My PC Keeps Shutting Down After Upgrading CPU, RAM, and Motherboard - Help!

November 30, 2025 2 answers
Asked by TechWiz1985
I recently upgraded my setup with a 7800x3d CPU, a BP650 Eagle AX motherboard, Crucial Pro overclocking DDR5 CL36 RAM, and a Cooler Master Hyper 212 Halo CPU cooler. The PC seems to idle fine when only the power cord is connected, but it shuts down whenever I try to access the BIOS or boot into an operating system, especially during the "getting device ready" screen. I'm at a loss for what could be causing the shutdowns. Any ideas?

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FixItFred01
It sounds like you might be dealing with a thermal issue. When the CPU gets too hot, it can cause shutdowns. Make sure the cooler fan is running properlyโ€”if it's not plugged in, that could be it. When you installed the cooler, did you check the thermal paste? If you had to re-install it multiple times without replacing the paste, it could create air pockets that trap heat. Maybe consider reapplying the thermal paste and see if that helps?

TechWiz1985: Yeah, I wasn't really sure about how much paste to use, and I did have to remove and re-attach the cooler a couple of times. Would it be worth taking it apart to add more thermal paste? I've noticed that it shuts down quicker each time I turn it back on.

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GamerGuy47
What's the power supply unit (PSU) you're using with this setup? Sometimes, insufficient power can cause random shutdowns when the components draw more power during initial use.

TechWiz1985: I'm using a Corsair RM850, so I thought I had enough power.

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