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Eight bare green DDR5 RDIMM modules in a row

G.SKILL

G.SKILL F5-6400R3239G32GE8-G5N 256GB 8x32GB DDR5 6400 CL32 ECC Registered server RAM

SKU CH-8TMV-V73H5 MPN F5-6400R3239G32GE8-G5N

Eight 32 GB DDR5 registered DIMMs with ECC running at 6400 MT/s and CL32 for AMD Threadripper 7000WX workstations

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetAMD WRX90 Chipset
  • CAS latencyCL32
  • Memory timings32-39-39-102
  • Rated voltage1.4 V
  • 256 GB total capacity across eight 32 GB modules
  • DDR5 6400 speed with CL32 latency for responsive throughput
  • ECC Registered design protects data integrity in critical workloads
  • AMD EXPO profile enables one-click overclock on Threadripper 7000WX
  • Octa-channel kit matches WRX90 eight-channel architecture

Capacity and target platform

This G.SKILL G5 Neo kit provides 256GB of DDR5 server memory across eight 32GB registered DIMMs. It is built for AMD Ryzen Threadripper 7000WX series workstations that require ECC registered modules and an eight-channel memory architecture.

Sustained-load behaviour

Hand-screened ICs and individual module testing target stability during extended rendering or compute workloads. The CL32 32-39-39-102 timings at 1.40V are validated through AMD EXPO profiles to maintain the rated DDR5 6400 data rate under continuous pressure.

DDR5 registered DIMM constraints

Registered signalling and on-die plus side-band ECC add command-cycle overhead that limits maximum frequency compared to unbuffered designs. The 288-pin RDIMM form factor and EXPO profile require a motherboard with AMD WRX90 chipset and physical eight-channel support to operate as specified.

How it compares

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

Price $10,515.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $41.08 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameG.SKILL
Product lineG5 Neo Series
Model nameF5-6400R3239G32GE8-G5N
Total capacity256 GB (8 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetAMD WRX90 Chipset
Memory
CAS latencyCL32
Memory timings32-39-39-102
ECC supportYes
Buffer typeRegistered
Kit configurationOcta Channel Kit
Memory profilesAMD EXPO
Heat spreaderNo
Power
Rated voltage1.4 V
Size & build
Shipping weight0.27 kg
Package size241 × 178 × 25 mm

Questions about this item

How much power will the 1.40V DDR5 6400 kit draw during sustained workloads?

Each module runs at 1.40V with CL32 32-39-39-102 timings; total system power depends on the CPU and motherboard VRM.

What motherboard and CPU must I already have for this octa-channel kit to function?

An AMD WRX90 motherboard with eight DDR5 slots and a Ryzen Threadripper 7000WX processor are required.

Can I mix this 256GB registered ECC kit with other registered ECC DDR5 modules on the same WRX90 board?

Mixing is possible only if all modules share identical speed, timing and voltage; the motherboard QVL should be consulted.

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