DIMM Compatibility on rx3600 - AB565A Module

[rhinochris]

Hello,

We recently upgraded the RAM on our rx3600 and now the server will not boot.  We pulled the dimms out, reseated them and still no luck.  All the dimms are AB565AX - 2GB DIMMs but we did notice some different longer part numbers on the dimms:

2G1Rx4:               2GB 1Rx4 PC2-5300P-555-12-K3                

2G2Rx4:              2GB 2Rx4 PC2-5300P-555-12-L0                 

Is there a known compatibility issue with these different scews within the same AB565AX dimms?

Thanks in advance for your help.

Chris