CMM (DDR5)
Samsung CMM-D 128GB
CXL 2.0 memory expansion module adding 128 GB beyond DIMM channels
- Manufacturer
- Samsung
- Interface
- CXL 2.0
- Form factor
- E3.S 2T
- Category
- CXL Memory
- Series
- CMM (DDR5)
- Status
- Sampling
Image: samsung.com
128 GB CXL 2.0 memory module in E3.S form factor, expanding server memory capacity over PCIe 5.0 x8.
Capacities
Overview
What this part is for
The Samsung CMM-D attaches 128 GB of DDR5 DRAM to a server over CXL 2.0 on a PCIe 5.0 x8 link, adding capacity beyond what direct DIMM channels allow. In the E3.S 2T form factor it slots into standard front-serviceable NVMe bays.
Operating systems present CXL memory as a second NUMA tier, letting in-memory databases, caching layers, and inference services expand capacity without moving to larger socket counts. CXL 2.0 support positions the module for pooled-memory architectures as switch ecosystems mature.
Datasheet
Specifications
7 rows, factory-original data
| Interface | CXL 2.0, PCIe 5.0 x8 |
|---|---|
| Form Factor | E3.S 2T |
| Capacity | 128 GB |
| Media | DDR5 DRAM |
| Bandwidth | Up to ~32 GB/s per module |
| Features | Memory tiering, RAS telemetry |
| Target | In-memory DB, virtualization, inference |
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