First, here's my specs:
Gigabyte Motherboard, model # EP35C-DS3R(BIOS version F3e)
Intel Core2 Quad, Q9450 processor
ThermalTake Silent 775D CPU Cooler
BFG Nvidia GeForce 9800 GX2 graphics card
Corsair XMS2 RAM (4096-6400, 800MHz, 2 X 2GB)
Cooler Master Full tower HAF Case
Windows XP Pro, SP3
The Q9450 - as I'm sure you already know - is rated at 2.66GHz.
I've been OCing this processor for about two months now at 3.2GHz; I set the CPU Host Frequency to 400Mhz.
I had showed someone a screen shot from the software known as "CPU-Z", and the Core Voltage was getting readings of 1.4V. They said this was a little too high, and that I should adjust it manually. So I went in and changed "Auto" to "Manual", and then adjusted it.
As I'm sure you also already know, the maximum that Intel suggests for the Q9450's VID voltage is 1.36250V.
My motherboard's normal CPU Vcore is 1.25000V, and I tried manually adjusting the voltage to this setting of 1.25000V, but I couldn't boot into Windows. So I kept upping the voltage bit by bit til finally I arrived at 1.32500V.
So for about two months I've been at 3.2GHz and 1.32500V running stable. I've run Prime95 and 3DMark06; it's been stable and good temps.
Then all of the sudden, the other day, my system won't post and I have to go in to the BIOS and make adjustments so I can boot into Windows.
Any ideas as to why my system suddenly wouldn't boot on this overclock I've had for two months? I made no changes to the system in this time.
And is it truly dangerous to leave my motherboard's voltage on "Auto"? Is it putting out too much juice....so much so that it might actually hurt the processor chip?
Thanks for any input or suggestions. I'd sure like to get that 3.2GHz back (or higher if you have suggestions on how to do it!!).