Retail Q9650 Overclocking Thread

[Hoss331]

There is a difference between 'max' and 'absolute max' vcore.

Max = 1.3625v

Absolute max = 1.45v

If you read the portion of the data sheet I have quoted below, it states that the max voltage is the functional limit of the processor. The absolute maximum voltage lies outside the functional limits of the processor, and long term reliability will be affected to some degree with the severity determined by the length of exposure to these voltages. If you go beyond the absolute max voltage, the processor may not function anymore, or will have it's reliability severely degraded.

We know the CPU's will still function after excursions above 1.45v, however we have no idea how badly they have been damaged. I have benched my E8600 at 1.56v on air for hours with no obvious ill effects.

It should be clear that 'safe' vcore = no more than 1.3625v

Ive read that before, but what gets me is that listed 1.3625 is the max VID, which is not vcore.

[Falkentyne]

Ive read that before, but what gets me is that listed 1.3625 is the max VID, which is not vcore.

VID is the voltage identification register, which tells the motherboard what the voltage it is supposed to set for that chip. Every individual chip has a different VID. So in a way, Vid "IS" Vcore in a way. One Q9650 might have a 1.15 vid while another has a 1.3 vid. This is just what the motherboard should give the cpu at auto vcore, if the bios works correctly.

Max vid is basically saying what the max possible vid can be for that particular chip range. And I think "manual" vcore settings override that.
But you're pretty much able to raise voltage up to the highest vid range for the processor line without risking any damage.

[bigwill68]

But you're pretty much able to raise voltage up to the highest vid range for the processor line without risking any damage.

that's the same for the 65nm chips also right? even they max out at a higher voltage of 1.5v not 1.362v like the 45nm do... i'm just asking everybody knows more voltage comes more heat and that's what kills a cpu it's like running a engine in a car with no antifreeze or bad thermostat the block will
crack and lockup the same with these cpu's and heat produces wear and that produces short life...

Finnaly Sold Old Dirty DFI

Congrats...I wish I could sell some old parts and mb's and whole computers i got laying for some new things..I need
what's the trick to do that ViViD?