Overclock.net banner
Cancel
Create thread New Forums

Intel i5 2500k underclocking itself underload

Jump to Latest
2.8K views 17 replies 7 participants last post by  VL92  
V
#1 ·
Hello, I recently moved into a new house and my CPU seems to be having a very weird issue. I underclocks its self under load, sometimes when idle and not in the usual speedstep way. I mean it will go from it's stock clock 3.3ghz to 2.4ghz stay at there a bit then go doesn to as low 800mhz. If i try to run games, EVGA Precision shows my GPU isn't be used much, my guess is because of this issue it's bottle necking my card.
It's a really annoying problem as I'm stuck waiting two weeks for proper broadband and a computer that use to run Far Cry 3, Deus EX HR ex at 60FPS perfectly. But now lags at 5-20FPS. I've tried resetting my mother board bios to stock but same issue, could anyone help me out?
My temps are also reading weird, at 90c+ for my CPU in CPUID Monitor but 60C in CPUID so I'm guessing due to a new environment it's throwing the readings off, but it may or may not be related.
Thanks system specs below.

GPU - EVGA GTX 580 1.5GB
RAM - Corsair 2x4GB DDR3 1066mhz
MB - ASRock Fatality z77 Performance
OS - Windows 7 Ultimate 64bit
 
U
#2 ·
Your heatsink likely became loose when you moved your computer so now your CPU is over heating and thermal throttling.

Check out RealTemp. If the Thermal Status area shows LOG, that means that core has been thermal throttling at least once since you last booted up. If it shows HOT, that means thermal throttling is in progress. RealTemp will also accurately track your multiplier if you are throttling.

RealTemp T|I Edition
http://www.overclock.net/t/1330144/realtemp-t-i-edition
 
V
#3 ·
Cheers, seems to be it. Reapplied heatsink twice, then reapplied (after removing) the thermal paste. It's cooler but I run intel burn test and it still underclocks, RT say it is thermal throlling. Not sure what to do now, hmmm :/
Runs games at a much higher FPS but skips a often, bit worrying as I don't wish to damage my CPU.
 
#4 ·
Quote:
Originally Posted by VL92 View Post

Cheers, seems to be it. Reapplied heatsink twice, then reapplied (after removing) the thermal paste. It's cooler but I run intel burn test and it still underclocks, RT say it is thermal throlling. Not sure what to do now, hmmm :/
Runs games at a much higher FPS but skips a often, bit worrying as I don't wish to damage my CPU.
Click to expand...
What thermal paste? What cooler are you using? Are you overclocking? What voltage are you running? Are you somehow blocking airflow to the case? Have you checked to make sure you CPU fans are plugged into the fan headers? Have you checked the fan settings in BIOS?

I know its allot of questions, but there are lots of variables in your described scenario. You wont "kill" your CPU with temps like your describing, IIntel put the thermal throttle in for this exact reason, but it could degrade over time if it is not addressed.
 
V
#5 ·
No problems, using a Corsair H80 cooler. Good room in my case, cooler master no cables in the way or anything of that sort. Thermal paste is by akasa voltage is default stock, runs at 0.9 to 1.2 on 3.3ghz. Fans plugged into the motherboard so I can control the speed using SpeedFan (Corsairs fan control is useless). So they run on max.
 
#6 ·
Quote:
Originally Posted by VL92 View Post

No problems, using a Corsair H80 cooler. Good room in my case, cooler master no cables in the way or anything of that sort. Thermal paste is by akasa voltage is default stock, runs at 0.9 to 1.2 on 3.3ghz. Fans plugged into the motherboard so I can control the speed using SpeedFan (Corsairs fan control is useless). So they run on max.
Click to expand...
That H80 with decent TIM should keep you WAAAAAY below thermal throttle. Either it was not seated properly or has lost some liquid. You can check to see how good the contact is by simply lifting the heatsink and examining the paste, it will leave a fingerprint of sorts and you should be able to tell if good, even contact is being made. I have not owned a corsair type water loop so I am afraid I would be unable to help determine if the thing is having any issues related to water levels.
 
#7 ·
Is your CPU overclocked?

Be sure to set your CPU power limits in the BIOS to prevent the power throttling when under load.

Short Duration Power Limit - 250
Long Duration Power Limit - 250

Report back and let us know how you get along.
thumb.gif


EDIT:

 
#10 ·
They are the little square chips that usually surround the CPU socket (sometimes covered by heatsiinks, depending on the motherboard). If you have a water cooling etup they might not be getting any airflow over them (as they would with a normal air cooler) and they can overheat. Point a fan at the CPU socket and see if it helps.
 
Save
Reply Quote Rep+ Rep+
V
#13 ·
That's what I mean, haven't got any just the one that on the side panel of my case. Which is turned on and points just below the CPU and runs at a constant speed. It's built in, can't remove it and reposition it sadly :/ Maybe I should buy some cheap case fans and install them? Also maybe unrelated but two screws for my Corsair H80 aren't in because I lost them a while ago, fan is still attached to the radiator and never effected the temp before, maybe that's it?
EDIT: Seems to be ok now after leaving it off for the night, might happen again but I'll try to get some more fans for my case to prevent it, thanks guys for the help
smile.gif
 
V
#15 ·
Tried underclocking as well, still says 90c+ SpeedFan tells me its at 56c is there anyway to recalibrate my motherboards thermal censors? I heard spraying cold air on them works, I always felt them while my pc was running at this temp and everything was cool and nothing very hot.
 
#17 ·
*Clear the CMOS, go here and Add your rig - Rigbuilder > Edit signature text > Choose your sig rig as featured sig item. Also if you can provide some pictures of your setup that would be great.
thumb.gif


(Sure way of clearing the CMOS)
Switch off the PSU
Hold the power button to drain any excess power still left in the rig.
Take the CMOS battery out
wait a few mintues (5minutes is enough)
Pop battery back in.
 
Overclock.net
posts
28M
members
562K
Since
2004
The premier forum for overclocking experts and enthusiasts. Discuss hardware optimization, custom builds, benchmarking, cooling solutions, and pushing the boundaries of computing performance. From beginner guides to extreme overclocking, join our technical community to master system tuning.
Full Forum Listing
Explore Our Forums
Intel CPUs Hardware News NVIDIA PC Gaming Water Cooling