Overclock Settings for i5 3570k ivy bridge on a asus P8Z77-V LX

Riplol

Riplol

Riplol

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2 May 2011
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Hello, long-ish time OCUK lurker here who has finally got around to custom building his first desktop.

I was looking around the forums and couldn't find anyone with exactly the same CPU + mobo combination. The only thing I've done so far is set the clock to 44x multiplier but apart from that I was wondering what other settings people were using on the same set up.

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Someone I know suggested the voltage is too high which is most likely right but I was wondering what other settings were being used out there.
 
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my god yes those volts are a bit high for that clock ;)

change the cpu voltage to fixed, bring is back to about 1.2somthing, can maybe change the "load line calibration" in the DIGI+ settings to high/ultra high if you notice the voltage dropping below your value in windows or when stressing (i use ultra high, it overshoots the voltage slightly but anything lower and i would get a drop)
 
Oh dear. you're going to want to take it off of the 44x multi immediately before putting it under load as 1.44v is extremely high for anything under a good custom water loop and 54c at idle is going to translate into temps higher than I definately wouldn't be comfortable running, even for a short time.

Go back to stock settings before you do any damage and I'll try to guide you through it, although there's a dedicated thread to overclocking IvyBridge cpus...

Now what cooling are you currently using?
 
Right I'll change it in the BIOS immediately. Currently using the Corsair Hydro H80 liquid cooler. I looked in the ivybridge thread and couldn't see a CPU + mobo + cooling system which was near mine but I may have missed it to be honest and apologies if I did.
 
Riplol said:
Right I'll change it in the BIOS immediately. Currently using the Corsair Hydro H80 liquid cooler. I looked in the ivybridge thread and couldn't see a CPU + mobo + cooling system which was near mine but I may have missed it to be honest and apologies if I did.
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I've got vary similar ;) well... the i7, same cooler :D and same range of motherboards, just mine has more bells and whistles on it xP same basic principals :) hope you have tapped the button on the H80 to set it to performance mode :)
 
The H80's pretty good but it's best practice to take overclocking slow. With that vid logic I wouldn't of been surprised if the motherboard decided to pump over 1.5v with a multi of 46x or more. Thats one of the ways you can instantly fry a CPU.

As Sasso said, change CPU Voltage to fixed voltage and set it to 1.2v. I'd bring the multi back to 4.3 for now as well and make sure that is stable under prime95 (which you should download now if you don't have it yet). run it on Small FFT's for 10 minutes and keep an eye on temperatures. Don't let them get above 80c.

Also put LLC on turbo I think it is on that motherboard, the 2nd highest setting and keep upping the multiplier to 44x/45x etc until it becomes unstable. once it does and as long as none of the cores are going above 80c after 10 minutes of running prime you can up the voltage a little bit at a time (0.01v) until it becomes stable before upping the multiplier once again. Rinse and repeat until you hit unacceptable temperatures.

once temps hit 80c under full load then thats pretty close to your limit and I'd start thinking about doing some longer term stability testing, so several hours in p95 and play a few hours of an intensive game such as BF3. If you get any issues like BSOD's then up the voltage a little bit more until it's 100% stable and thats pretty much it for a decent overclock.
 
Changed the BIOS settings to the minimums you suggested as well as turning the LLC to ultra (second highest setting). First 10 minuet small FFT test ran no 59 degrees on the cores. Got to go out for 2 hours now but will continue the 10 minuet tests at 44x, 45x etc later today. Thanks for the help, very much appreciated.
 
Krono5 said:
There's no need for it to be overshooting so if it's higher than what you set in Bios you could lower it a level.
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ahhh new prime :) thanks!

but i have my to overshoot the voltage but just have it set a bit lower in bios to compensate for it. if i just have mine on high compared to ultra i get 0.015v droop, but on ultra it just flickers by 0.006-0.008v so my preference is the option with the reduced droop :) i mean.... could whack it on extreme and not get any movement atall... but it overshoots that much more :p so i think i have a happy medium :D
 
In both 43x and 44x the voltage was only going to max of 1.21V even after half an hour of testing in prime. Looks pretty stable, going to test 45x and 46x later after I've played BF3 on it for a bit.
 
AllBodies said:
Ivy bridge seems to require 1.2v or less for anything up to around 4.5 or 4.6 GHz, so yeah try not to go so high.

Also Ivy scales in temperature VERY BADLY with voltage, so you want the voltage as low as possible anyway. This article may help:

http://www.anandtech.com/show/5763/undervolting-and-overclocking-on-ivy-bridge
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That's interesting because I can't seem to find stability @ 4.5 so far that I've tested to anyway (1.2-1.23v). It is happy at 4.4 at 1.2v (I haven't tried lower yet although I imagine there would be stability at lower voltages). My temperatures up to 1.23v haven't gone over 66 degrees yet. Going to run some more tests tomorrow.
 
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