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LENOVO 4X77A81443 128GB 4RX4 PC5-4800 16GB-A

Mfg Part Number:  4X77A81443  
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Price: $12,585.78 + Free Shipping
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Last Updated: Apr 18, 2026
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ThinkSystem TruDDR5 and TruDDR4 memory delivers trusted, tested, quality, performance, and reliability throughout the ThinkSystem portfolio. We use the highest quality industry-standard memory components sourced from Tier 1 DRAM suppliers. Only memory that meets these strict requirements are selected for memory in Lenovo servers. It is then compatibility tested and tuned on every ThinkSystem server to maximize reliability.

In addition, Lenovo memory DIMMs for servers have a unique signature programmed into them so your system can verify that TruDDR5 and TruDDR4 memory is installed in your system. Since the memory will be authenticated, memory stretch goals are enabled only when TruDDR4 memory DIMMs are detected. Together with lower power consumption, these new DIMMs can provide the lowest TCO for data centers.

High Performance Memory

Lenovo offers high-performance and high-capacity memory options in ThinkSystem servers.

Performance+ Memory

Memory intensive workloads needing a competitive advantage will benefit from Lenovo's Performance+ memory. Lenovo engineers worked in partnership with leading memory suppliers to develop and tune ThinkSystem servers enabling them to exceed the latest industry standard for memory performance

In ThinkSystem V3 servers with 5th Gen Intel Xeon Scalable processors, Lenovo's Performance+ memory delivers increased memory speed at up to 4800 MHz with two memory channels populated.

Persistent Memory

Lenovo ThinkSystem servers configured with Intel Optane Persistent Memory transforms the memory/storage hierarchy enabling faster insights from data. This breakthrough technology delivers large capacity, high speed, affordable memory with data persistence and advanced encryption capabilities. These modules significantly increase the capacity of available system memory, keeping more hot data closer to the CPU, and enabling greater operational efficiency by processing larger data sets with more user instances

Main Specification
General Information
Manufacturer Lenovo Group Limited
Manufacturer Part Number 4X77A81443
Manufacturer Website Address http://www.lenovo.com/us/en/
Brand Name Lenovo
Product Name 128GB TruDDR5 SDRAM Memory Module
Product Type RAM Module
Technical Information
Memory Size 128 GB
Memory Technology TruDDR5
Memory Speed 4800 MHz
Memory Standard DDR5-4800/PC5-38400
Memory Rank Quad-rank
Signal Processing Registered
Device Supported Server
Physical Characteristics
Number of Pins 288-pin
Form Factor DIMM
Miscellaneous
Compatibility

Lenovo Servers:

  • S R635 V3 (7D9H / 7D9G)
  • S R655 V3 (7D9F / 7D9E)
  • S R645 V3 (7D9D / 7D9C)
  • S R665 V3 (7D9B / 7D9A)
  • S R675 V3 (7D9Q / 7D9R)
  • S D665 V3 (7D9P)
  • S D665-N V3 (7D A Z)
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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