Games crashing after installing new RAM

[hassanpk]

Hey guys

Come to the point straight,
My 1st ram is Kingston 4gb @1600mhz, 1.35v
I currently install a new ram which is Kingston 4gb @1333 mhz, 1.5v
The system is working perfectly fine without any crashes or restarts until I start a game
After starting a game, after 3 to 5 mins the game crashes to desktop OR system hangs, needs force restart OR just restart with some BSOD or sometimes without BSOD.
The 1st thing came into my mind is the compatibility of rams,
I check both rams separately, they work fine in solo, but when I pair them, they start causing problems for me
I think it is not a Happy Couple lol
Can I make them happy with some BIOS tweaks, or do I have to find the same as the 1st one

My system specs are
Pro: Core i5 3570 @3.4Ghz
Mobo: Asus P8H61 mle R2.0
RAM: Stated above 😉
GPU: Asus Strix RX480
PSU: Antec TP650w

Thanks

 

[hassanpk]

Anyone?

 

[mrtl321]

There might be a conflict somewhere since the voltages of your ram are different, but the system should account for the MHz difference on its own. Does the system work well if you only have one of the sticks in? So if you only have the 1333 in does that one work with out issues and if you swap no issues?