Memory compatibility

Hello everyone, i need a bit help, please.. Im building a new machine.
I just bought 2x. CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 15000) Desktop Memory Model CMZ8GX3M2A1866C9

I want to get 8GB more... but I want to get better ones.. like this
CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 Desktop Memory Model CMZ8GX3M2A2133C11R

I fear i might have compatibility issue... i haven't built a machine from scratch in a while, so I don't wanna do any mistakes..

I got AsusSabertooth 990FX.
Computer will be used for gaming mostly.

Thank you.
3 answers Last reply Best Answer
More about memory compatibility
  1. Best answer
    example : if u insert 1600mhz x1 ram run at 1600mhz ; 1600mhz x1 + 2100mhz x1 both run at 1600mhz because 1600mhz ram not support 2100mhz so to decrease blue screen error mobo auro config both at 1600 mhz. if u oc 1600mhz ram to 2100mhz u get blue screen error.
  2. equal mhz but different company is not a problem. so buy 1866mhz ram x2. or sell the 1866mhz x2 ram then buy x4 2100mhz ram.
  3. Best answer selected by StormT451.
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