Windows 10: Windows crashing when under light load

Hello,I have been experiencing some strange issues lately with my PC. The entire system crashes and either freezes entirely or restarts immediately while the computer is under a light load, but not while under a heavy load. In particular, it has crashes very frequently while watching YouTube or chatting with friends in Discord, but it has never crashed while playing any games. I have tried several things to fix the issues, including:Changing when the computer goes to sleep.Changing the minimum power threshold for the CPUUpdating WindowsRunning windows memory diagnostic toolChecking for upda

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all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?

 

all games crash!

ive watch my temps and both the cpu and gpu are within normal ranges. when it freezes it simply freezes the image and stops the sound. i must reboot to get back to windows.

 

Office And Light Gaming Build

There's nothing wrong with the build, but I have some suggestions to, IMHO, make it better:

• You list a 550 watt PSU, but you have a 51 watt CPU and a GPU that pulls 120 watts at the max. In other words, your system will pull under 200 watts at maximum load, which it sounds like will be rarely. PSU's are most efficient between 50-80%, and even at max load, this system won't reach 50%. Suggest a PSU 400 watts or less, like the Seasonic G-360.
• RAM's really cheap. Suggest getting 16 GB instead.