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v The server supports only industry-standard double-data-rate 3 (DDR3), 800,
1066, or 1333 MHz, PC3-10600R-999 (single-rank or dual-rank), registered,
synchronous dynamic random-access memory (SDRAM) dual inline memory
modules (DIMMs) with error correcting code (ECC). See http://www.lenovo.com/
thinkserver/ for a list of supported memory modules for the server.
v The server supports a maximum of 16 single-rank or dual-rank DIMMs.
v The server supports three single-rank or dual-rank DIMMs per channel. The
following table shows an example of the maximum amount of memory that you
can install, using ranked DIMMs.
Table 8. Maximum memory installation using ranked DIMMs
Number of DIMMs Number of ranks DIMM size Total memory
16 Single rank 4 GB 64 GB
16 Dual rank 4 GB 64 GB
16 Dual rank 8 GB (if available) 128 GB
188 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Hardware Maintenance Manual