***Official Ivybridge Overclock Thread***

[Arron17]

I think I've managed to get mine stable at 4.4ghz using offset now. No LLC and gets to 1.22v under full load, max temps 75C.

 

[Nuclear Fusion]

I'm running at 4.2GHz on offset voltage, 1.16V at max load, max voltage is 1.18V, 50% LLC, 0.93V under no load. Not sure if I can get the voltages down any more, I tried these settings at 4.3GHz but I blue screened after 45 minutes of Prime95 blend. I have run this stable for 4 hours of blend and 4 hours of small ffts, I might try and tweak some more, but at the moment it seems to be good. I peak at around the 70C mark for Prime, and about 50C during gaming. Do these settings and temps sound reasonable? Should I try a larger negative offset? (currently at -0.05 on a P8Z77-V)

 

[Arron17]

I'm running at 4.2GHz on offset voltage, 1.16V at max load, max voltage is 1.18V, 50% LLC, 0.93V under no load. Not sure if I can get the voltages down any more, I tried these settings at 4.3GHz but I blue screened after 45 minutes of Prime95 blend. I have run this stable for 4 hours of blend and 4 hours of small ffts, I might try and tweak some more, but at the moment it seems to be good. I peak at around the 70C mark for Prime, and about 50C during gaming. Do these settings and temps sound reasonable? Should I try a larger negative offset? (currently at -0.05 on a P8Z77-V)

They seem about the same as I got for a stable 4.2ghz. I have found that when you get into higher clocks it is sometimes better to have a lower LLC and a higher offset. So maybe try that for 4.3Ghz.

 

[Nuclear Fusion]

They seem about the same as I got for a stable 4.2ghz. I have found that when you get into higher clocks it is sometimes better to have a lower LLC and a higher offset. So maybe try that for 4.3Ghz.

Ahh ok, thanks, I'll probably just leave it at 4.2GHz at the moment, it is certainly fast enough as it is

 

[sunshinewelly]

I used my ASROCK MB to simply set it at 4.2 GHZ and have left it like that. no other changes and it runs very happilly

 

[covenantuk]

I used my ASROCK MB to simply set it at 4.2 GHZ and have left it like that. no other changes and it runs very happilly

Yeh, from what I have seen, if you just want an easy 24/7 overclock then leave everything at default and set boost multi to 42. Not seen an IB fail at that yet.

 

[Arron17]

I used my ASROCK MB to simply set it at 4.2 GHZ and have left it like that. no other changes and it runs very happilly

If you've left the voltages at default which is probably auto, you might want to double check what voltages your getting, there probably far too high for the clock speed.

 

[mattf]

arrrgggghhhh updated my bios... lost my oc. Just using at 4.2 at the moment

 

[zpaf]

Minimum voltage for my Ivy.

All other bios settings at defaults.

 

[Pilgrim57]

Can't exceed default with 3750K

I'm utterly confused
Have overclocked before but this IB with the UEFI bios has me stumped.
ASUS P8Z77-V Pro with Corsair 1600MHz ram.

Whatever I set the CPU ratio to within a minute of windows loading value indicated by CPU-Z or Real Temp drops back to default 3400MHz
Have tried auto overclock & that sets x41 but does the same when system isn't loaded or BOINC starts with windows
Real Temp shows 55C max.

Have turned speed step & thermal monitoring on & off to no effect.
Have set cpu fans to max 1400rpm on Be Quiet Dark Rock Pro 2 without effect.
Surely this can't be thermal throttling?

Have turned off CPU C1E etc

Have I missed something or made a mistake?
I thought I had to change 2 BIOS setting & I was at least at 4GHz

Could it be a faulty chip?

Any advice or pointers to where I can find a step=by=step guide would be most helpful. Thanks.

 

[hyperst]

I'm utterly confused
Have overclocked before but this IB with the UEFI bios has me stumped.
ASUS P8Z77-V Pro with Corsair 1600MHz ram.

Whatever I set the CPU ratio to within a minute of windows loading value indicated by CPU-Z or Real Temp drops back to default 3400MHz
Have tried auto overclock & that sets x41 but does the same when system isn't loaded or BOINC starts with windows
Real Temp shows 55C max.

Have turned speed step & thermal monitoring on & off to no effect.
Have set cpu fans to max 1400rpm on Be Quiet Dark Rock Pro 2 without effect.
Surely this can't be thermal throttling?

Have turned off CPU C1E etc

Have I missed something or made a mistake?
I thought I had to change 2 BIOS setting & I was at least at 4GHz

Could it be a faulty chip?

Any advice or pointers to where I can find a step=by=step guide would be most helpful. Thanks.

