i have 3x 2gb 1333 mhz and i want to buy 1x 8gb 1333 mhz

Solution
There are no guarantees. In principle, it should work, but mixing memory is always a little risky.

Depending on the motherboard/CPU, the effect on multi-channel operation may vary. But it shouldn't be problematic with regard to performance.
There are no guarantees. In principle, it should work, but mixing memory is always a little risky.

Depending on the motherboard/CPU, the effect on multi-channel operation may vary. But it shouldn't be problematic with regard to performance.
 
Solution