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Chapter 2 Preparations
Checking DIMM
To check out the features of the DIMM, please refer to the label affixed to the DIMM, the following illustrations
and tables.
Number
1
2
3
4
5
6
7
74
Description
Meaning
8GB
Capacity
16GB
32GB
64GB
128GB
1R = Single rank
Rank
2R = Dual rank
4R = Quad rank
8R = Octal rank
X4 = 4 bit
DRAM data width
X8 = 8 bit
X16 = 16 bit
Memory generation
DDR4
2133 MT/s
The maximum speed of
2400 MT/s
2666 MT/s
the memory
P = CAS 15-15-15
CAS latency
T = CAS 17-17-17
U = CAS 20-18-18
V = CAS 19-19-19 (for RDIMM, LRDIMM)
V = CAS 22-19-19 (for 3DS TSVLRDIMM)
R = RDIMM (with register)
DIMM type
L = LRDIMM (low loading)
E = Unbuffered ECC (UDIMM)
Express5800/R120h-1M User's Guide
1. Installing Internal Optional Devices
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