A few questions, mainly about temp. [i7 920 4 Ghz]

[jedimasterben]

Is your RAM running out of spec? And even with upping the VTT, I think 1.35 vCore is a bit low for most i7s to hit 4. I'd run it up to 1.4v. Do you have HT enabled?

 

[cythx]

I have always had HT enabled.

I havn't changed my RAM settings besides the multiplier and I will be testing my system with higher vCore but why can everyone else get much lower vCore even though I have a D0 aswell, does the motherboard make that much of a difference?

 

[jedimasterben]

Yes, it can, and every single chip will clock and behave differently. Just because it is in the same series, stepping, and even if they are from the same batch, doesn't mean that they can reach the same clock speeds at any voltage.

 

[cythx]

Thought you'd say something like that;;

I just ran another Prime95 with different voltages, temps were better but Prime95 stopped working 20 minutes in.

Is it possible I'm just experiencing higher temps because my computer's been on longer then when I had started from a cold boot yesterday?

I still don't understand why my idle temps are 10 C higher :/

 

[jedimasterben]

I don't know, either. That just doesn't make any sense. Are you looking at overshocked's guide? It should tell you what voltages you can bump up to get it stable.

No, it shouldn't matter how long it has been on, idle temps should stay the same as long as ambient hasn't really changed.

 

[cythx]

I have bumped those up already :/ I'll check tommorow morning and see if they change back.

Maybe I should ask Overshocked P:

Hopefully the new compound Im getting next week will help some.

 

[cjl]

Irreparable damage is done to the CPU around 100°C. 80° is a good absolute max temp, and 70° is great, especially if you have HT enabled. Have you read overshocked's guide on OCing the i7 9xx's? You may be able to lower your vCore even more by upping VTT a bit.

Here's his guide (he's a great guy, btw, very very helpful if you have any questions): http://www.tomshardware.com/forum/253365-29-core-overclocking-guide

Irreparable? Nope. 100C is where Intel's thermal protection kicks in. I've had my 965 up that high before with no harm at all (it was part of installing the thermal compound). I wouldn't want my CPU running consistently that high, but there is almost zero chance of damage from short periods of extremely high (100C) temperatures.

 

[jedimasterben]

Irreparable? Nope. 100C is where Intel's thermal protection kicks in. I've had my 965 up that high before with no harm at all (it was part of installing the thermal compound). I wouldn't want my CPU running consistently that high, but there is almost zero chance of damage from short periods of extremely high (100C) temperatures.

Yes, short periods are fine (my last Xeon hit 110 when I didn't seat my heatsink properly), but it were to somehow sustain that temp, it would pretty much horrible.

 

[cjl]

Yep. It vastly increases electromigration, in essence aging your CPU at many times the normal rate. This is especially bad if your voltage is above stock, as that also increases electromigration - the combined effect of overvolting and severe overheating is much worse than either independently.