So my PC had 2x4 GB of RAM (Both sticks were exactly the same, 1.65V, 1600mhz, kingston, same CL), and i had problems when gaming for about 15 minutes the game would just freeze and only thing that would help was restart and the same thing would happen again soon. I removed one of the 4GB sticks and it solved the problem. Then i added 2x2 GB sticks(1333 mhz, 1.5V, Kingston. different CL) while having 1x4 GB already in PC and it would still give me the same freezing/crashing problem. 4 GB is definetly not enough, and would like to have at least 8 GB in my computer. And when i changed the slots i get to play a bit longer and then it still closes the game and gives me random errors. So any solutions?