have a msi g41m-p43 board, I put in one stick of memory ddr2 or ddr3 and get a post signal, put in two two sticks and it won't

[wink8888]

This is the problem, one stick of mem get post, two sticks no post

 

[cin19]

This is the problem, one stick of mem get post, two sticks no post

Yes, your MB can support either ddr2 or ddr3, but it can't support both ddr2 and ddr3 that install at the same time. That why the PC will not boot when you put two ( ddr2 and ddr3) sticks in it. Check the manual.

 

[wink8888]

I am only putting in two sticks of the same memory, I am not mixing ddr2 and ddr3