Technical Snapshot

The Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) is a server-grade DDR5 RDIMM memory module designed for enterprise servers and workstations. Running at 6,400 MT/s, The module provides 128GB of DDR5 memory . this module targets server deployments, virtualization hosts, and high-availability computing environments requiring ECC error correction.

Use Case
Server deployments, virtualization, high-availability computing
Compatibility
RDIMM-compatible server motherboard
Category
DDR5 RDIMM — Kingston System Specific Memory
KINGSTON
Kingston RAM
Kingston System Specific Memory

Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) (KCS-UC564D4-128G)

DDR5 · RDIMM · 6,400 MT/s · 128GB

Memory transfer rate in megatransfers per second. Higher MT/s provides more bandwidth for CPU-bound workloads.
Speed 6,400 MT/s
Total kit capacity across all modules. Dual-channel kits double memory bandwidth.
Capacity 128GB
DDR generation. DDR5 offers higher bandwidth and capacity than DDR4, but requires a DDR5-compatible motherboard.
Type DDR5
MPNKCS-UC564D4-128G
EAN740617349092
CategoryMemory
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Memory Specifications

Memory TypeDDR5
Form FactorRDIMM
Total Capacity128GB
Speed6,400 MT/s
ECCYes

Full Specifications

Data sourced from Kingston product specifications
Memory
Product LineSystem Specific Memory
Memory TypeDDR5
Form FactorRDIMM
Total Capacity128GB
Module Count1
Module Capacity128GB
Speed6,400 MT/s
Timings & Voltage
ECCYes
Product
BrandKingston
MPNKCS-UC564D4-128G
EAN740617349092
Variant2Rx4
Physical
Weight0.050 kg (estimated)
Package Dimensions14 x 8 x 1 cm (estimated)

Support

Kingston Memory Compatibility ToolCheck motherboard compatibility for this module
Kingston Support →
Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) DatasheetPDF · Technical specifications
Kingston Support →
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Frequently Asked Questions

What systems is this memory compatible with?

The Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) is RDIMM server memory with ECC error correction. It requires a server or workstation motherboard with RDIMM support. NOT compatible with standard desktop motherboards. Check your server's QVL (Qualified Vendor List) for compatibility.

What speed does this memory run at?

The Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) runs at 6,400 MT/s. This is a JEDEC standard speed that works automatically without BIOS configuration.

Can I add more memory later?

Yes, the Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) is a single 128GB module. You can add additional compatible DDR5 RDIMM modules to populate empty slots. For best performance, use matched modules of the same speed and capacity to enable dual-channel mode.

Does this memory support ECC error correction?

Yes, the Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS) includes ECC (Error-Correcting Code) support, which detects and corrects single-bit memory errors. This is essential for servers, workstations, and mission-critical applications where data integrity is paramount.

Where can I find technical support?

Visit the Kingston support website for compatibility tools, firmware updates, and technical documentation for the Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS).

JSON-LD Structured Data — Product + Breadcrumb
Product: Kingston 128GB DDR5-6400 ECC Registered RDIMM 2Rx4 (Cisco UCS)
MPN: KCS-UC564D4-128G
Schemas: Product + BreadcrumbList
Properties: 8 additionalProperty entries
Related: 4 isRelatedTo links