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Eight black DDR5 RDIMM modules with silver heat spreaders in a row

Kingston Technology Corp.

Kingston Technology Corp. KF556R36RBK8-128 128GB (8x16GB) DDR5-5600 CL36 RDIMM ECC server RAM

SKU CH-HRPK-W5TH4 MPN KF556R36RBK8-128

Eight 16 GB DDR5 RDIMM modules provide 128 GB ECC capacity at 5600 MHz CL36 with registered signal integrity

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL36
  • Memory timings36-38-38
  • Rated voltage1.25 V
  • Buffer typeRegistered
  • 128 GB capacity handles heavy workloads with eight 16 GB modules
  • DDR5-5600 speed moves data at 5600 MHz for responsive performance
  • CL36 CAS latency with 36-38-38 timings enables quick data access
  • Registered ECC design detects and corrects errors for data integrity
  • 25 V operating voltage runs eight RDIMMs efficiently

Capacity and configuration

This kit delivers 128GB of DDR5 memory across eight 16GB registered DIMMs. It targets workstations and high-end desktops that require large-capacity, error-correcting memory for demanding professional workloads.

Registered DDR5 constraints

Registered DIMMs add a buffer that improves signal integrity at high densities, but they require motherboards with RDIMM support and compatible chipsets. The modules operate at 1.25V with a CL36 latency profile at 5600 MT/s.

Upgrade path from unbuffered ECC

Moving from non-registered ECC or lower-capacity registered kits to this octo-channel configuration enables substantially larger memory footprints for virtualization, simulation and content creation. The jump is worthwhile when the platform supports registered memory and the workload exceeds the capacity or bandwidth of smaller kits.

How it compares

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

Price $4,023.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $31.44 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameKingston
Product lineFury Renegade Pro
Model nameKF556R36RBK8-128
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL36
Memory timings36-38-38
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Kit configurationOcto-Channel
Heat spreaderYes
Power
Rated voltage1.25 V
Size & build
Shipping weight0.18 kg
Package size160 × 100 × 38 mm

Questions about this item

Should I pick the 128GB octo-channel kit or a smaller capacity for my workstation?

The 128GB kit provides eight 16GB modules for full octo-channel bandwidth on supported platforms. Choose it when your workload needs maximum capacity and channel utilisation; smaller kits reduce both.

What does the 5600 MT/s rating deliver in a real system?

At DDR5-5600 the modules transfer data at 5600 million transfers per second, giving up to 44800 MB/s theoretical bandwidth per module when the memory controller runs at that speed.

How does the 288-pin RDIMM interface limit performance?

The 288-pin DDR5 RDIMM interface supports ECC and registered signalling at 1.25 V, capping operation to the JEDEC DDR5 electrical and mechanical specification for registered DIMMs.

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