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Green bare PCB DDR5 DIMM with black memory chips and gold edge contacts

Crucial

Crucial MTC20F2085S1RC48BR 32GB DDR5 4800 CL40 2Rx8 ECC Registered server RAM

SKU CH-B65Q-DHF69 MPN MTC20F2085S1RC48BR

32 GB DDR5-4800 registered ECC server memory module with CL40 latency, 1.10 V operation and dual-rank 2Rx8 organization in a 288-pin DIMM

  • Total capacity32 MB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • 32 GB capacity maximises server memory density
  • DDR5 4800 speed accelerates data throughput
  • ECC registered operation protects data integrity
  • Dual rank 2Rx8 architecture optimises channel efficiency
  • 10 V low voltage reduces power consumption

Server-grade DDR5 for 288-pin DIMM slots

This 32 GB Crucial module runs at DDR5 4800 with CL40 latency and 1.10 V. It carries ECC and registered buffering for error-corrected stability in multi-socket servers and workstations. The dual-rank 2Rx8 organisation helps maximise capacity per channel. No heat spreader is fitted.

Fits registered DDR5 platforms needing ECC

The 288-pin DIMM plugs into server motherboards that support registered DDR5 memory. Registered signalling reduces electrical load on the memory controller, allowing larger populations per channel. ECC corrects single-bit errors to protect data integrity in always-on workloads.

Replaces slower or smaller registered DDR5

Upgrading from lower-speed DDR5 or smaller-capacity registered modules adds bandwidth and density for virtualisation, databases and compute clusters. The jump is worth it when workloads are memory-bound and the platform supports DDR5 4800 registered operation. Not for consumer desktops or unbuffered memory slots.

How it compares

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

Price $500.99
Pricier than about 71% of the 6,523 comparable items (median $188.99).
Total capacity 32 MB
Lower than about 99% of the 6,064 comparable items (median 32 GB).
Price per GB $15,655.94 per GB
Pricier than about 99% 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 nameCrucial
Part numberMTC20F2085S1RC48BR
Total capacity32 MB
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Size & build
Shipping weight0.45 kg
Package size150 × 51 × 13 mm

Questions about this item

Does the 4800 MT/s DDR5 module hit a thermal limit first under sustained server workloads?

The module has no heat spreader and runs at 1.10 V, so sustained heavy loads will be limited by the server chassis airflow rather than an on-board thermal solution.

What is the power draw and noise impact when this 32 GB DIMM runs all day in a 288-pin slot?

At 1.10 V the module draws minimal power and produces no noise of its own; any audible change comes from the system fans responding to overall chassis temperature.

Must the motherboard already support DDR5-4800 ECC Registered 2Rx8 memory for this stick to work?

Yes, the board must accept DDR5 ECC Registered dual-rank modules at 4800 MT/s with a 288-pin DIMM interface.

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