Conflicting stress test results

[emdea22]

Greetings, I've been having some weird stability problems with some games lately so i decided to do some thorough troubleshooting.

I;ve run:

Prime95 - small FFTs 12hours - > passed
Prime95 -blend + Furmark for 8 hours -> passed
24 hour memtest86-> passed
Unigine Valley 12hours - > passed
Unigine Heaven 4hours - > passed
ASUS Realbench 15min -> failed (or not depending on where you look)

The problem is i get random crashes (rarely BSODs) in games that utilize multiple cores well like Project Cars, Crysis 3 and GTA 5.
As you can see above i've tested everything i could think of but can't replicate the crashes only in games. I did re-install windows 7 64 along with a full format of my HDD - which is fine btw - and still these problems persist. I decided to try realbench and surprise surprise, after 15 min i get "Result mismatch - system unstable HALT" but at the same time it says "Stress test passed". Is there any way i can find out more? Like where is the problem originating from? Is there even a problem? GPU or mobo+cpu related etc

TL'DR : Realbench says system unstable but at the same time stress test passed - which is it? GPU is r9 280x

[Conners]

You are using all of your memory. I bet it's not all available nor should it be. Try a lower memory value, which methinks is 4GB.

[demoncamber]

Result mismatch. System Unstable. HALT!

I'm getting the same message, but I'm using only 4gb to test, and that's not the problem. I have 16gb.