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overclocking turbo boost on an i5 2500K / P8P67 LE board. Having some issues - Page 2

post #11 of 19
Thread Starter 
welp tried changing it to a ridiculous value like 500 and problem persists frown.gif

also along with those sudden drops I got a freeze this time
post #12 of 19
Thread Starter 
when running at 4.4ghz:



when running at 4.1ghz:




weird part is that I just cant pin down a treshold for where it suddenly starts dropping.

there doesnt seem to be a number of temperature, power, or anything that as soon as it hits it, it drops. At least not that I can see

There's not even that much of a difference in temps/voltage/etc when running 4.4ghz yet anything above 4.1ghz seems to trigger the "turbo boost straight up stops" issue :/
post #13 of 19
Thread Starter 
well **** nevermind, happened with 4.1, just that it took quite a bit longer:



clueless.

temps keeping above 70°C? wattage reaching 80.0W? the hell is causing thisssssssssssssss
post #14 of 19
Thread Starter 
aaaaand now it got stuck winding down and back up, as always



looks like the only thing that changes is that the higher the clock the faster it happens
post #15 of 19
Thread Starter 
pics of how I have everything set up on BIOS:














sorry for the multi-posting, this is just rally bugging me and I figured i'd put as much information as im gathering out there
post #16 of 19
It could be the voltage regulator on your motherboard is overheating. When it overheats, power to your CPU is reduced so the CPU throttles back the turbo boost. Cheaper motherboards are cheap for a reason. They use smaller heatsinks on some of the critical components. Open your case and point a fan directly at the VRM and you might fix the problem. Grab on to a heatsink when stress testing and you might be in for a surprise.

You can also try using ThrottleStop to disable the BD PROCHOT feature if that is enabled on your motherboard.

ThrottleStop 5.00
http://www.techinferno.com/downloads/
Edited by unclewebb - 11/6/12 at 8:51pm
post #17 of 19
Thread Starter 
Quote:
Originally Posted by unclewebb View Post

It could be the voltage regulator on your motherboard is overheating. When it overheats, power to your CPU is reduced so the CPU throttles back the turbo boost. Cheaper motherboards are cheap for a reason. They use smaller heatsinks on some of the critical components. Open your case and point a fan directly at the VRM and you might fix the problem. Grab on to a heatsink when stress testing and you might be in for a surprise.
You can also try using ThrottleStop to disable the BD PROCHOT feature if that is enabled on your motherboard.
ThrottleStop 5.00
http://www.techinferno.com/downloads/

interesting.. gonna try with ThrottleStop, read about it

mobo temps seem to be okay during tests though, but I guess those readings arent as reliable?
post #18 of 19
Thread Starter 
quick update: turns out I was VERY behind on BIOS version.

blend test after updating it:



temps and voltage in general are much more stable after the update, but as you see, the issue remains. Just suddenly starts doing that out of the blue frown.gif

just in case: prime95 isnt supposed to do this during a blend test... right? lol. It honestly seems oddly specific, it always does it, always all of the sudden and always after a similar amount of time
post #19 of 19
No, it's not supposed to do that. It looks like it is throttling for some reason, but you have hit all the obvious things already. Couple of changes you can make in the BIOS (probably wpn't change anything though). You can disable Intenal PLL Overvoltage, which is normally only needed above 4.5. Also, you can use the "By All Cores" setting instead of the "By Per Core" one. You can also try turning all the power saving stuff back on (EIST, C1E, C3, C6) to see if that changes anything - having them on shouldn't affect the overclockability.

With it happening at different times based on the speed, I think it may be what unclewebb said, and something is overheating/hitting a limit on the motherboard.

Have you tried any test other than Prime95 blend? Prime95 small FTTs, or IBT?
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