What could be the reason for this behavior of the PC?

Question

linux

Previously, I created a question: why does the PC freeze when using the integrated vidyuhi.
But the "answer" accidentally found 20 minutes ago himself. In desperate attempts to figure out the reasons for the freeze, I completely disassembled the PC and decided to rebuild it (how it would help, I don’t know, but if I hadn’t done it ...)
In general, I assembled it, but forgot to plug in one of the RAM sticks - I start up and already 20 minutes does not hang (although earlier it did not work for 5 minutes, hung)
What is it? The plate is "broken"? But then why were there no problems with a normal vidyuhi? Or maybe the problem is that the dice of a different manufacturer were plugged into one channel?
I do not understand anything...

Answer 1

Integrated video uses discrete RAM and a discrete video adapter has on-board memory. Try first to clean the contacts of the memory module with an eraser and wipe it with alcohol or lighter gasoline, this often helps.

Answer 2

Check memory with MemTest

Answer 3

trash module.