Cpu is overheating, fans are spinning though.

[ttg_Avenged]

Hello, i have a p8z68 mobo and an i5 2550k with an older H100 water cooler.

I dont know much about how the radiator works to cool the cpu, but two fans are running. I felt the tubes, water is 100% moving.

The motherboard gives me a CPU Fan error and i press f1 to get into bios. The bios detects my chassis fan not my cpu rad. Should i try the cpu_optional header?

The cpu fan header is plugged in for my h100. What can i do now? Cpu reaches 100 degrees in 2 mins.

Edit: wait a minute.. the cooler seems to be functioning, liquid flowing and fans spinning. Why would it overheat then.. all the 3 pin fan header does is tell the mobo the rpm and voltage, right? I dont care about the 3pin then, do i?

 

[Alan Caldwell]

Reapply thermal paste and reseat the cooler.

 

[ttg_Avenged]

Is there anything else i can try first? Rebuilding ny computer would take me 3 hours or so. I tried using the optional cpu port and the radiator was working and spinning but cpu temp still over 100

 

[ttg_Avenged]

The cooler fan header feels very wobbly or loose. This is prolly my issue, should i try the stock cooler? Also is there any way to fix a fan header cable?

 

[ttg_Avenged]

I built this computer 3 months before the GTX680 launched.(MID 2012?)

If that helps at all.

 

[MeanMachine41]

Thermal limit is 72.6C for i5 2550k. If you are convinced that the radiator is pumping OK then something is reading the temps incorrectly. At 100C your CPU would degrade and should have throttled down or in fact shut down well before. I am of course assuming your talking Celsius and not Fahrenheit.
Check that the CPU hold down bracket has not loosened. If indeed the cpu_fan cable has broken, it can be re-soldered.

 

[ttg_Avenged]

Ok, so its def celcius. The cpu is shutting itself down if i stay in windows even after it severely throttles. I was playing Overwatch over 100fps (normal) all day no issues ystrday.

The cooler wont really budge. Should i really try remounting it, it has been three years but why would my tpaste just die in over night, u know?

 

[Inkiad]

It will take under half hour to reapply thermal paste. Try it first.

 

[ttg_Avenged]

Ok! And im sorry im being stubborn but i just dont see the logic in how tpaste could be the problem if my computer was working fine yesterday. It started slowing down or not responding last night, aka throttling then i restart to see the temps in bios. Can tpaste really have this immediate effect?

Sorry again, im curious. I will reapply paste in an hour or two i think.

 

[Inkiad]

Your block can also become loose, that is also a possibility. The thing is exhaust the possibilities, your problem will be solved.

 

[MeanMachine41]

If its EUFI Bios check at idle your temps and fan control to the pump,however there is the possibility the pump is not working cause of a broken cable or a slim possibility of blockage in the radiator or tubes. As the CPU is throttling then it is overheating and will degrade the CPU, Do not continue running the system till you find the problem. Like it or not you will have to reapply your TIM, Just to be sure.

 

[ttg_Avenged]

Ill be reapplying it in about 30 minutes, thanks for the help this far.

 

[ttg_Avenged]

So im just about to reapply my tpaste/tim and here is what the left overs look like.

http://imgur.com/XYctLqa
http://imgur.com/pCTbd7w


This is promising, yea?

 

[ttg_Avenged]

Reapplied tim, still getting CPU fan error. Went to bios, cpu goes from 29c to 80ish in about 3 minutes. Just bios..

I have my case open, i put my finger close to my cpu and i feel no warm air? Normal for having a liquid cooler?

What now?

 

[Inkiad]

Do you have any other cooler? Is so, check with that.
As someone said before, your tubes can also become jammed, as you said you hear the pump running and coolant running.

 

[InvalidError]

If your CPU temperature hits 80C in the BIOS with the heat exchange block allegedly properly pasted and installed, then you have an issue with coolant flow between the CPU block and radiator - the CPU should not be getting anywhere near that hot when there is only one active core.

Liquid cooling is often more trouble than it is worth.

 

[ttg_Avenged]

I felt movement in the tubes. Must mean it isnt jammed? I guess ill try the stock cooler. Yay? Id rather fix the issue with my better cooler if i can

 

[Inkiad]

Try with stock cooler, your water cooler MAY have issues.

 

[ttg_Avenged]

Alright ill be done with that in another hour or so. How possible is the sensor being wrong? The air next to it isnt warm. Like at all. Ambient almost.

 

[InvalidError]

I felt movement in the tubes. Must mean it isnt jammed?

Or you are just feeling vibrations from elsewhere in your system through the hoses and nothing is actually moving inside of them. The fact that your radiator appears to be at ambient temperature while your CPU is almost at its thermal tripping point clearly indicates that little to no heat gets carried from the CPU to the radiator for some reason. If the block was attached correctly and the pump was pumping coolant, the radiator temperature should be around 20C cooler than the core temperature. At 80C core temperature, the return hose to the radiator should be unbearably hot, not "almost room temperature."

 

[ttg_Avenged]

Exactly why im so confused man. While i cant guarantee its flowing, it definitely feels like flow and not vibrations. Could the cpu temp sensor be the issue? I know i applied the tim correctly, and the cooler was plenty tight. I think i would havw damaged the board of i went further.

 

[DonQuixoteMC]

Troubleshooting is necessarily obtuse. You have to eliminate variables to figure out an unknown problem. Removing the question of the efficiency of your cooler is sort of an unavoidable step. I get it, it's going to be a pain. 😛

 

[ttg_Avenged]

Yea, i gotcha. I reseated the same cooler TWICE and one time it took 2 minutes to get to 90c, the second time it took 20 mins. Not sure what that means really.

Im going to try the stock cooler.

 

[InvalidError]

You could have tried touching the base of your CPU block: if the CPU is getting to 80C, the block should be getting extremely hot. If it barely feels warm, then there must be poor heat transfer between the CPU and block.

Each core inside the CPU has its own thermal monitoring circuit. If Speedfan, HWInfo and other monitoring software reports all cores hitting 80C under light load, you can rule out defective temperature monitoring: it is extremely unlikely that all four cores' temperature monitoring would be defective in the same way and similar magnitudes.

 

[ttg_Avenged]

Ok problem solved. Stock cooler is not moving 31c after 20mins. So what could be wrong with my water cooler? Should i make a new thread?