Intel DH55HC - Manual (Page 37)

Installing and Replacing Desktop Board Components
37
Installing and Removing System Memory
Desktop board DH55HC has four 240-pin DDR3 DIMM sockets arranged as DIMM 0 and
DIMM 1 in both Channel A and Channel B.
NOTE
A DIMM must be present in at least one of the DIMM 0 sockets when you are using
only one or two DIMMs with a processor that does not support Intel Graphics
Technology.
Guidelines for Dual Channel Memory Configuration
Before installing DIMMs, read and follow these guidelines for dual channel memory
configuration.
Two or Four DIMMs
Install a matched pair of DIMMs equal in speed and size (see Figure 14) in the DIMM 0
(blue) sockets of channels A and B.
Figure 14. Example Dual Channel Memory Configuration with Two DIMMs
If additional memory is to be used, install another matched pair of DIMMs in the
DIMM 1 (black) sockets of channels A and B (see Figure 15).