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Four green circuit boards with black chips and gold pins

G.SKILL

G.SKILL F5-6400R3239G32GQ4-G5N 128GB (4×32GB) DDR5 6400 CL32 ECC Registered server RAM

SKU CH-QA93-RGBN8 MPN F5-6400R3239G32GQ4-G5N

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

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetAMD TRX50 Chipset
  • CAS latencyCL32
  • Memory timings32-39-39-102
  • Rated voltage1.4 V
  • 128GB quad-channel kit powers heavy workloads
  • DDR5 6400 speed with CL32 latency boosts throughput
  • ECC Registered design protects data integrity
  • AMD EXPO profile enables one-click overclock on TRX50
  • Hand-screened ICs tested for stability under load

Capacity and architecture

This is a 128GB quad-channel kit of DDR5 RDIMM modules built for AMD TRX50 workstation platforms. Four 32GB registered DIMMs run at 6400 MT/s with CL32 timing and 1.40V operation.

Workstation fit

It suits professionals building Threadripper 7000X systems that require ECC registered memory and AMD EXPO profiles for stability in rendering or simulation workloads. Buyers who need unbuffered memory or support for other processor families should choose a different kit.

Deciding specification

The registered ECC design with AMD EXPO certification on the TRX50 chipset is the single factor that determines compatibility; only motherboards and CPUs validated for this combination will run the kit at its rated 6400 MT/s speed.

How it compares

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

Price $4,469.99
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 $34.92 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 nameF5-6400R3239G32GQ4-G5N
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetAMD TRX50 Chipset
Memory
CAS latencyCL32
Memory timings32-39-39-102
ECC supportYes
Buffer typeRegistered
Kit configurationQuad 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

Should I choose the 128GB quad-channel kit or a smaller capacity for my Threadripper 7000X workstation?

This kit provides 128GB across four 32GB modules, filling all four channels on a TRX50 motherboard for maximum bandwidth and ECC capacity.

What does the DDR5 6400 speed with CL32 timing deliver in an actual AMD workstation build?

The kit runs at 6400 MT/s with 32-39-39-102 timings at 1.40V via AMD EXPO, giving high throughput for rendering and compute workloads on Threadripper 7000X.

How does the 288-pin RDIMM form factor and registered ECC design affect compatibility and stability?

These are 288-pin DDR5 RDIMMs with on-die and side-band ECC, requiring a TRX50 motherboard with quad-channel support for registered memory operation.

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