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CPU Extremely hot on bootup

by Spork829 / January 10, 2016 11:35 AM PST

I recently switched out my motherboard. I reapplied thermal paste and the heat sink is in the right place, but when I first turned on the machine the heatsink fan was insanely loud. after Windows booted up I opened up Open Hardware Monitor, and it showed my CPU core temps at around 90C!! My cooling is perfectly adequate; I do some pretty intense gaming on this machine and the CPU has never reached more than 65C, so something is obviously very wrong here. After reading some forums I think it may have something to do with the motherboard "overvolting" the CPU, because it gets really hot really fast. People say I need to edit or even reset the BIOS to fix this, which is something that scares me and I don't really trust myself to do. I noticed there's a switch labeled BIOS_Sel1 on the new motherboard that switches between A and B (came and still is set to A). Could this help? Any suggestions and/or solutions would be greatly appreciated. I'll probably just end up bringing the thing into my local Microcenter, but I want to know what I might be dealing with first. CPU: Intel i5 4460 Quad Core at 3.2 GHz. Motherboard: ASRock Z97 Extreme4.

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Clarification Request
(NT) What version board and BIOS?
by R. Proffitt Forum moderator / January 10, 2016 11:57 AM PST
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I honestly have no idea. Best way to find out?
by Spork829 / January 10, 2016 12:14 PM PST

Preferably without turning on the machine?

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This model i5 has thermal protection.
by R. Proffitt Forum moderator / January 10, 2016 12:32 PM PST

Unless the model CPU is not on the CPU support list for the board. I can't check that for you as there are revisions to the motherboard and well, I guess I could check all revs but this is something I leave to you to work.

Somewhere the board rev is on the board or box, so that and hit the maker's web sit for CPU support list. Then off to the BIOS to see if the version is current.

90C is hot but not meltdown yet.

There is a another exit. Just RMA both as defective.

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Found this:
by Spork829 / January 10, 2016 12:40 PM PST

I don't see my CPU on there and honestly I have no clue where the revision would be or what any of that means. Not sure if the BIOS is current either; the mobo itself is brand new but I never installed the disk with the drivers for it. I think I'll probably just take it in the Micro center and see what they can do, as I'm not great with this sort of thing.

All Answers

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by Bob__B / January 10, 2016 6:49 PM PST

Your mobo comes with a dual bios.
See page 26 of the user manual.

If your not comfortable with updating the bios, if needed, bring it into the shop and let them have a look at it.

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