New ram crashes PC

[ASH_1989]

I currently own a 4 gb Corsair ValueSelect 4GB (1x 4GB) 1333MHz DDR3 RAM (CMV4GX3M1A1333C9) the issue is ive gotten ta new ram and its the same as the previous one as in ( just corssair) i tried to fit in and my pc crashed . i removed it and the pc works fine with the old ram , then i removed my orignal ( old one) ram and replaced it with the new one i got and it worked flawlessly but both don't work together .... both are same company same fsb speed same model

 

[Mattib 050]

Some sticks of RAM just won't work together, even if they're the exact same model. That's why manufacturers sell memory in kits, instead of as separate sticks.
So there's really nothing you can do about this if it's the sticks. Try using a single stick in different slots, and see if it still crashes. If it does then it could be a motherboard issue, otherwise it's just the sticks not working together.

 

[Tradesman1]

Try raising the DRAM voltage to 1.56 to stabilize the two sticks together