Crucial Memory Won't Work With Old Help!

[scornduffer]

I just purchased two more gigs of Crucial Balistix 8500 DDR Memory for a total of four gigs.

I know the modules are good as the 2 old boots up and the 2 new boots up seperately but all 4 gigs won't work together.

The only difference in the number on the sticks is this, 16FD3 Old, 16DF5 New.

Please advise?

[scornduffer]

I have it working perfect now. I had to place the old in slots 1&2 amd the new in slots 3&4.:beer: