~~~~~IMPORTANT SANDYBRIDGE OC INFO: Voltages & OC Guide!!~~~~~

[jimhaumman]

nice guide

 

[TK421W]

Evening all.

Hopefully one of you might see this and have a bright idea:

Got a I5 2500, gigabyte Z77 UD3H motherboard, and have started overclocking it. reading all the threads on this was informative but also a tad confusing, so i decided to keep it simple and just clock with the multiplier and not mess with voltages and see what happens. after each increase in multiplier, i did a 2 hour large FFTs test, all of which were fine. Then, got to x43 multiplier, was fine for 2 hours, temps fine (max at 60), but found mouse and wireless adaptor were working in there usb3 ports.

Plugged them into other usb 3 ports, work fine. then got blue screen, then rebooted by itself and now original usb 3 ports are fine again.

any ideas?

 

[Justintime]

Only idea is that the overclock is unstable. You really need to start manually changing stuff as you approach 4.4-4.5GHz Assuming everything was left to auto?

 

[TK421W]

I agree justintime, just thought i would try just the multiplier first. (everything is still on auto)

Thing is, little princess woke me up at 17.00 so i did another prime95 large fft test and left it until now, no errors on any and all usb ports and devices working.

weird.

Think i may try upping to x44 and see what happens (!)

 

[{SAS}TB]

Are these max voltages and no no on the base clock applicable to the Socket 2011 / x79 SB-E (3930 under water)?

Cheers

 

[DGarfield]

I have an i5 2500K @ 4.4Ghz - 1.3v core

 

[Akagi]

Someone on another forum has got to 4.8ghz stable at 1.33vcore !!!

http://img207.imageshack.us/img207/4213/91166230.png

CPU-Z is probably reading that incorrectly. Mine reads 1.34v, I am actually pumping 1.36 - 1.37 through it.

 

[Uncle Petey]

Lazy clocker here
1.360-1.376v @4.5ghz with auto settings on a simple multiplier change to 45.
Struggling to find the motivation to do it properly lol...

 

[Akagi]

Lazy clocker here
1.360-1.376v @4.5ghz with auto settings on a simple multiplier change to 45.
Struggling to find the motivation to do it properly lol...

Exactly the same volts as you but on 4.6GHz (manual OC) was on 4.7GHz stable for a year, but then I started having stability issues. DDDDDD:

 

[Uncle Petey]

Reckon it's worth trying to do it properly? I get the feeling that this chip could do 4.5 with less voltage on a manual OC (or higher clocks with similar voltage), but it seems like more hassle than it's worth considering that temps are absolutely fine and I don't need the extra speed.

 

[jotto]

Reckon it's worth trying to do it properly? I get the feeling that this chip could do 4.5 with less voltage on a manual OC (or higher clocks with similar voltage), but it seems like more hassle than it's worth considering that temps are absolutely fine and I don't need the extra speed.

Less volts is always going to be better in the long run. I started using Auto for my 4.5GHz OC but was worried when my Vcore was getting high.

Happy with my 1.312-1.320 Vcore and lower temps than when set at Auto. All helps prolong the life of the system......Hopefully! lol.

 

[Uncle Petey]

What were your auto voltages?

 

[jotto]

At 4.5 and all settings on Auto IIRC I was pushing about 1.4. TBH I cant really remember as I deleted all my notepad documents once I got stable.
I do know at 4.4GHz on auto , Vcore was 1.344v and temps were 64 degrees max ( fans on full ) but when manually setting, I got to 4.4GHz with 1.296 Vcore and max temps of 62 degrees. Guessing my cooler is capable of keeping it around the 62-64 mark.

 

[Uncle Petey]

Ok, I may have a play. If it it could get into the 1.2v zone @4.5, that'd be nice I guess.

 

[chorcen]

Guys, question from beginner overclocker:

If I take MSI Big Bang Xpower II motherboard (http://uk.msi.com/product/mb/Big-Bang-XPower-II.html#/?div=Detail) and Intel Core i7-3970X (http://www.overclockers.co.uk/showproduct.php?prodid=CP-440-IN&groupid=701&catid=6&subcat=1672) with a thought to overclock it, what can I do, because I read tons of articles where it explaines how to overclock using Base clock and FSB, but here in first post I see warnings not to use these 2 values. The question is, how do I overclock then, I don't think playing with voltages give me any results, or I am wrong?

 

[Justintime]

Different breed of chipset/cpu, read a bit on Sandy Bridge E

http://www.bit-tech.net/hardware/cpus/2011/09/20/how-to-overclock-sandy-bridge-e/1

 

[Adsta]

Got my 2500k at 1.270v @ 4.4ghz now quite happy with that. Primed it with a blended test temps got to 50c max after a 4 hour run.

Might up it some more later down the line.

 

[Jumper118]

i have a [email protected] on 1.315v 24/7 and can get 5ghz with 1.4v

 

[Szpakos]

nice lads
im runing [email protected] 1.34v 24/7, anything over 45x reset my pc but only on my new bios flashed yesterday
im thinking to go back to old one
on new bios vcore is very weird, can't set up properly what i want ;/

stres temp 75C :/ watercooling soon

 

[WalderX]

I had another go at OCing my 2500k tonight. I reset the bios settings and went for 50x multiplier, PLL overvolt enabled, LLC @ regular (0%), phase and duty control at extreme and everything else on auto. I seem to be stable so far, only played 30 mins of BF4 but had no problems. Thing is with core voltage at auto it was hitting 1.544v max, temp topped out at 65. I know that voltage is rather high for the 2500k but if my temps dont go above 65 do we think this will be ok for the next 6-12 months until I upgrade? Or do I run risk of killing the cpu at this voltage?

I should add, BF4 was definitely smoother at 5.0GHz over 4.5GHz. Absolutely 100% noticeably smoother!