Problems with monitor

[opjonas]

I recently installed a new hard drive and added some ram to my computer.

Now i have a probelm, where my computer screen goes black whenever i use the computer for more than 3-4 hours. I can restart the computer, but then it takes maybe 30 minutes before they die out, and then 15 min and so on.
I suspect it may be the power supply, since i added new parts to the computer, but im not sure.

Please come with your opinions !

 

[opjonas]

my monitors are still turned on, and my computer still works. But they dont seem connect to eachother, whenever this happens

 

[Nathaniel_5]

The power supply should give enough power for both of your hard drive and RAM, because they doesn't need much.
My suspect is your RAM's problem, what RAM do you have there?]

EDIT : How much watts can your power supply provide?

 

[opjonas]

2x khx1600c9d3b1k2/4gx

From my brothers computer

the posersupply is 550 W

 

[opjonas]

Do you suggest i remove both of them? or maybe just one of them to test which one is bad?

 

[Nathaniel_5]

Do you suggest i remove both of them? or maybe just one of them to test which one is bad?

Diagnosing memory problems on your computer by running The Memory Diagnostics Tool.
go to
Control Panel > search box : memory >click Diagnose your computer's memory problems.‌