Asus P5N32-SLI (I know not the best choice for overclocking but to be honest I'm not looking to push my hardware to the limit - thus no water cooling - I just want to give it a go, nice and slow). I have the latest BIOS 0901. This MOBO should do FSB 1066 and/or 1333 (in the few attempts I have made I did get 1333 stable)
I have an E6750, on spec it should run @ 2667mhz (1333 FSB or 333 x 8.0) @ 1.35v but it's currently @ 2133 (1066 x 8.0) @ 1.296v. I have managed to get it running at spec but I can't seem to get it and the memory there at the same time.
I have some Crucial Ballistix (D9GMH chips) ram which should run either:
4-4-4-12 @ 400mhz (tRC:24T CR:2T tWR:6T)
5-5-5-15 @ 500mhz (tRC:30T CR:2T tWR:8T)
both @ 2.2v but are current at:
5-5-5-18 @ 400mhz (tRC:23T)
CPU, Coolermaster Hyper TX heatpipe cooler. 1 large front case fan (Coolermaster Centurion 532), no rear. Silverpower 600W PSU with large fan. Crucial ram has heat spreaders. I've been as tidy as I can with cables.
XFX 8800GTS "XT", 560mhz clock
Now for the BIOS options, this is where I get confused. I have tried a number of things but often when I think I'm being gentle with my overclock it fails to boot, or hangs while booting (that has happened twice) so I think I am missunderstanding something fundamental here.
You could download the manual here:
But here are the settings I think are important...
AI Tuning [auto, manual, standard, AI Overclock, AI N.O.S]
(w/ AI Overclock)
Overclock Options [disabled, 5%, 10%, 15%, 20%,
(w/ AI N.O.S)
N.O.S Options [disabled, 3%, 5%, 8%, 10%]
NB PCIE Frequency 
SB PCIE Frequency 
FSB Turbo [disabled, enabled]
MEM Turbo [disabled, enabled]
System Clock [auto, CPU precision, cpu-mem manual, Mem precision]
(w/ cpu-mem manual)
New FSB Speed  can enter (1056 - 2100)
Current FSB Speed 
Target FSB Speed 
New MEM Speed  can enter (400 - 16000)
Current MEM Speed 
Target MEM Speed 
VCore [auto, 1.225 thru 1.6]
Mem [auto, 1.8 thru 2.55]
1.2v HT [auto, 1.2 thru 1.35]
CPU VTT [auto, 1.2 - 1.55]
SB [auto, 1.5 thru 1.65]
NB [auto, 1.4 thru 1.75]
vcore over voltage [disabled, 200mV]
PEG Link Mode [auto, disabled, normal, fast, fastest]
SLI Ready Memory [disabled, mem max, 0% thru 5% CPU OC, CPU max OC]
Finally, a bit of searching in the ASUS forums turned up this example, on the same MOBO, different CPU, different RAM, and water cooling though so it's not exactly what I would be expecting to get.
i run at 350mhz fsb daily on intel 6420 C2Duo.
Maximum achieved is 1440mhz `360mhz with all volt settings at maximum..
My hardware is:
Asus P5N32SLI Premium
2 X 512 DDR Geil 667 cas 3 run @ 1066mhz 2,35v
Water cooling kit Corsair
Silverstone Zeus 650W power suplly
3 X 320 WS JS raid 0
NB PCIE Frequence 
SB PCIE Frequence 
FSB Turbo Mode [Enabled]
MEM Turbo Mode [Enabled]
System Clock Mode [CPU/MEM manual-mode]
FSB Speed 
MEM Speed 
Vcore [1.5000] Procesor voltage
Memory [2.35V] Memory voltage
1.2 HT [1.35V] Hypertransport voltage
CPU VTT [1.45V] FSB Voltage
SB Core [1.50] Southbridge Voltage
NB Core [1.70] Northbridge Voltage
VCore Over Voltage [Disabled]
I suspect I should concentrate on "CPU/MEM manual-mode" and ignore the AI overclock and N.O.S options.
I have CPU-Z, Orthos Prime and Everest ready to stress test. Let me know if there is any more info you need... this post is big enough it should have everything
Helooo.. Is there anybody out there..