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- Description
- Specifications
95Y4808 is Lenovo's 32GB TruDDR4 Memory (2Rx4, 1.2V) PC4-17000 CL15 2133MHz LP RDIMM, feature code A5UJ. It is the largest RDIMM in the System x3500 M5 memory table, where the supported maximum is 24, or 12 per processor. Lenovo's x3500 M5 guide gives up to 768 GB of memory with 24 of these 32 GB RDIMMs and two processors. Each x3500 M5 processor has four memory channels with three DIMMs per channel. Dual-rank RDIMMs in that server run at 2133 MHz with one or two DIMMs per channel and at 1600 MHz with three. RDIMMs and LRDIMMs are both supported in the x3500 M5, but they cannot be mixed. Lenovo lists ECC, Chipkill for x4-based DIMMs, memory mirroring and memory rank sparing; Chipkill works only in independent channel mode. With mirroring, DIMMs go in pairs, at least one pair per processor, and both DIMMs in a pair must be identical in type and size. Rank sparing with dual-rank RDIMMs needs two per populated channel. The 16GB 2Rx4 RDIMM in the same table is 46W0796 (A5B7). To reach 768 GB the server needs both processors installed, so check the processor count first.
The 16GB 2Rx4 RDIMM in the same table is 46W0796; 95Y4812 is another Lenovo module in Memory (IBM / Lenovo).
| 95Y4808 Specs | |
| Capacity | 32 GB |
| Type | TruDDR4 RDIMM, low profile |
| Ranks | 2Rx4 |
| Speed | PC4-17000 CL15, 2133 MHz |
| Voltage | 1.2 V |
| Feature code | A5UJ |
| Server | System x3500 M5, max 24 (12 per CPU) |
| Speed by DPC | 1-2 DPC 2133 MHz; 3 DPC 1600 MHz |
| Max memory | 768 GB with 24 DIMMs |
| Mixing | not with LRDIMMs |
| 16GB 2Rx4 | 46W0796 (A5B7) |