Dual Channel Q

[Doory]

The question is simple .
2x1GB 667mhz will work with 2 more 512mb 667mhz ? If yes , do I have to sit them somehow or just plug all of them in the slots?
I'm asking because I didn't got them yet to test , so i'm asking you to be sure . Thanks in advice.

 

[Tradesman1]

No guarantees when mixing DRAM, they might play they might not, best to get full amount you want in a single package