I'd suggest clearing cmos and giving it another go, maybe you changed a setting it does not like, also load optimized defaults by pressing f5, then save and quit, go back into bios and set your memory speed to xmp or 1600mhz if that's what you are using, then change the cpu vcore and multiplier to what you want and see what happens

 

[Pilgrim57]

I'd suggest clearing cmos and giving it another go, maybe you changed a setting it does not like, also load optimized defaults by pressing f5, then save and quit, go back into bios and set your memory speed to xmp or 1600mhz if that's what you are using, then change the cpu vcore and multiplier to what you want and see what happens

Should have mentioned I updated to latest BIOS.
Cleared CMOS, used x41. Windows loaded CPU-Z showed 4.2GHz, started Prime & within a minute back to 3.4GHz.
XMP bumps the bclk to 103 but doesn't change multiplier.
Tried x36 thinking it might be volts as I can't seem to set a number in the BIOS only offset volts. Still loaded default speed
Thanks for your help. Might give OcUK a ring tomorrow

 

[Buckster]

I've almost given up on pushing harder my 3770k - 4.4 just seems to suit it nicely, at 1.225V it doesn't get too hot (always <82C). if I push to 4.5-4.6 I get much worse temps for very little performance extra

4.4 , especially with RAM @ 2200 though feels a very snappy - wanting for nothing system though

 

[mnet674]

http://valid.canardpc.com/show_oc.php?id=2377516
My 3770K sits happily at this speed, plenty fast enough for me coming from a QX9650 that wouldn't even stay stable at 3.6Ghz!

Temps are about 68-70C on highest core under IBT. Cooler is an H100 with stock fans on middle setting.

 

[Pulse]

Cannot wait to get my hands on my chip and start overclocking!
Should be with me Saturday, but the rest of my parts should be arriving tomorrow. Going to spend all of Saturday night, probably straight through to Sunday night, reinstalling, gaming and benching

 

[G.O.A.T]

I've been playing around with my new 3770k build. I have a custom watercooling loop with a 2x 120mm rad for cooling.

The results above are with hyper-threading disabled and seem to be stable for day-to-day use. I've set the volts to 1.225 in the bios and 4.7Ghz gives temps in the high 60's - low 70's. When gaming it's much cooler though and most of the fans switch off when at the desktop.

I've seen the WHEA-Logger 19 errors show up in the system error log when the volts are any lower. Just for fun I tried 4.9Ghz and it seems stable enough at 1.35 volts but the temps were hitting mid 80's so not sure I'd want to run that 24/7. I might revisit the hyperthreading situation if I start running a number of VMs on here rather than just use it as a gaming rig.

 

[Nuclear Fusion]

If you've left the voltages at default which is probably auto, you might want to double check what voltages your getting, there probably far too high for the clock speed.

This is what I always tell people when they say they are running at 4.4 GHz on 'stock' volts. I tell them to go check CPU-Z, and then it says their Vcore is something like 1.35v. I wouldn't exactly call that stock volts! So I would always be careful when using offset voltage, because it can make you think that you are running at stock volts, when actually the mobo is sending far more than is necessary. I can see a lot of people who think 'wow, I can do 4.7 GHz on stock volts, this must be an amazing chip' when they don't realise the mobo is automatically sending far far more. This is where tweaking using a negative offset comes in. Bottom line is that at default, the motherboard decides what Vcore depending on current clock speed, so always check your vcore in CPU-Z to make sure it isn't ridiculously high- rather than upping the multi and thinking you are using stock volts.

 

[Arron17]

This is what I always tell people when they say they are running at 4.4 GHz on 'stock' volts. I tell them to go check CPU-Z, and then it says their Vcore is something like 1.35v. I wouldn't exactly call that stock volts! So I would always be careful when using offset voltage, because it can make you think that you are running at stock volts, when actually the mobo is sending far more than is necessary. I can see a lot of people who think 'wow, I can do 4.7 GHz on stock volts, this must be an amazing chip' when they don't realise the mobo is automatically sending far far more. This is where tweaking using a negative offset comes in. Bottom line is that at default, the motherboard decides what Vcore depending on current clock speed, so always check your vcore in CPU-Z to make sure it isn't ridiculously high- rather than upping the multi and thinking you are using stock volts.

Yeh, I've been very careful when clocking mine. I'm running a positive offset to get 4.4ghz stable but I check it under load in cpu-z and the most it ever gets to is 1.224v. And i don't think that's much over the stock voltage at full load.

 

[zbaracki]

somehow my 3770K requires massive overvoltage to keep stable.

at 4.7GHz, voltage flows between 1.38 and 1.40, trying to get any lower (by asus turboV software) results in immediate BSOD. temps not exceeding 80 C.
this is under full load, prime95 8 threads (ht on)

managed to get down to 1.08V at 4.2GHz with temps not exceeding 50 C.

also - difference between coldest (core 1) and hottest (core 2) are always around 10 C, with core 0 and core 3 somewhere between them.

is it normal behaviour? any advices? tia!

edit: screenshot here

 

[Arron17]

somehow my 3770K requires massive overvoltage to keep stable.

at 4.7GHz, voltage flows between 1.38 and 1.40, trying to get any lower (by asus turboV software) results in immediate BSOD. temps not exceeding 80 C.
this is under full load, prime95 8 threads (ht on)

managed to get down to 1.08V at 4.2GHz with temps not exceeding 50 C.

also - difference between coldest (core 1) and hottest (core 2) are always around 10 C, with core 0 and core 3 somewhere between them.

is it normal behaviour? any advices? tia!

edit: screenshot here

Once you get over 4.4 - 4.5ghz the amount of voltage needed seems to rise massively to get it stable. I tried mine at 4.5 but it needs almost 1.3v and the temps get too high.