i7 3970x @ 4.5 Ghz with 1.4013v - 1.4061v

Understocked · Jul 8, 2015

Hi all

As the title suggests, those stats are what I got after running prime 95 for like 2 hours, the max temp is 73.

Yet many people on ROG forum suggests i7 3970x should not exceed 1.400v when overclocking.

Also when I was overclocking @ 4.2Ghz it never goes beyond 1.390v.

Should I offset it to make it below 1.400v?

Toothless · Jul 8, 2015

Normally anything above 1.4v starts causing damage. Keep it below 1.4v.

Understocked · Jul 8, 2015

BTW I forgot to mention the 1.4013v reading was from the VID section on CoreTemp, when it was on full load 100%.

Also somehow I cannot seem to drop the 1.4013v... I tried changed the Vcore manually but it doesn't seem to affect the reading of VID on load.

fullinfusion · Jul 8, 2015

Personally that older CPU should be able to handle 1.42ish all day long.. The newer chips yes keep below 1.40v but I'm sure you'll be fine as long as its able to keep temps at a reasonable level.

hat · Jul 8, 2015

Check CPU-Z? It's best to have multiple tools sometimes. It may be best to scale it back a bit, Is the 300MHz worth risking damage?

Aquinus · Jul 8, 2015

VID is not the same thing as core voltage. The VID voltage is the voltage output by the VID logic which then gets used by the VRMs to produce your core voltage. You can go over 1.4v on the cores but, you'll want to make sure the CPU is running cool. You probably shouldn't go any higher than 1.45v if and only if temperatures are reasonable. 1.35v+ is required for me to hit north of 4.2Ghz on my 3820. What you're getting sounds pretty normal to me. It's possible that your overclock is unstable if you haven't adjusted the VTT voltage or the PLL voltage. I usually ran 1.85-1.9v on the PLL for higher BCLKs. Since the 3820 can only do 4.2Ghz on boost, it could be possible that higher clocks (not just the BCLK strap,) may want more voltage on the PLL.

Could you take some BIOS screenshots of your overclock? It would be helpful to see what are you're setting are.

Ferrum Master · Jul 8, 2015

No problems, mine runs the same, albeit 3960X. It runs on 4.8GHz... as it is a 32nm sandal... It can handle it, and it reaches only it when firing up on maximum and vdroop regulation kicks in... 1.39V it is not stable for me... mine runs past 5Ghz on 1.46V, but I cannot manage the temps, it needs water then... funny on 4.8Ghz my ancient megahalems keeps it under 80C Max on heavy load... it means in real life scenario ie gaming... it doesn't even reach 60, my cpu fans doesn't even activate on max.

It seems you have disabled speed step and C states, leave the first state ON, and let the CPU breathe while not used...

Also, do you use offset voltage setting or adjust the VID?

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i7 3970x @ 4.5 Ghz with 1.4013v - 1.4061v

Understocked

Toothless

Tech, Games, and TPU!

Understocked

fullinfusion

Vanguard Beta Tester

hat

Enthusiast

Aquinus

Resident Wat-man

Ferrum Master

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