Dell PowerEdge C6220 - Manual (Page 223)

Installing System Components | 223
System Memory
Each system board has sixteen DDR3 memory module slots for the
installation of up to sixteen unbuffered or registered DDR3-1333MHz
(1600MHz @2 memory modules per channel) memory modules to support
processor 1 and processor 2. See “System Board Connectors” on page 309
for the location of the memory modules.
Memory Slot Features
 Support 8 channels, 16 UDIMMs/RDIMMs of DDR3
 Speed up to 1600MT/s
 Max. capacity: 512GB with 32GB RDIMM, LRDIMM
 Support DDR3/DDR3L
 Support ECC
Supported Memory Module Configuration
For the sequence of the sixteen memory-module slots, see Figure 3-53. The
system requires at least one memory module installed on processor 1’s
DIMM slot 1 in order to be booted up. When you insert the memory
module(s), always start with CHA_A1. The optimized memory module
installation sequence is 1/2/3/4/5/6/7/8.
See Table 3-2 and Table 3-3 for possible memory configurations.