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Four silver DDR5 RDIMMs with black heat spreaders, 48GB each

G.SKILL

G.SKILL F5-6400R3239G48GQ4-ZR5NK 192GB (4 x 48GB) DDR5 6400 CL32 ECC Registered server RAM

SKU CH-6EK4-X4DXB MPN F5-6400R3239G48GQ4-ZR5NK

A 192 GB quad-channel DDR5 RDIMM kit running at 6400 MT/s with CL32 latency, ECC and AMD EXPO support for Threadripper workstations

  • Total capacity192 GB (4 × 48 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL32
  • Memory timings32-39-39
  • Rated voltage1.4 V
  • Buffer typeRegistered

Capacity 192GB (4 x 48GB)

Speed DDR5 6400 (PC5 51200)

  • 192 GB quad-channel capacity scales workstation memory headroom
  • DDR5 6400 CL32 timing delivers high-throughput registered performance
  • ECC registered design protects data integrity under sustained loads
  • AMD EXPO profile enables one-click overclock tuning on Threadripper 7000
  • On-die and side-band ECC plus thermal sensors enhance reliability

192GB quad-channel DDR5 RDIMM kit

This 192GB kit contains four 48GB registered DDR5 modules rated at 6400 MT/s with CL32-39-39 timings at 1.40V. On-die and side-band ECC protect data integrity for professional workloads. The modules target AMD workstation platforms that accept registered memory.

Requires TRX50 motherboard with four-channel support

Installation demands a compatible AMD TRX50 motherboard that enables quad-channel operation for the full 192GB capacity. The registered design reduces electrical load on the memory controller, allowing dense population. AMD EXPO profiles simplify configuration on supported firmware.

Sustained operation monitored by on-module sensors

Dedicated temperature sensors on each module provide thermal feedback during extended compute tasks. The 1.40V operating voltage and registered buffering help maintain signal stability across all four channels under continuous load. ECC correction runs transparently throughout long sessions.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,223.99
Pricier than about 82% of the 6,523 comparable items (median $188.99).
Total capacity 192 GB (4 × 48 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $6.37 per GB
Cheaper than about 60% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameG.SKILL
Product lineZeta R5 Neo series
Model nameF5-6400R3239G48GQ4-ZR5NK
Total capacity192 GB (4 × 48 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Memory
CAS latencyCL32
Memory timings32-39-39
ECC supportYes
Buffer typeRegistered
Kit configurationQuad Channel Kit
Power
Rated voltage1.4 V
Size & build
Shipping weight0.23 kg
Package size244 × 178 × 24 mm

Other versions of this model

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Questions about this item

Will the CL32 latency hold under sustained heavy workloads?

The kit is rated CL32-39-39 at DDR5 6400 with 1.40 V; those timings are the guaranteed specification for continuous operation.

How much heat and power should I expect from four 48 GB modules running all day?

Each RDIMM operates at 1.40 V; total power draw and thermals depend on your chassis airflow and CPU load, but the modules include dedicated temperature sensors for monitoring.

Which motherboard and CPU combination is required for this quad-channel kit to function?

It requires a compatible AMD TRX50 motherboard with four-channel support and a Ryzen Threadripper 7000X series processor to enable AMD EXPO and ECC features.

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