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7X77A01303: Lenovo ThinkSystem 16GB TruDDR4 2666MHz (2Rx8 1.2V) RDIMM

Lenovo 7X77A01303 Memory2666 MT/s
LenovoMemory

Also listed as: 01KP641, AUMV, M393A2K43BB1-CTD, SP40M56470, 01KP640 · made by Samsung

The Lenovo 7X77A01303 is an enterprise 16GB dual-rank DDR4-2666MHz ECC registered DIMM engineered for first and second generation ThinkSystem servers. Powered by certified Samsung DRAM ICs, it features Lenovo TruDDR4 signature memory technology, allowing the system UEFI to verify authentic modules and enable optimized memory timings. Operating at a standard 1.2V, it delivers balanced memory bandwidth for multi-threaded virtualization and compute clusters. Used memory buyers should verify authentic Lenovo SPD strings and inspect the gold contact pins.

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Specifications

Part number7X77A01303
BrandLenovo
Made bySamsung
TypeMemory
Other numbers01KP641, AUMV, M393A2K43BB1-CTD, SP40M56470, 01KP640
Statuscurrent
Capacity16GB
TypeDDR4-2666 Registered DIMM (RDIMM)
Speed2666 MT/s (PC4-21300)
Voltage1.2V
RankDual Rank (2Rx8)
Generation fitThinkSystem V1 servers (Intel Xeon Scalable 1st & 2nd Gen)

About the 7X77A01303

7X77A01303 is Lenovo's mainstream 16GB TruDDR4 2666MHz registered SDRAM DIMM for first-generation ThinkSystem V1 servers. Built on a dual-rank x8 organization (2Rx8) running at 1.2V, it delivers reliable throughput and low thermal dissipation for standard enterprise database and virtualization hosts.

Compatibility

Compatible with first and second generation ThinkSystem servers including SR650, SR630, SR530, SR850, SR950, ST550, and SD530. Supports single and dual processor configurations across all available memory channels. Can be populated alongside other TruDDR4 2666MHz modules according to standard Lenovo DIMM population rules.

How to identify a genuine unit

The module features a green server DIMM PCB with a central Lenovo barcode label listing option part number 7X77A01303, FRU part number 01KP641, and feature code AUMV. Component chips bear Samsung DRAM markings (M393A2K43BB1-CTD). In UEFI setup and Lenovo XCC, the module reports authentic Lenovo TruDDR4 status.

Buying used

Inspect the edge connector fingers for scratches or contact burns. Confirm that the module is recognized as genuine TruDDR4 in UEFI rather than generic memory. Run a complete MemTest86 or Lenovo diagnostics memory cycle to ensure no correctable or uncorrectable ECC errors are reported during burn-in.

Reference prices (last 12 months, updated 2026-10-27)

Used: USD 35 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
ebay.comusedUSD 35Tested working genuine Lenovo TruDDR4 16GB 2666MHz RDIMM2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Check compatibility with Lenovo

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the Lenovo 7X77A01303.

Equivalent part numbers

FAQ

What processors support 2666 MT/s speed with the 7X77A01303 module?

Intel Xeon Scalable Gold and Platinum processors (Skylake-SP and Cascade Lake-SP) run this module at its rated 2666 MT/s speed.

Can TruDDR4 memory be mixed with generic third-party memory?

Yes, but mixing with non-Lenovo modules disables TruDDR4 signature tuning and custom memory alert telemetry.

Buying or selling 7X77A01303?

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.

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