IBM S822LC, Технический обзор и введение

Страница: 34 / 80

20
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