Update: I installed windows 10, didn't really bother with the hardware stuff, as i had a busy month, but a couple of days ago, I placed the 4 gb stick next to the 8 gb one. and it booted well, checked the specs, it said 12 gb memory available and 11.4 is usable, (because of the integrated graphics, i think). Tried it out with games, they ran significantly better, but now it does the same things, firstly random bsod, something with ntfs file, couldn't read it, restarted by itself, then a while later, while i was playing rl, another crash, but it didn't restart or turn off, just froze the whole system with a loud buzzing sound, had to restart it manually. i tried it again, booted well, i didn't play games, but started to download some other game. it was running the whole day, no crashes. yesterday i turned it on, started playing games, and it just went black, supposedly tried to restart, but couldn't. the fans never stopped, kept going, but windows didn't boot. I tried to restart it but couldn't. I removed the 4gb stick, it booted fine, I placed it back again in the second socket, booted, then after 30 secs just froze. I also tried to boot it with all tha ram sticks by themselves in the first socket, and they all worked. Now it has 8gb inside, and i'm pretty sure it is a damaged ram socket, but then why did it work for a couple of days?