4X77A08634: lenovo ThinkSystem 64GB TruDDR4 3200MHz (2Rx4 1.2V) RDIMM
Also listed as: 4X77A08634-01, 02DA220, SP47A08634, B8NV, M393A8G40AB2-CWE
64GB dual-rank DDR4-3200 registered ECC memory module delivering optimal capacity and performance for Lenovo ThinkSystem V2 enterprise servers.
Specifications
| Part number | 4X77A08634 |
|---|---|
| Brand | lenovo |
| Type | Memory |
| Other numbers | 4X77A08634-01, 02DA220, SP47A08634, B8NV, M393A8G40AB2-CWE |
| Type | DDR4 |
| Capacity (GB) | 64 |
| Speed mhz | 3,200 |
| Form factor | RDIMM |
| Rank | 2Rx4 |
| Voltage | 1.2 |
| Ecc | Yes |
About the 4X77A08634
The Lenovo 4X77A08634 is an enterprise-grade 64GB dual-rank DDR4-3200 registered ECC memory module. Designed to power memory-dense hyperconverged infrastructure, private cloud nodes, and in-memory analytical workloads, it provides maximum standard RDIMM bandwidth on 3rd Gen Intel Xeon Scalable and AMD EPYC 7003 series systems. It succeeded 2933MHz 64GB options as the enterprise standard.
Compatibility
Fully validated for Lenovo ThinkSystem SR650 V2, SR630 V2, SR645, SR665, SR850 V2, and ST650 V2 platforms. Backward compatible with older DDR4 ThinkSystem platforms, though speed adjusts down to the host processor maximum. It is completely incompatible with newer DDR5 systems like the ThinkSystem V3 generation and cannot be mixed with LRDIMMs.
How to identify a genuine unit
Identifiable by its Lenovo factory label displaying option code 4X77A08634, FRU number 02DA220, and feature code B8NV. Built using high-density 16Gb DDR4 dies, typically Samsung M393A8G40AB2-CWE or equivalent Micron ICs. Lenovo XClarity management identifies the module as authentic TruDDR4 memory, unlocking advanced memory tuning and error tracking features.
Buying used
When acquiring pre-owned 64GB DDR4 RDIMMs, ensure that the PCB is clean of flux residue and that all 288 pins show clean gold plating without scratching. Test each module across multi-threaded memory diagnostic suites to confirm stability at 3200 MT/s. Confirm that all DIMMs in a planned server build share identical rank and timing configurations.
Reference prices (last 12 months, updated 2026-10-15)
Refurbished: USD 165 (1 sighting, Sep 2026)
Used: USD 140 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| eBay | used | USD 140 | eBay sold listing | 2026-10-15 |
| IT Creations | refurbished | USD 165 | Tested clean working pull | 2026-09-20 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
- Lenovo ThinkSystem SR650 V2
- Lenovo ThinkSystem SR630 V2
- Lenovo ThinkSystem SR645
- Lenovo ThinkSystem SR665
- Lenovo ThinkSystem ST650 V2
Buying or selling 4X77A08634?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Lenovo Technical Reference - 4X77A08634, checked 2026-10-27
- Lenovo Technical Reference - 4X77A08634, checked 2026-10-27