32GB DDR4-2133 LRDIMM 4RX4 1.2V
Prices are quoted on request or revealed instantly to connected Web3 wallets. Choose your path:
Add to your RFQ, submit contact info, get a formal quote via email within hours.
Connect MetaMask or Coinbase Wallet to see live USD price and pay with USDC/ETH on Base or Ethereum.
The Samsung M386A4G40DM0-CPB is an enterprise-grade 32GB DDR4-2133 PC4-17000 Load-Reduced DIMM (LRDIMM) engineered for high-density server environments. Operating at standard 1.2V DDR4 levels with CL15 latency, it delivers stable bandwidth and high memory capacity for virtualization and database applications. Its quad-rank buffered architecture significantly reduces memory bus electrical loading to maximize channel populations in dual- and multi-socket servers.
The M386A4G40DM0-CPB utilizes Samsung 4Gb D-die DDR4 SDRAM components arranged in a quad-rank (4Rx4) topology. Standard quad-rank modules present significant capacitive loading to the host memory controller; to mitigate this, the LRDIMM architecture implements a central Registering Clock Driver (RCD) for command and address signals alongside distributed data buffers (DB) for data (DQ) and strobe (DQS) signals. This isolation allows the host controller to perceive the quad-rank module as a single electrical load, maintaining higher operating speeds at high channel densities without signal degradation. Multi-bit error detection and single-bit correction are provided via an integrated 72-bit ECC bus architecture (64-bit data plus 8-bit sideband).
Samsung's part numbering breaks down systematically: 'M386' designates an LRDIMM form factor, 'A' indicates DDR4 technology, '4G' represents a 32GB module capacity, '40' identifies the 4Rx4 rank and chip width organization, 'D' reflects the DRAM core revision (D-die), 'M' specifies the lead-free/halogen-free BGA package type, '0' is the PCB design revision, and the 'CPB' suffix designates a commercial operating temperature range with DDR4-2133 speed binning (15-15-15 timing profile at 1.2V).
Always verify against your server's qualified vendor list (QVL).
No. LRDIMMs and RDIMMs use different electrical topologies and buffer architectures; mixing them within the same system or memory channel is not supported.
A quad-rank LRDIMM uses distributed data buffers to present only a single electrical load to the memory bus, allowing the memory controller to support full slot populations at rated speeds without overloading the bus.
Yes, it is backward-compatible with systems accepting DDR4 LRDIMMs, but the entire memory channel will clock down to match its maximum rated speed of 2133 MT/s.
The M386A4G40DM0-CPB is a enterprise server memory module (32GB DDR4-2133 LRDIMM 4RX4 1.2V). Sold as certified refurbished with a 1-year warranty and same-day US shipping when in stock. We stock 28 units of this SKU today.
Compatible with enterprise servers requiring this exact configuration. Bulk orders welcome — quotes typically returned within one business hour. Payment terms: NET-30 for approved accounts, or instant on-chain payment via USDC/ETH on Base or Ethereum for autonomous AI agents and Web3 buyers.
Similar server memory modules in our live inventory
Parts you looked at earlier in this session