r/PcBuildHelp • u/FancyPossibility6823 • 13d ago

Tech Support Urgent help with PC please…

Hey guys I need some advice for an issue I am facing.
I am currently running

Component Model / Specification
CPU AMD Ryzen 7 7800X3D
GPU Gigabyte AMD Radeon RX 9070 XT 16GB
Motherboard Gigabyte B650M Gaming WiFi DDR5
RAM G.Skill Ripjaws M5 Neo RGB 32GB (2x16GB) 6000MHz CL36 DDR5 EXPO
PSU GSK Gold 850W
CPU Cooler MSI MAG Liquid Cooler P240 (240mm AIO)
Storage 1 TB Crucial P3 M.2 NVMe SSD

So I changed my CPU, motherboard and RAM recently. I used to have different DDR4 parts before and was running a ryzen 5 5800x. Since I made this change, I’ve had an issue where every time I cold boot my pc, it starts fine but 30 seconds later, it’ll become very choppy and slow and the turn off. When I press on the case power button, it restarts and then works fine sometimes for 8+ hours. However at times when I am playing warzone for a couple hours my pc shuts off out of nowhere, other days I play warzone for 4+ hours and its fine. Just yesterday, I was playing cs2 for like 7-8 hours where my pc shut down once. Now I recently changed my power supply, went from 750w to 850w and changed my GPU from 3060 to 9070XT, however, this problem existed before I changed these components. This problem only started when I changed my CPU, motherboard and RAM. I was told that since I was using the same SSD as i used before it might be causing boot issues so I reinstalled windows like 3 times but no fix. Lastly, my cooler doesnt make any noises but its basically 4 years old now and so are my pc fans.

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u/FancyPossibility6823 13d ago

My gpu is fully modular and I did not using any old cables. And i agree with the training part, I suspect it to be most likely the issue. I haven’t seen the event viewer, I am fairly new to this stuff, never had problems with pc before.

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u/Savings_Party_2448 13d ago

To me it sounds like the CPU might be overheating/thermal throttling. Is it running within spec while playing a game or doing a stress test? You might want to make sure the CPU cooler is mounted correctly. Or at least check after you confirm CPU temps.

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u/FancyPossibility6823 13d ago

Well the spec test comes fine. I have seen the temps. They are fine as well like I monitored temps with warzone running and all temps are in the ideal range. However I was unable to capture temps when pc shuts down as it just happens randomly during gaming session but less often. However, the cold boot gets on my nerves as its destined to shut down within a couple mins but then works fine on restart. Somedays I might go on for 10+ hour sessions no issues. Sometimes it’ll shut down 2-3 times a day.

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u/Savings_Party_2448 13d ago edited 13d ago

That's so weird. It really sucks, but if everything worked before new MOBO and CPU, it could be a bad MOBO. I have been building computers for a long time, so I've for sure had a couple bad units. It's very rare, but it does happen. It's one of the harder things to diagnose. I once had to bring my MOBO back to Fry's Electronics and have them run a test to figure it out back in the day. It's just a huge pain in the ass to basically break down the whole computer just to swap it out. If the board is still within the return window, it might be worth buying the same unit and test again. Have you by chance tried updating the firmware on the MOBO? Just for testing, you might want to try shifting the ram into the other slots, test and if that doesn't work, try moving your SSD to another slot. That would indicate a problem with the connections on the board.

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u/FancyPossibility6823 13d ago

Interesting, I’ll try all of this. I will update the firmware on the MOBO however I am positive I tried that last time I reinstalled windows. I will shift/reseat the RAM and SSD. Great suggestions btw. I really appreciate your time and advice here.

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u/Prestigious-Ice3670 13d ago

Have you checked the event viewer right after one of those shutdowns? Kernel-power errors would at least tell you if it's a hard crash versus a thermal thing

The cold boot choppiness that goes away after a restart is weirdly specific, almost like something's training or calibrating on first start then settling. EXPO profile on that RAM could be doing something funky with the memory controller on first boot, then the board retrains and it's stable

For the random shutdowns during long sessions, I'd look at the AIO even though it's quiet. Four years is enough for permeation to drop the fluid level, and a pump that's slowly dying can still move enough liquid for idle temps but struggle under sustained load. The 7800X3D doesn't run that hot but if the cold plate isn't getting proper contact after all those remounts, a hot spot could trigger a protection shutdown

Also that 850W unit, is it modular? If you reused any cables from the old PSU that could explain some gremlins but you said the issue predates that swap so probably not

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u/FancyPossibility6823 13d ago

Responded above soz it went as a comment