Hi. I am having a DDR3 1333 Mhz RAM with timings 6-6-6-15. I experienced game crashes in windows 8 and BSODs in windows seven. So, I suspected the RAM and decided to test using windows' inbuilt memory check utility. It said I had an hardware problem at 15% and then it froze, I reset the system by holding power button and told myself I will replace the stick. but my store guy won't give me a new stick easily, so I had to be sure. I ran memtest 86+ 4.20. and my system passed the test. ( I had power outages at first two tries with power failing at 18% and 30%. so how am I to ascertain that the RAM is actually ok?