Crashes every 5-15 minutes

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   CPU: AMD Ryzen 5 2600X
Mobo: ASRock B450M Pro4
GPU: Radeon R9 290 (Club3D royalKing)
RAM: 2x8GB DDR4 3200MHz (XPG Gammix D10)
PSU: 650W (Thermaltake SPR-065F-R)
Storage: 250GB NVMe SSD (WD Blue SN550)

I'm encountering issues somewhat similar to this guy: [URL=http://forum.asrock.com/forum_posts.asp?TID=10819&title=b450m-pro4-ryzen-5-2400g-constantly-crashing]B450m Pro4, Ryzen 5 2400G constantly crashing[/URL]

Windows 10 installs just fine. However, when I do anything that taxes the system even remotely, the computer either fully reboots (i.e. the screen goes black for a couple seconds, fans ramp up, then the BIOS splash screen appears) or will completely freeze (can't even move the mouse) forcing me to power off. No blue screen or anything; reliability monitor only recognizes these events as as "Windows was not properly shut down".

I've tried:
Swapping the PSU and reseating all power connectors
Swapping the GPU
Reapplying thermal paste
Disabling CPU turbo boost
Enabling XMP (which set RAM to 3200 MHz)
Disabling XMP (which set RAM to 2666 MHz)
Reinstalling Windows
Running Memtest86 (with and without XMP enabled at 4 passes each; no errors for all 8 passes)
Booting with 1 stick of RAM at a time
Reseating the CPU
Downgrading the BIOS from v4.30 to v3.50 (as v3.60 and above is not recommended for Summit Ridge CPUs)

At this point the only other things I can think of are swapping the CPU or the motherboard, but unfortunately I don't have spares of either. As I mentioned, it tends to crash every 5-15 minutes, but in case it matters, here are some specific events that have caused crashes:
Idling on the desktop after a fresh install, no programs open
Installing Radeon drivers
Unplugging/plugging in a USB device
Opening a web browser

Other miscellaneous notes:
This build is a gift for a coworker's 10 year old son, and I let him help me build it. When I started disassembling things to test the components, I noticed he overtightened the CPU heatsink, and the pre-applied paste on the Wraith Spire had spilled out the sides a bit. I've cleaned this up and I checked the CPU for bent pins (there weren't any)
Initially the CPU temps were fluctating a lot and getting quite high (from 30 up to 60 while idling), but after reapplying the thermal paste it's down to 30-40 on idle
As mentioned, Windows installations complete without issue (I've done 3 at this point)
Haven't noticed any crashes when running Windows in safe mode

Any suggestions would be greatly appreciated.

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Chachamara Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 26 Jan 2021 Location: Canada Status: Offline Points: 9	Post Options Post Reply Quote Chachamara Report Post Thanks(0) Quote Reply Posted: 26 Jan 2021 at 3:11am
	CPU: AMD Ryzen 5 2600X Mobo: ASRock B450M Pro4 GPU: Radeon R9 290 (Club3D royalKing) RAM: 2x8GB DDR4 3200MHz (XPG Gammix D10) PSU: 650W (Thermaltake SPR-065F-R) Storage: 250GB NVMe SSD (WD Blue SN550) I'm encountering issues somewhat similar to this guy: [URL=http://forum.asrock.com/forum_posts.asp?TID=10819&title=b450m-pro4-ryzen-5-2400g-constantly-crashing]B450m Pro4, Ryzen 5 2400G constantly crashing[/URL] Windows 10 installs just fine. However, when I do anything that taxes the system even remotely, the computer either fully reboots (i.e. the screen goes black for a couple seconds, fans ramp up, then the BIOS splash screen appears) or will completely freeze (can't even move the mouse) forcing me to power off. No blue screen or anything; reliability monitor only recognizes these events as as "Windows was not properly shut down". I've tried: Swapping the PSU and reseating all power connectors Swapping the GPU Reapplying thermal paste Disabling CPU turbo boost Enabling XMP (which set RAM to 3200 MHz) Disabling XMP (which set RAM to 2666 MHz) Reinstalling Windows Running Memtest86 (with and without XMP enabled at 4 passes each; no errors for all 8 passes) Booting with 1 stick of RAM at a time Reseating the CPU Downgrading the BIOS from v4.30 to v3.50 (as v3.60 and above is not recommended for Summit Ridge CPUs) At this point the only other things I can think of are swapping the CPU or the motherboard, but unfortunately I don't have spares of either. As I mentioned, it tends to crash every 5-15 minutes, but in case it matters, here are some specific events that have caused crashes: Idling on the desktop after a fresh install, no programs open Installing Radeon drivers Unplugging/plugging in a USB device Opening a web browser Other miscellaneous notes: This build is a gift for a coworker's 10 year old son, and I let him help me build it. When I started disassembling things to test the components, I noticed he overtightened the CPU heatsink, and the pre-applied paste on the Wraith Spire had spilled out the sides a bit. I've cleaned this up and I checked the CPU for bent pins (there weren't any) Initially the CPU temps were fluctating a lot and getting quite high (from 30 up to 60 while idling), but after reapplying the thermal paste it's down to 30-40 on idle As mentioned, Windows installations complete without issue (I've done 3 at this point) Haven't noticed any crashes when running Windows in safe mode Any suggestions would be greatly appreciated.