Hi everybody, I'm obviously new here but I was hoping someone with better knowledge of the Power Mac G5 could help me out with a problem I am having. I have two different logic boards for a Power Mac G5. The EEE code and part numbers are as follows: Logic Board 1: EEE Code: SML Part Num: 661-3585 Other Num: 630T6907 (I don't know what this number signifies) Logic Board 2: EEE Code: SMJ Part Num: 661-3584 Other Num: 630T6906 (Again, I don't know what this number is for) My question is this; what configurations can I use these boards as replacements in? I'm looking at 3 PowerMacs right now but none have matching EEE codes. I listed the EEE codes and the type of machine they are below. PowerMac 1: EEE code: Q5M Single 1.8GHz G5, 1GB Ram Power Mac 2: EEE code: ROR Dual 2.5GHz G5, 1GB Ram Power Mac 3: EEE code: Q6E Dual 2.0 GHz G5, 4GB Ram, Bought in late 2003 So, if it is impossible to use these logic boards as replacements in any of the above mentioned systems, which systems are they actually good for? I understand there may be system bus speed differences for one. But is there some sort of reference for these EEE codes such as a table or chart? Or possibly a compatibility list or description table with features for each board? Thanks for any help, it is greatly appreciated.