Intel core 2 quad Q9550

Solution
Depends on the motherboard, back in the core 2 days the memory controller was still on the motherboard. Some support DDR2 some support DDR3.

salerhino

Reputable
Mar 16, 2016
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Actually there are even hybrid boards
 

bignastyid

Titan
Moderator


Yes, there are some rare boards that have slots for both, but even on those you can only run one or the other you can't run both.