CPU overheating all of a sudden - i5 4670K + H100i

ZeeSteen · Mar 24, 2014

Hi guys,

To start of with, my CPU, cooling and motherboard:
Motherboard: ASUS Z87-A
CPU: Intel Core i5 4670K / 3.4 GHz (not OC'd at the moment)
Cooling: Corsair H100i

I've been using this build since the end of January and haven't experienced any problems with it.
I just booted my computer and I noticed how the fans were really loud, I tried to reboot it but it failed to boot as it gave me "Fan error: temperature too high".

I went into the setup and saw the CPU sensors spiked around 88 - 90 °C.. This is extremely high, I normally idle at 30°C..

Could this be due to faulty sensors? Or maybe one of the screws came loose...? I'll start by trying to fasten them a bit more..
Or maybe faulty coolingpaste? (I didn't have to apply any myself as the H100i comes with cooling paste preapplied, like most coolers do..)

s4in7 · Mar 24, 2014

The paste on the H100i is more than sufficient--I use an H100i with stock paste and see a maximum of 55°C on my FX-8320 at 4.8GHz.

It sounds like a faulty sensor if nothing else changed (like you didn't root around inside your case or install any new components), otherwise you may have knocked the CPU block and dislodged it a little bit. Try tightening up the screws (not too tight, they can strip the threads on the H100i) and making sure all your connections are intact (USB to USB header on mobo, CPU fan to CPU fan header, SATA to SATA cable, and fans plugged into the pump).

If that doesn't work, then go get you some aftermarket paste like Antec Formula 7 or Arctic Silver or something (they're all about the same), clean your CPU and the copper cold plate of the H100i with high-purity iso alcohol, put a rice or uncooked pea-size amount of paste right in the center of your CPU and tighten the heatsink nice and tight to spread it evenly.

Guest · Mar 24, 2014

Sounds like the water pump may have failed on that unit if the block still has good contact.

s4in7 · Mar 24, 2014

^that's always a possibility too.

tomClancy · Oct 6, 2014

i'm having the exact same issue from last night with exact same hardware just instead H100i i'm using H60......i did update the bios and observe 1 of 2 coolimg is bit hot and the block gets heated too...can anybody help me...thanks

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CPU overheating all of a sudden - i5 4670K + H100i

ZeeSteen

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s4in7

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Guest

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s4in7

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tomClancy

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