Need major help. bsod

Wastert67

Honorable
May 5, 2012
70
0
10,640
after a windows 7 update i start getting bsod. so i decided to reinstall windows 7 but a stop screen will pop up during 50 percent mark. anyway after trying for an hour or 2 it finally was able to install after i took one of memory out. so i installed the memory back in and it shows in bios as 1333 where it is supposed to be 1600. anyway i need help understanding on how to know if my new build system is stable or not. was the ram the problem or it was just fluke. how do i know if it was the ram. what kind of test can i run. i heard of prime95 but i'm not sure where to download and how to operate. also with asrock extreme 4 i could just change the ram 1333 to 1600 with a click. is that safe?. any help will be appreciate. links to articles or such will be great as well.