Computer freezes up. What is the problem?

Question

Iron

Hello. Decided to upgrade my old computer. Intel core 2 duo e6420, geforce 8600gt, 2gb RAM, Asus P5B
mother
After the replacement, the computer worked on the strength of a couple of hours and then began to freeze tightly. First, with the old hdd, stuck in the ssd, it started up tightly in a minute. I installed another spare hdd, everything started up again, but after a minute it freezes tightly.
Could it be a power surge issue or something? As I understand it, drives die, because putting some other one, it works for a couple of minutes, and then falls off.
There was a PSU ascot a-420 2.01 at 400w, for the sake of interest I changed it to another one where 420w, but everything is the same.
Can someone tell me what's going on?
Thanks

Answer 1

Thank you all, the reason turned out to be in the RAM, I thought about it at the very last moment, because there was an idea that it should not have failed.
And the ssd and proc work, everything is fine ...

Answer 2

first look at the windows logs

Answer 3

Check the sata cable.
Change the sata port on the motherboard.
If after "re-plugging" the cable it worked, somewhere the cable was not plugged in

Answer 4

The new processor is noticeably more powerful in terms of power consumption.
The motherboard is old, and could not survive the increased load.