Hi all i used turbov evo to auto overclock me yesterday and it brought my i5 2500k to 4.8 ghz however when i played skyrim i noticed the vcore got to 1.56 volts, and i need to know how to adjust it to find stability. Im gonna put a pic of the turbov evo program because i can adjust settings there manually, as the bios are extremely confusing to me. Can anyone tell me what i need to adjust to keep the oc stable, and how to test whether or not it is stable.
Help me undervolt my i5 2500K?
- Thread starter lennon95
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Puppies04
Diamond Member
- Apr 25, 2011
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Which asus mobo do you have?
I can tell you now, you need to either get your head round doing the overclock in the bios or forget it. AI suite (along with just about every other "auto overclocking" program) puts way too much voltage through the chip for a given amount of performance.
Tell me which model board you have and I can pretty much talk you through doing it yourself.
I can tell you now, you need to either get your head round doing the overclock in the bios or forget it. AI suite (along with just about every other "auto overclocking" program) puts way too much voltage through the chip for a given amount of performance.
Tell me which model board you have and I can pretty much talk you through doing it yourself.
asus p8z68-v gen/3
something other than a link to a guide would be helpful. ive found links like that confusing.
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Shooting for 4.8ghz is kinda on the extreme side. But I guess it depends on how much vcore your chip needs to stabalize. It would be best to stay below 1.4v's under load. Most people state that is even too high for 24/7 and feel more comfortable around the 1.35v's max for vcore.
Was gonna type it all out but maybe just look at the following link as it pretty much explains all that is needed. Most likely you'll do some learning along the way which would be better than the just try these settings
This guide was intended for the P67 boards but what your looking for in the uEFI is pretty much the same for the Z68's
http://hardforum.com/showthread.php?t=1578110
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Puppies04
Diamond Member
- Apr 25, 2011
- 5,909
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Ok first things first go into the bios and load optimized defaults. I don't mean to scaremonger but the voltage you are currently running at is quite liable to cause lasting damage or degrade your chip very quickly. Once you have done that then read the guide kenmitch posted for you. If at that point there is anything you are not sure of then come back here and start asking questions we will be happy to help.
yeah i reloaded the optimized defaults this morning after seeing the voltage jump last night before bed.
ok i did the one from the guide kenmitch suggested. the one with the picture walkthrough, and my 24/7 voltage is 1.42 with a 4.8 GHz oc. what do i do know? can the voltage be lower or is this safe for even 24/7 use... btw speedstep is enabled, should i disable it or will it make no difference, i just dont want my chip to get fried ( even though it was much cheaper than tiger or newegg at 179.99, at microcenter. if you have one in your state, its worth the drive) anyway, what do i do now?
EDIT: also what does BCLK do? in the guide, it stayed the same at 100.0 but mine was originally at 103.0 should i change it back to that? (i believe that was with the AI suite doing its own automatic overclock as the card was at 4.3 before with speedstep on)
EDIT: also what does BCLK do? in the guide, it stayed the same at 100.0 but mine was originally at 103.0 should i change it back to that? (i believe that was with the AI suite doing its own automatic overclock as the card was at 4.3 before with speedstep on)
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The BCLK is what use to be the fsb. In the old days one overclocked by upping the fsb as multipliers were locked. These days you can't really do it anymore. Best to leave it at the stock 100.0 setting. You can maybe squeeze a little more mhz by upping it a little bit.
Leaving the energy saving things and speedstep most of the time has no ill effect on overclocking the SB chips. It's best to idle at low speed and voltages.
Did you stress test your chip at 4.8ghz 1.42v's to make sure it's stable? If so you might be able to drop vcore some more. If you used offset voltage then you'd just need to decrease the offset a little bit and test for stability some more. Example would be if your using + 0.090v then drop it to + 0.080v
Some people say staying below 1.45v is safe, some say 1.40v, and others state 1.35v max. It's kinda unkown as to what is 24/7 safe currently. But with voltage on auto depending on the multiplier the chip will ask for up to 1.52v's I believe which is hard coded into the chip by intel.
Leaving the energy saving things and speedstep most of the time has no ill effect on overclocking the SB chips. It's best to idle at low speed and voltages.
