CPU hitting 90C+ idle?

[Paci]

I changed my thermal paste yesterday and temps were fine.

Played some games where my temp did hit mid 90s, but cooled down after I stopped playing.

Now today my temps are at 90C+. They'll drop down to high 60s and 70s, then shoot back up to 90s almost immediately. I'm so confused.

Looked at BIOS, fans are on performance setting. Temp is also the same in BIOS.
Paste used: Arctic Silver 5.

Build:
Intel Core i7-4790K (4x 4.0GHz)
ASRock Fatal1ty Z97 Killer
Corsair Hydro Series H55 AIO (dual fan, push-pull)
16 GB [8x2] DDR3-1600
Corsair RM850

OS: Windows 10

 

[kanewolf]

Then you didn't get the cooler set correctly, or didn't plug the pump back in, or your pump failed, something mechanical. Nothing else would do that.

 

[Yamitime]

You need to scroll down on the hw monitor picture to show your cpu core temps.

 

[Yamitime]

Then you didn't get the cooler set correctly, or didn't plug the pump back in, or your pump failed, something mechanical. Nothing else would do that.

Agreed its not fitted correctly.

 

[Paci]

Then you didn't get the cooler set correctly, or didn't plug the pump back in, or your pump failed, something mechanical. Nothing else would do that.

It's AIO, no pump. Just the radiator and mount. That's screwed in fine. Fans are secure and working. I can hear everything operating, so it's obviously running, but my CPU is overheating for some reason. This first happened 2 weeks ago, I reapplied thermal paste and things were fine until I started experiencing crashes due to overheating. I figured I applied too much paste so I redid it. Things were fine again until recently. Basically the same issue is occurring with overheating despite changing the paste and all components being functional.

 

[kanewolf]

An AIO has to have a pump. The pump is part of the CPU heatsink. But there is DEFINITELY a pump.

 

[Paci]

You need to scroll down on the hw monitor picture to show your cpu core temps.

For giggles I switched pins. My fan is a 3-pin, has always been plugged into the 3-pin CPU_2 header. Moved it over the CPU1 header which is 3pins but is compatible. Temps seem fine now (but I've seen this in the past where temps are fine for a day then go back to being 90C+). This is really weird to me as I've always had it plugged into the 2nd header, since I built it ~4 years ago.

 

[Paci]

An AIO has to have a pump. The pump is part of the CPU heatsink. But there is DEFINITELY a pump.

Assumed you meant a liquid pump/chamber. Yeah, there's 2 tubes/pumps that connect the heatsink to the radiator.

Anyway, here's an update:

For giggles I switched pins. My fan is a 3-pin, has always been plugged into the 3-pin CPU_2 header. Moved it over the CPU1 header which is 3pins but is compatible. Temps seem fine now (but I've seen this in the past where temps are fine for a day then go back to being 90C+). This is really weird to me as I've always had it plugged into the 2nd header, since I built it ~4 years ago.