CPU Cooling stopped after Forced Shutdown?

[stephen_campos]

Hello everyone,
I recently purchased a new Gaming PC with an i7-6800K and a GTX 1080 from Cyberpower and just received it today. I was going through downloading games and optimizing them to run on my Predator X34 monitor. Everything was running smoothly and at max settings for several hours. I even did a 3DMark test of Fire Strike Extreme and completed the test with a 7k score. Later on I had a an issue changing the resolution in Diablo 3 and encountered a black screen I could not exit from. Alt-tab did not work and there was nothing I could do except force a shutdown by holding the power button on the tower. When the PC rebooted everything appeared to be ok at first, but suddenly it shutdown again on the desktop. On boot up the screen said CPU overheat warning. I entered the bios settings and immediately saw the CPU temperate climbing to 89 degrees! It now does this every time on boot up. I have left the PC turned off for several hours and on boot up the CPU temperature will steadily climb to 89 degrees again until it shuts down. What could be the cause of this? Like I said, I had no issues with overheating until after I did the forced shutdown. I feel like the CPU cooling has stopped working somehow. The cooling rig is an Asetek 550LC 120mm. Any ideas?

Thank you!

 

[rcxtra]

Could be the pump on the water cooler died (it happens). You could try and isolate the problem by switching the FAN and Pump headers on the MB to make sure it's not the MB.

 

[stephen_campos]

Could be the pump on the water cooler died (it happens). You could try and isolate the problem by switching the FAN and Pump headers on the MB to make sure it's not the MB.

Thank you for your reply!

I checked the headers and only the header for the CPU Fan slot was plugged in (this was the wire coming from the circular unit on top of the CPU). Looking around there does not seem to be any other wires coming from the cooling unit. I tried switching the wire to the Pump Fan header slot and got the same results. Any way to tell if the pump is working?

Update: I felt the tubes and one is hot and the other is cool. The radiator is silent and does not feel like it's doing anything.

 

[shag00]

A CPU shooting to 90 degrees at startup = no CPU cooling. 2 causes as you have already changed power source, though please note water coolers need 2 power sources, 1 for the fan and 1 for the pump or the cooler is broken (likely the pump).

 

[stephen_campos]

UPDATE! I fixed my problem!

I was reading on the forums here and found this post by rubix_1011:
"Even though its a sealed cooler, there typically is still some air inside as they are not 100% filled. Depending on how they are mounted, and coupled with the fact that the pumps are notoriously under-powered, they will airlock if air makes it into the inlet tubes and/or the pump itself. The easiest way to fix this is to unmount the radiator, start the pump and lift the radiator above the pump (in height) and rotate it back and forth. This should dislodge air and allow any air to collect in the radiator. While this normally wouldn't be ideal in normal watercooling (you'd want air to collect in the reservoir) you'd rather have the air stay in the radiator than make it to the pump where it would cause the cooler not to perform. Depending on how you have it mounted, you might consider mounting it so the tubes on the radiator are down vs. on top to keep air from entering the return tubing to the pump."

I layed the tower down on it's front so the rear fan was on top and the radiator and tubes were facing downward. When I booted the machine I instantly heard the liquid cooling kick in and the computer went straight to the desktop. I restarted again and checked BIOS. The CPU is now running at a cool 40 degrees.

I hope this fix helps someone else. Thank you all!