i7 4790k high temps at idle and power offs on load. now system wont stay on.

Jul 7, 2018
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I noticed there is a similar thread where a member has the same CPU and issues I have but didn't want to derail his thread. However I have an all in one Corsair liquid cooler. Plus, trying to fix the original issue, now my PC powers off after 2 seconds.


This has got to be the most frustrating issue I've had yet since building my first system 10 years ago. I recently started playing Elite Dangerous and the game would randomly crash to desktop, sometimes hardlocking my system. I chalked this up to being the game. It wasn't. I used to religiously watch CoreTemp and it booted with my system. The past few months I have gotten out of that habit. So on the last Elite crash, I booted up CoreTemp to see the temps on my i7 4790k to be in the 80s with spikes to the high 90s. The last time I paid attention not even prime95 caused temps those hot and the system often idled in the 30s or 40s. It seems thermal throttling and safety shutdowns were the problem all along. Even at idle while doing nothing temps and wattage fluctuate from high 50s to high 60s.

I am using a Corsair H110GT all in one cooler. The first thing I did was drop down the overclock from 4.6 ghz to 4.4 which seemed to help prevent system lock ups but the temps were still very high. I could use the system at will and play fine but still saw high temps (high 70s and 80s) during play.

Today I thought about the Meltdown and Spectre issues that blew up about 6 months ago so I was watching videos on that and ran a suggested tool checking for it. Windows update had the Meltdown fix but apparently the one for spectre involves updating your mobo BIOS. Its trying to fix this that got me in my current instant power off predicament. I have an EVGA Z87 Classified mobo and google searched for their spectre related update that was apparently released this April. I ran the tool a few times seemingly to no effect since the system never powered off. Then I noticed one of the first steps was to reset settings to default in your BIOS. Its when I did this the real trouble beyond just heat set in. After resetting to defaults to properly run the update (from Windows instead of uploading from a USB) the system would boot to Windows and then randomly hardlock within a minute or two. I figured this was likely due to the defaults somehow affecting the Corsair dominatrix RAM that I had running at 2400 mhz prior to all this mess so I went back into BIOS to increase the voltage and clocks the system was running at stable prior to the hardlocks. Now the system won't even boot to BIOS. It will cut on, then power off within 2 seconds before I can even access the BIOS to change any setting that made things worse.

So 2 things. 1. What is possibly my original thermal issue? Could my all in one cooler pump be dead? The fans are clearly working but not sure whats going on with temps. 2. What did I possibly mess up in BIOS to where now the system wont even stay on 2 seconds and what how can I even change settings since I cant get to bios in the first place?

Thanks a bunch for any help.

 
Jul 7, 2018
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Got the random hardlocks resolved. pretty sure it was the BIOS stock settings trying to run an incompatible speed on the ram I have. I'm still having the heat issues though. Is there anything else this could be other than a dead pump? The AIO cooler is a little over 3 years old.