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Four bare green DDR5 RDIMM modules in a row

G.SKILL

G.SKILL F5-6400R3239F32GQ4-T5N 128GB (4x32GB) DDR5-6400 CL32 Registered ECC server RAM

SKU CH-8N38-BVHDW MPN F5-6400R3239F32GQ4-T5N

128 GB quad-channel DDR5-6400 registered ECC kit with CL32 timing for Threadripper 7000X on TRX50

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL32
  • Memory timings32-39-39-102
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • 128 GB quad-channel capacity scales multi-threaded workloads
  • DDR5-6400 CL32 delivers high bandwidth at low latency
  • Registered ECC with on-die and side-band protection ensures data integrity
  • 35 V operation reduces power draw under load
  • 16-layer PCB optimises signal integrity for Threadripper 7000X platforms

Purpose-built server memory kit

This 128GB quad-channel kit delivers registered ECC DDR5 for AMD Threadripper 7000X workstations. Four 32GB modules provide the capacity and error correction required for professional workloads. The registered design reduces electrical load on the memory controller.

Registered ECC with AMD EXPO

The modules run at DDR5-6400 with CL32-39-39-102 timings at 1.35V using the AMD EXPO profile. On-die ECC and side-band ECC protect data integrity in critical applications. A 16-layer PCB supports signal quality at this speed. Not for consumer platforms lacking registered DIMM support.

No heat spreader included

The kit ships without heatsinks, relying on chassis airflow for thermal management. Builders must ensure adequate cooling in dense TRX50 configurations. The bare modules fit tight clearance constraints where tall spreaders would interfere. Software control is handled through motherboard BIOS EXPO settings.

How it compares

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

Price $3,842.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $30.02 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameG.SKILL
Product lineT5 Neo Series
Model nameF5-6400R3239F32GQ4-T5N
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Memory
CAS latencyCL32
Memory timings32-39-39-102
ECC supportYes
Buffer typeRegistered
Kit configurationQuad Channel Kit
Memory profilesAMD EXPO
Heat spreaderNo
Power
Rated voltage1.35 V
Size & build
Shipping weight0.12 kg
Package size244 × 178 × 24 mm

Questions about this item

What real-world throughput does the DDR5-6400 rating deliver on a Threadripper 7000X system?

The kit runs at 6400 MT/s, providing up to 51200 MB/s per channel across four channels when the AMD EXPO profile is loaded on a compatible TRX50 motherboard.

How does the registered ECC design affect compatibility with the TRX50 platform?

Registered modules with on-die and side-band ECC are required for the quad-channel TRX50 memory controller; the 288-pin RDIMM form factor and AMD EXPO support ensure correct training at 6400 MT/s.

Will these modules fit in a standard TRX50 server chassis without a heat spreader?

Yes, the bare 16-layer PCB uses the standard 288-pin RDIMM height, so it clears typical DIMM slots and airflow ducts in TRX50 workstations and rackmounts.

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