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Eight black DDR5 registered ECC RDIMM modules in a row

G.SKILL

G.SKILL F5-6400R3239G48GE8-ZR5NK 384GB 8x48GB DDR5 6400 CL32 Registered ECC server RAM

SKU CH-40RP-P5SRR MPN F5-6400R3239G48GE8-ZR5NK

Eight 48 GB DDR5 registered ECC modules running at 6400 MT/s with CL32 timing for AMD Threadripper workstations

  • Capacity384GB (8 x 48GB)
  • Type288-Pin PC RAM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL32
  • Timing32-39-39-102
  • Voltage1.40V
  • 384 GB octa-channel capacity scales Threadripper workloads
  • Registered DDR5 6400 with CL32 timing accelerates data throughput
  • On-die and side-band ECC protects critical server data
  • AMD EXPO profile enables one-click 6400 operation
  • Dedicated temperature sensors monitor module health continuously

384GB Octa-Channel DDR5 Kit

This G.SKILL Zeta R5 Neo kit delivers 384GB across eight 48GB registered DDR5 modules. It targets workstations built on AMD Threadripper 7000WX series processors with WRX90 motherboards. The memory runs at DDR5 6400 with CL32 latency and on-die plus side-band ECC. It is not suited for consumer platforms or boards lacking eight-channel support.

Registered ECC Build with EXPO

Each 288-pin RDIMM operates at 1.40V and carries a dedicated temperature sensor for thermal monitoring. The black heatspreaders contain no LEDs. AMD EXPO profiles load the 32-39-39-102 timings automatically on compatible WRX90 firmware. Registered buffering and ECC add latency overhead that benefits data integrity over raw throughput.

DDR5 6400 Platform Limits

The DDR5 6400 speed and octa-channel layout require a Threadripper 7000WX CPU and WRX90 chipset with all eight channels populated. Consumer Ryzen processors and mainstream chipsets cannot address this capacity or channel count. Builders needing fewer channels or lower capacities should select a different kit.

Highlights

  • 384 GB octa-channel capacity scales Threadripper workloads
  • Registered DDR5 6400 with CL32 timing accelerates data throughput
  • On-die and side-band ECC protects critical server data
  • AMD EXPO profile enables one-click 6400 operation
  • Dedicated temperature sensors monitor module health continuously

Specifications

BrandG.SKILL
SeriesZeta R5 Neo Series
ModelF5-6400R3239G48GE8-ZR5NK
Capacity384GB (8 x 48GB)
Type288-Pin PC RAM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL32
Timing32-39-39-102
Voltage1.40V
ECCYes
Buffered/RegisteredRegistered
Multi-channel KitOcta Channel Kit
BIOS/Performance ProfileAMD EXPO
ColorBlack
Recommend UseAMD Threadripper Compatible / AMD WRX90
LED ColorNone
Shipping weight0.36 kg
Package size254 × 178 × 38 mm

Questions about this item

Does the DDR5 6400 speed run at its rated 6400 MT/s with AMD EXPO on a Threadripper 7000WX system?

Yes, the kit is AMD EXPO profiled for DDR5 6400 (PC5 51200) and is designed for Ryzen Threadripper 7000WX processors on WRX90 motherboards with 8-channel support.

What motherboard and slot requirements must be met to install all eight 48 GB modules?

An AMD WRX90 motherboard with eight 288-pin DDR5 DIMM slots is required to populate the full octa-channel 384 GB kit.

How do I enable the rated CL32 32-39-39-102 timings at 1.40 V during installation?

Install all eight registered ECC RDIMMs into the eight-channel WRX90 board, enter the BIOS, and select the AMD EXPO profile to apply the 6400 MT/s speed, CL32 timings and 1.40 V voltage automatically.

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