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IBM Power Systems S822LC for High Performance Computing
1.8.2 Memory placement rules
Each feature code equates to a riser card with four memory DIMMs.
The following memory feature codes are orderable:
16 GB DDR4: A riser card with four 4 GB 1600 MHz DDR4 DRAMs (#EM55)
32 GB DDR4: A riser card with four 8 GB 1600 MHz DDR4 DRAMs (#EM56)
64 GB DDR4: A riser card with four 16 GB 1600 MHz DDR4 DRAMs (#EM57)
128 GB DDR4: A riser card with four 32 GB 1600 MHz DDR4 DRAMs (#EM58)
The supported maximum memory is 1024 GB by installing a quantity of eight #EM58
components.
For the Power S822LC model 8335-GTB server:
It is required that all the memory modules be populated.
Memory features cannot be mixed.
The base memory is 128 GB with eight 16 GB, 1600 MHz DDR3 memory modules
(#EM55).
Memory upgrades are not supported.
Table 1-5 shows the supported quantities for each memory feature code.
Table 1-5 Supported quantity of feature codes for model 8335-GTB
1.8.3 Memory bandwidth
The POWER8 processor has exceptional cache, memory, and interconnect bandwidths.
Table 1-6 shows the maximum bandwidth estimates for a single core on the Power S822LC
server.
Table 1-6 Power S822LC single-core bandwidth estimates
Total installed memory
Memory features
128 GB
256 GB
512 GB
1024 GB
16 GB (#EM55)
8
32 GB (#EM56)
8
64 GB (#EM57)
8
128 GB (#EM58)
8
Single core
8335-GTB
2.860 GHz
3.259 GHz
L1 (data) cache
137.28 GBps
156.43 GBps
L2 cache
137.28 GBps
156.43 GBps
L3 cache
183.04 GBps
208.57 GBps
Summary of Contents for S822LC
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