So I've been getting the occasional BSOD and it recently started getting a bit more frequent, so I decided to run a memtest86 over night to check if it's maybe the RAM causing it.
I got 1 error, so then I tested each stick, 1 by 1 (every new stick I would test I also put in a different slot) but I only tested first 3 sticks, thinking that the last one is faulty, since they all passed the test, but yesterday I decided to test the last one as well and that one passed as well. So now I'm confused, not sure what to do...
I was running on 3 sticks for 2 days and I didn't get BSOD, but that still means nothing because it was rare occurrence anyways.

Should I test all of the sticks again? Is there a better test I should be using instead?

(RAM is not OC'd btw)