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H370 Fatality New Build Powers On/Off wont POST

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jokab View Drop Down
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    Posted: 01 Oct 2021 at 7:30am
This is a new one for me.

I am upgrading my mobo, so went with the H370 Fatality to go with my i5 8400 cpu. This isn't my first go around with upgrades and I installed everything like the manual and videos have said. Lights came on, hit the power button, fans came on, lights looked a bit different and after a bit of time, the system powered off. then a couple of seconds late, powered back on again to loop in this cycle.

I have made sure that the prongs are straight, have unplugged and re-plugged in everything multiple times. I plugged in the 8, or 6+2 power next to the CPU, though that doesn't even start the on/off cycle when I try to power on, so i have since removed that plug in. I've tried to use the different cpu fan plug ins. I have tried reseating the CPU and cleaning it from extra thermal. I'm almost at my wits end here with configuring this and am about to take it to a PC shop.

PSU was taken from my old build and has had zero problems. Used it just before starting the new build to be certain and it is clean.

I have also tried reseating my RAM, as well as utilizing A2/B2, just A1 and trying all the slots with stick combinations.

I'm wondering if the PSU isn't compatible, which I would find weird. Or if the CPU fan has to be attached in a certain way that would register on the MOBO.

Keeping it basic without the Graphics Card, here is my setup:

Intel i5 8400
Oloy DDR4 3200 x4
512Gb SSD - M.2 slot
Corsair CX 750M - MFG.PART: CP-9020061-NA
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 2021 at 3:32pm
The 8pin for the CPU is a 4+4 not a 6+2, that is PCIe power and is not electrically
compatible with the 8pin CPU connector.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jokab Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2021 at 1:32am
I appreciate the input and i figured that out this morning! It's updated and up and running.

Thank you for the response!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2021 at 1:54am
Glad to hear it, enjoy the upgrade
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