Whats a safe voltage for C2D oc'ing?

[Cheezeit]

Hey guys,

I have my C2D E6400 running at 3.2ghz on 1.35v. I'd like to push for 3.5ghz or more, but I'm not sure what the safe limit for voltage is. What should I set Vcore for if I want this computer to last 4 or more years?

TIA,
Darren

 

[myocardia]

Vcore kills cpus much, much more than high temps. For 24/7 use, you're fine up to around 1.45-1.475v, in the BIOS.

 

[The-Noid]

1.6

 

[Extelleron]

Originally posted by: Yoxxy
1.6

1.6V is pushing it IMO if you plan on keeping the processor for a while. You'll probably be fine, but who knows. People pushing the Northwood's over 1.7V didn't think it was a problem either. Overall I wouldn't push a 65nm CPU up to voltages like 1.6V, but that's your choice. If you do decide to, make sure you cooling is up to snuff.

 

[myocardia]

Originally posted by: Extelleron

Originally posted by: Yoxxy
1.6

Overall I wouldn't push a 65nm CPU up to voltages like 1.6V, but that's your choice. If you do decide to, make sure you cooling is up to snuff.

Yoxxy has phase change cooling, he doesn't have to worry about having enough cooling.:laugh:

 

[Cheezeit]

Do you guys agree that 1.45-1.475 is a good place to set vcore to if I want to keep this rig for a while?

 

[Cheex]

I agree.

Personally, the highest I would take mine is 1.5V and I have a Tuniq Tower 120 cooling it so your cooling solution is also something that should be a major factor in deciding how much voltage to run through your CPU on a 24/7 basis.

 

[Roguestar]

I'd like to keep it at around 1.4V just to keep it cool and preserve the longevity of the processor itself. The highest I ever took mine was 1.375.

 

[nealh]

Jeez, this is asked a thousand times

No one knows for sure

Intel papers state max vcore is 1.55v(but they alsos say at this voltage the cpu may have issues running stock speed and vcore if place again at those levels again)...I do not have the link handy but I have posted before here and XS(as have many others) the Intel specs

Safest vcore is stock..but this if you want to keep the cpu for years(many believe a cpu at stock will have a life of 7-10ys(who needs a C2D then??!!)

I think if you keep temps good on air cooling...under 70C??? I would say max 1.55v, watercooling 1.6v, Phase maybe 1.65v

What I can tell you from what I have seen is 1.65v, is a NO-NO..this has lead cpus to "degrade" supposedly with in a week...I do not recall a true death

Others have reported 1.55-1.6v may have lead to degradation of the OC with long term use(FWIW, at XS you can find many more running these vcores with 0 issues)...the problem is no set a standard for how you test an OC, so the reality is that many of these OCs were not really stable and the issues showed up later

I tried todefine a stable cpu as 8-24hrs Prime95/orthos stable, memtest and 3Dmark stable.....and
I asked recently at XS for someone to show me a cpu that had gotten 1.6v and was 8-24hrs prime 95/orthos stable that degraded(I doubt unless you are exceeding 1.7v on air you will see death)..so far no one has responded with a true degrading cpu

http://www.xtremesystems.org/forums/showthread.php?t=141597

I personally wanted to see if 24hr stable blend Prime/orthos cpu had issues
on 1.55v-1.6v...I doubt will see anything yet..maybe after 2-3yrs...not 1 yr

I personally use 1.5v real as a max..ie that is a vcore measured by DMM

Alot of these cpu related issues could be xs vdmm(which is killing D9 based ram) and mobo issues with too much voltage on the NB

 

[Xvys]

Intel's maximum recommended voltage for the C2D is 1.385v, I believe. The stock voltage of the E6400 is 1.325v. I set my bios to 1.3875v, which equates to 1.32v at the cpu, and 1.315 under load, which is the recommended voltage of the E6300 (470FSB).