Question New Computer freezes after few hours

Nov 7, 2019
9
0
10
Hello guys,
I recently built my second PC and it's freezing after few hours (mostly after 3-4 hours).
I've checked temp. and they were all steady 60-70 C maybe when it goes high 80.
I thought it was motherboard problem, so I switched it but problem came back after few days.
Updated BIOS to most recent one, same thing.
I'm not sure what is causing this issue.
Please help me out to figure out this problem.
Thanks guys...

Spec:
ASUS ROG Strix B450-F Gaming Motherboard
EVGA 600 GD, 80+ Gold 600W
Corsair Vengeance LPX 16GB (2 X 8GB) DDR4 3000 (PC4-24000)
AMD Ryzen 5 3600 6-Core, 12-Thread
MSI Gaming GeForce GTX 1660 Ti
 
Nov 7, 2019
9
0
10
Nov 7, 2019
9
0
10
Just to be clear when you do fresh install don't forget to install motherboards drivers from their support site, chipset, ide/sata, lan and of course bios.;) https://www.asus.com/us/Motherboards/ROG-STRIX-B450-F-GAMING/HelpDesk_Download/
After formatting and all the updates, I left my computer to run for good 13-14 hours, doing something on and off.
Screen and sound froze about 0.5 sec once awhile, but other than that, no major issues.
I'm now trying to figure out why it froze periodically like that.
I am assuming my old SSD that I have been using for about 7 years now.
Do you have any other ideas?