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Four black DDR5 RDIMM sticks with silver heatspreaders

G.SKILL

G.SKILL F5-6400R3239G16GQ4-ZR5NK 64GB (4 x 16GB) DDR5 6400 CL32 ECC Registered server RAM

SKU CH-QFA3-2RP8S MPN F5-6400R3239G16GQ4-ZR5NK

Quad-channel kit of four 16 GB DDR5 RDIMMs running at 6400 MT/s with CL32 ECC Registered stability for AMD Threadripper workstations

  • Capacity64GB (4 x 16GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL32
  • Timing32-39-39
  • Voltage1.40V

Capacity 64GB (4 x 16GB)

Speed DDR5 6400 (PC5 51200)

  • 64GB quad-channel capacity for high-density workloads
  • DDR5 6400 speed with CL32 latency for responsive performance
  • ECC Registered design protects data integrity in servers
  • AMD EXPO support simplifies overclock setup on Threadripper 7000
  • 40V operation balances speed and stability

Purpose-built workstation memory

The G.SKILL Zeta R5 Neo kit provides 64 GB of DDR5 RDIMM capacity across four 16 GB modules. It is designed for AMD Ryzen Threadripper 7000 series workstations that require registered ECC memory with quad-channel bandwidth. Builders who need unbuffered DIMMs or consumer-platform compatibility should look elsewhere.

Thermals and power profile

Each module operates at 1.40 V with CL32-39-39 timings at the rated DDR5 6400 speed. On-die ECC and side-band ECC share the same power envelope without additional voltage steps. Dedicated temperature sensors allow the platform to monitor thermal behaviour under sustained load.

Platform integration

The 288-pin RDIMM form factor requires a compatible AMD TRX50 motherboard with four-channel support to run the full kit at rated frequency. AMD EXPO profiles simplify initial configuration for overclocked operation. Systems limited to two-channel architectures or consumer chipsets cannot utilise the registered design.

Highlights

  • 64GB quad-channel capacity for high-density workloads
  • DDR5 6400 speed with CL32 latency for responsive performance
  • ECC Registered design protects data integrity in servers
  • AMD EXPO support simplifies overclock setup on Threadripper 7000
  • 40V operation balances speed and stability

Specifications

BrandG.SKILL
SeriesZeta R5 Neo series
ModelF5-6400R3239G16GQ4-ZR5NK
Capacity64GB (4 x 16GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL32
Timing32-39-39
Voltage1.40V
ECCYes
Buffered/RegisteredRegistered
Multi-channel KitQuad Channel Kit
FeaturesZeta R5 Neo series memory kits are overclocked performance DDR5 R-DIMM memory designed
for use with compatible AMD workstation systems. Featuring AMD EXPO and ECC support, the
Zeta R5 Neo series is the ultimate overclocked performance memory solution for high-end
workstation platforms.
• Overclock performance DDR5 RDIMM memory kit
• Designed for use with AMD Ryzen Threadripper 7000X series processor
• Requires compatible AMD TRX50 motherboard w/ 4-channel support
• On-die ECC & side-band ECC
• Dedicated temperature sensors
• AMD EXPO Support
Shipping weight0.23 kg
Package size244 × 178 × 24 mm

Other versions of this model

4 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules and what step is often missed?

Align the notch on each 288-pin module with the slot key, press firmly until both retention clips click, and enable AMD EXPO in the BIOS to run at DDR5 6400 CL32; the step often missed is enabling EXPO so the kit operates at its rated 6400 speed instead of the default JEDEC frequency.

What maintenance or replacement will the Zeta R5 Neo kit need later?

The modules have on-die ECC and side-band ECC plus dedicated temperature sensors; no routine maintenance is required, and replacement is only needed if a module fails, which would be indicated by corrected ECC errors logged by the system.

What limit appears first under sustained load with the 1.40V DDR5 6400 kit?

At 1.40V the primary limit is thermal — the dedicated temperature sensors let the platform throttle speed if module temperatures exceed safe thresholds during prolonged heavy workloads.

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