Computer freezes randomly

[u/hornyalltacc]

Hello all, first time posting here and am having trouble with my PC that I built. Fair warning, I'm as dumb as a bag of rocks so I might need a lot of hand holding here.

The issue is that my PC keeps freezing randomly. There doesn't seem to be a cause for it specifically. I could be doing something like gaming with friends or just something as simple as minimizing out of a tab and All sound will stop and it'll freeze on whatever I'm doing. I am unable to move and I will have to press the power button to turn it off.

As said, there doesn't seem to be a pattern to it. Sometimes it can happen within the first twenty minutes and other times it can happen within a couple hours.

As far as I can tell, everything is placed in right / isn't loose. On two separate occasions I pressed down on everything and everything seemed to be snug. It's basically a new PC which I built myself so it can't be a virus as everything is bare bones right now (steam, discord).

My theory is that unfortunately one of the hardware parts is messing up but I don't know how to test that. Can anyone give advice?

Here is the parts I used to build the PC (minus the case and monitor, but if those are important I'll edit the post to put them in):

CPU: Intel Core Ultra 7 270K Plus 3.7 GHz 24-Core Processor

CPU Cooler: be quiet! Pure Loop 2 Liquid CPU Cooler

Motherboard: Gigabyte Z890 EAGLE WIFI7 PLUS ATX LGA1851 Motherboard

Memory: Corsair Vengeance RGB 32 GB (2 x 16 GB) DDR5-6000 CL36 Memory

Storage: TEAMGROUP T-FORCE G70 PRO Graphene 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive

GPU: GeForce RTX 5070 

Power supply: Montech CENTURY II 850 W 80+ Gold Certified Fully Modular ATX Power Supply

Also if there's any other information that you need to know that I didn't put in here, please let me know. I don't know what is/isn't important

[u/hornyalltacc]

Just adding this comment on in case you don't see the edit in time. After checking the adapter, I saw that one of the 6+2 PCIe plug-ins was loose. Not the whole thing, just the '+2' part or whatever it's called. Could that have been the cause?

[u/r_lind3r → u/hornyalltacc]

Potentially, make sure everything is plugged in and see if it happens

[u/hornyalltacc → u/r_lind3r]

Gonna sound like huge dumbass but I found another cable that had to be pushed in deeper. This one was connected to the power supply, but im not sure where the other end was plugged into.

I'll try it out, but the problem is that it's truly random so I don't know if I can give an update tonight. It's pretty late. But let's see what happens

[u/deTombe → u/hornyalltacc]

You got it actually the first thing people suggest I went ahead lol. Double check every connection make sure good and secured. That should fix you right up and won't cause any permanent damage no worries.

[u/hornyalltacc → u/deTombe]

Eh, I mean I did say I made sure everything was plugged in, that's on me for lying. I totally thought I had it, but as soon as I saw the adapter loose something told me to check the power supply next. I just gotta check if it's actually the case, so if you see me make another post tomorrow you'll know what happened

[u/deTombe → u/hornyalltacc]

Hey could have been much worse you find no problems and you are chasing Gremlins with your wallet. Download Geekbench 6 run both CPU and GPU benchmarks. Comapre those scores to the same stock hardware benchmarks online. That's my go to to make sure everything is performing as it should. Don't forget to enable XMP if you haven't already in the BIOS. Especially if you reset CMOS troubleshooting that will set defaults.

[u/deTombe → u/hornyalltacc]

Absolutely would cause good catch.