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Four bare green DDR5 RDIMM sticks, no heat spreaders

G.SKILL

G.SKILL F5-6400R3239G48GQ4-G5 192GB (4×48GB) DDR5 6400 CL32 ECC Registered server RAM

SKU CH-X4HJ-EJ40M MPN F5-6400R3239G48GQ4-G5

192 GB quad-channel DDR5 RDIMM kit running at 6400 MT/s with CL32 ECC registered stability for Xeon W790 workstations

  • Capacity192GB (4 x 48GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL32
  • Timing32-39-39-102
  • Voltage1.40V
  • 192 GB quad-channel kit scales memory-heavy workloads
  • DDR5 6400 CL32 timing delivers high bandwidth
  • ECC Registered design protects data integrity
  • Intel XMP 3.0 profile simplifies overclock setup
  • 40 V operation balances speed and stability

G5 Series 192GB Quad-Channel Kit

The G.SKILL G5 Series provides 192GB of DDR5 registered memory in a 4×48GB configuration. It is built for Intel Xeon W-2400X workstations that require ECC error correction and quad-channel bandwidth. The modules operate at DDR5 6400 with CL32 timings and need a compatible Intel W790 motherboard.

Thermals and Power at 1.40V

Each RDIMM runs at 1.40V with a dedicated temperature sensor for monitoring. The kit uses hand-screened ICs tested for stability, and the registered buffer reduces electrical load on the memory controller. No heat spreaders are fitted, so chassis airflow must carry heat away from the bare modules.

Sustained Load Behaviour

On-die ECC and side-band ECC protect data integrity during extended rendering or compute sessions. Intel XMP 3.0 profiles apply the rated 32-39-39-102 timings at 6400 MT/s, though final stability depends on the CPU memory controller and motherboard QVL validation. Builders needing non-registered DIMMs or consumer chipset support should look elsewhere.

Highlights

  • 192 GB quad-channel kit scales memory-heavy workloads
  • DDR5 6400 CL32 timing delivers high bandwidth
  • ECC Registered design protects data integrity
  • Intel XMP 3.0 profile simplifies overclock setup
  • 40 V operation balances speed and stability

Specifications

BrandG.SKILL
SeriesG5 Series
ModelF5-6400R3239G48GQ4-G5
Capacity192GB (4 x 48GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL32
Timing32-39-39-102
Voltage1.40V
ECCYes
Buffered/RegisteredRegistered
Multi-channel KitQuad Channel Kit
BIOS/Performance ProfileIntel XMP 3.0
ChipsetIntel W790 Series Chipset (w/ Quad-Channel Memory Support)
Heat SpreaderNo
FeaturesHigh performance DDR5 R-DIMM memory kit
Optimized for Intel Xeon W-2400X series processors
Requires compatible Intel W790 chipset motherboard w/ 4-channel support
On-die ECC & side-band ECC
Dedicated temperature sensors
Intel XMP 3.0 Support
Shipping weight0.27 kg
Package size244 × 178 × 23 mm

Questions about this item

How do I install this 288-pin DDR5 RDIMM kit on an Intel W790 motherboard and what step is often missed?

Seat each 48GB module firmly until the retention clips click into the 288-pin slots, then enable the Intel XMP 3.0 profile in BIOS so the kit runs at DDR5 6400 CL32 instead of the default JEDEC speed.

What maintenance or replacement will this 192GB registered ECC kit need over time?

No routine maintenance is required; the on-die ECC and side-band ECC handle error correction automatically, and the dedicated temperature sensor allows the platform to throttle if needed, so replacement is only necessary if a module fails.

What limit appears first when this 1.40V quad-channel kit runs sustained workloads?

The 1.40V operating voltage combined with no heat spreader means thermal throttling via the dedicated temperature sensor is the first limit reached under prolonged heavy load.

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