Overheating in the i5-4690K occurs when it gets too warm during operation.
Overheating in the i5-4690K occurs when it gets too warm during operation.
The PC was stored for some time before being brought back. I disassembled it to check for damage and confirm proper installation, everything appears intact. I changed the thermal paste on the AIO, put it back together, and now the CPU is overheating quickly, reaching temperatures near 85-90°C during startup, triggering an overheat warning on POST. I reinserted the AIO and reapplied the thermal paste, then reset the BIOS to its default configuration (except adjusting the CPU fan settings to disregard RPM because the pump is active). Despite these steps, the issue persists. My system specs are: i5-4690k Corsair H100i GTX AIO cooler, 16GB Corsair Vengeance DDR3, MSI GTX 1070 GAMING, and Corsair CS750M PSU.
We're discussing how long the AIO has been idle—likely several years. The device appears to be quite old, possibly decades in use. Since the liquid inside can degrade after years, it's possible your unit is past its optimal condition. Would you like me to attempt installing a basic air cooler for testing?
I’d still attempt a different, even if subpar, cooler just to be safe. You might also consider reducing vCore slightly. From what I’ve seen online, 1.25v works, but moving toward higher frequencies could be better for your chip—perhaps try 1.2v and observe the results.
I could detect a faint gurgling sound, thinking it was due to my dad’s lack of tech knowledge. He kept it near the radiator under the block. I positioned it correctly for about two hours before turning it on to check for air pockets, but it only seemed like air in the system.
Even without a functioning pump, the CPU shouldn't immediately reach 90°C after power-on. The component contains some thermal inertia, meaning the temperature will rise gradually instead of jumping. It's important to verify that the cooler was properly reinstalled. Take out the CPU block and inspect the thermal paste application. If everything looks correct, the issue likely lies with the air conditioner unit itself.