Did you stress test your chip at 4.8ghz 1.42v's to make sure it's stable? If so you might be able to drop vcore some more. If you used offset voltage then you'd just need to decrease the offset a little bit and test for stability some more. Example would be if your using + 0.090v then drop it to + 0.080v
Some people say staying below 1.45v is safe, some say 1.40v, and others state 1.35v max. It's kinda unkown as to what is 24/7 safe currently. But with voltage on auto depending on the multiplier the chip will ask for up to 1.52v's I believe which is hard coded into the chip by intel.
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im not sure how to do a stress test. well what program to run, i did download prime 95 but didnt unzip it yet, as i dont know what to do with it.
Your gonna have to download some apps then.
In this thread Idontcare linked some apps to test with.
http://forums.anandtech.com/showthread.php?t=2195063
I like to use Intel Burn Test for intitial testing for vcore. Hit's hard and will make your temps rise quickly. You need to monitor your temps during testing and abort the test if they get too high. For me 80*C is too high while others will go higher. Just start on the default settings and see what happens. You can increase the memory use for further testing. This app works pretty good for finding at least an initial starting point for vcore. This app is also great for a worst case senario of loaded temps. Real life temps will never be this severe.
http://majorgeeks.com/IntelBurnTest_d5987.html
Use something to monitor your temps and voltages while testing. There are alot of them out there.
This one has alot of bells and whistles for temps and voltages. Fire it up and hit the x on the pop up box. Then click on the Sensors tab. You'll find just about anything you'd wanna look at.
I just use the portable zip one so no need to install it. If your on 32bit you'll need to go with that one.
http://www.hwinfo.com/download64.html
If you test at 4.8ghz at your current voltage and it bsods or is unstable your best bet is to down your overclock. You may find that your overclock is dictated by your loaded temps in the end anyways.
the one thing i dont fully understand is what "stable" means. Like what do i look for to check?
Everyone has a different definition of 'stable.' For some, it's stable if you don't get lockups or BSODs during normal use. For others, a 10x pass of Intel Burn Test will suffice. For some, 2 hours of Prime 95, for some 24 hours of Prime 95.
I kind of do a mix. I consider my rig 'stable' right now...it's passed 20 passes of Intel burn Test at Very High stress, run Prime95 for about 6 hours and hasn't locked up during normal use. Of course, these settings on my machine are pretty new, so I'll see how it holds up over the next few weeks, but I'm pretty confident. Of course, for my chip, I'm running a pretty mild overclock. Judging by the voltages I've been able to use (IBT passed at 1.18), I would bet I could pretty easily get to 4.6 or so, but I've never really been about major speed...I tend to keep my chips for 2-3 years, so stable and safe is more important to me than extreme speed....and I typically don't like setting voltage higher than what it uses at stock. Right now, my voltage is right were my chip defaults to at 3.3GHz, so I'm quite happy with that.
Right now, I'm just using default Vcore with an offset of -0.08. This allows low load voltages with really low idle voltages (when running at 1600Mhz, I've seen it drop as low as 0.74V....and I saw it run at 4.1GHz on one core at 0.9V....that made me raise my eyebrow a bit...)
I kind of do a mix. I consider my rig 'stable' right now...it's passed 20 passes of Intel burn Test at Very High stress, run Prime95 for about 6 hours and hasn't locked up during normal use. Of course, these settings on my machine are pretty new, so I'll see how it holds up over the next few weeks, but I'm pretty confident. Of course, for my chip, I'm running a pretty mild overclock. Judging by the voltages I've been able to use (IBT passed at 1.18), I would bet I could pretty easily get to 4.6 or so, but I've never really been about major speed...I tend to keep my chips for 2-3 years, so stable and safe is more important to me than extreme speed....and I typically don't like setting voltage higher than what it uses at stock. Right now, my voltage is right were my chip defaults to at 3.3GHz, so I'm quite happy with that.
Right now, I'm just using default Vcore with an offset of -0.08. This allows low load voltages with really low idle voltages (when running at 1600Mhz, I've seen it drop as low as 0.74V....and I saw it run at 4.1GHz on one core at 0.9V....that made me raise my eyebrow a bit...)
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