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Four black DDR5 RDIMM modules in a quad-channel kit

G.SKILL

G.SKILL F5-6400R3239G16GQ4-ZR5K 64GB (4×16GB) DDR5 6400 CL32 ECC Registered server RAM

SKU CH-Y07B-RTYXY MPN F5-6400R3239G16GQ4-ZR5K

64 GB quad-channel DDR5 RDIMM kit running at 6400 MT/s with CL32 latency, ECC and registered buffering for Xeon workstations

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL32
  • Memory timings32-39-39
  • Rated voltage1.4 V
  • Buffer typeRegistered

Capacity 64GB (4 x 16GB)

Speed DDR5 6400 (PC5 51200)

  • 64GB total capacity from four 16GB modules
  • DDR5 6400 speed with CL32 latency for responsive performance
  • ECC Registered design protects data integrity in workloads
  • Intel XMP 3.0 support enables simple overclock configuration
  • Optimised for Intel Xeon W-2400X and W790 platforms

Zeta R5 DDR5 6400 quad-channel kit

This 64 GB kit contains four 16 GB DDR5 registered DIMMs rated at 6400 MT/s with CL32-39-39 timings. It is built for workstations that require ECC registered memory and quad-channel bandwidth. The modules operate at 1.40 V and include on-die ECC plus side-band ECC for data integrity.

Intel XMP 3.0 profile and dedicated sensors

The kit ships with an Intel XMP 3.0 profile that sets the rated speed and timings automatically on supported platforms. Dedicated temperature sensors on each module allow the system to monitor thermal conditions during sustained workloads. These features simplify configuration and help maintain stability when the memory is pushed beyond standard JEDEC specifications.

Requires W790 quad-channel motherboard

Full rated performance and ECC registered operation depend on a motherboard with the Intel W790 chipset that provides four memory channels. Without a compatible quad-channel platform the kit will not deliver its specified bandwidth or registered functionality. Builders using other chipsets should select memory validated for those platforms.

How it compares

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

Price $454.99
Pricier than about 69% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $7.11 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

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Specifications

Product
Brand nameG.SKILL
Product lineZeta R5 Series
Model nameF5-6400R3239G16GQ4-ZR5K
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Memory
CAS latencyCL32
Memory timings32-39-39
ECC supportYes
Buffer typeRegistered
Kit configurationQuad Channel Kit
Power
Rated voltage1.4 V
Size & build
Shipping weight0.23 kg
Package size244 × 178 × 24 mm

Other versions of this model

2 more in the same range

Questions about this item

Will the on-die ECC and side-band ECC features require any firmware updates or maintenance on the modules themselves?

No, the on-die ECC and side-band ECC are hardware-based error correction features that operate automatically without any user maintenance or firmware updates to the modules.

What thermal limit appears first during sustained heavy workloads on these 1.40V DDR5 6400 modules?

The dedicated temperature sensors monitor module thermals; sustained loads at 1.40V will hit thermal throttling thresholds before voltage or timing limits become the primary constraint.

How much power and heat does the quad-channel 64GB kit produce when running all day at 6400 speeds?

Four 16GB RDIMMs at 1.40V draw significant power under continuous load; expect noticeable heat output requiring adequate chassis airflow to maintain stable DDR5 6400 operation.

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