The problem with Ram and frequent lock your PC

[cosmin4]

Hello!
My problem is the following:
-Sometimes when I open a game and a few Windows programs simply freezes and can not do anything, but he is after a few seconds. I do not understand why is this problem. If you could let me know someone perfect would be mentioned.

System:
-AMD FX-6300 + Cooler Deep Cool Gammaxx 300
-MSI GTX 750 OC 1 GB
-Windows 7 x 64
-Ram 3 GB ddr3 1333 MHz (RAM on the old PC)
-Kinghston-120 GB SSD
-320 GB HDD
-Source 520W

I suppose it is because of this problem, ramilor I noticed that the ram is used in memorya task manager very much, more than 70-80%.
Plan to exchange one, but I would like to recommend me some good rami with 1600-1866.
Thanks!

 

[Swapnil kum]

You should upgrade the RAM. 3GB of RAM is not ideal for playing games. The OS will occupy more than 2GB RAM and you will have very less memory to run a game which causes the PC to freeze.

The memory clocks of the RAM do not matter much and the performance difference is very negligible in most of the cases. I would recommend Corsair Vengeance 1600MHz RAM, but you can go for other companies as well.