Why did you initially test the RAM?
Also was the RAM set to XMP or no?
Is the RAM on your motherboards compatibility list? (This can be found on the support page for the mobo itself)
RAM get's 'paired' in the factory and as i wrote above its usually more ideal to buy in packs of either 2 or 4 ( just so you know for the future, google it and see)
You could of course just try running the machine with the RAM inserted and see how it fares?
I haven't heard of any. Memtest86 has been around for years and the go to app in these circumtstances.