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Green 288-pin DDR4 ECC registered DIMM module with black chips, no heat spreader

OWC

OWC 2R9D42R816GB 16GB DDR4 2933 ECC Registered RDIMM memory upgrade

SKU CH-4T82-E9QBH

16 GB DDR4 2933 ECC registered RDIMM for Supermicro X11 server motherboards

  • Total capacity16 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 16GB

  • 16 GB capacity handles heavy workloads
  • DDR4 2933 MHz speed with CL21 latency
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw
  • Compatible with Supermicro X11SPA-TF, X11SPD-F, X11SPG-TF, X11SPH-nCTF, X11SPH-nCTPF

Server-grade DDR4 for Supermicro X11SP series

This 16 GB DDR4 2933 ECC registered DIMM is built for Supermicro motherboards X11SPA-TF, X11SPD-F, X11SPG-TF, X11SPH-nCTF and X11SPH-nCTPF. It targets administrators upgrading or repairing workstations, servers or NAS systems that require registered memory with error correction. Standard desktop boards cannot use this module.

Registered ECC — the single compatibility gate

The module is a 2Rx8 288-pin DDR4 RDIMM with on-die ECC and a register buffer. It will not work in systems that accept only unbuffered non-ECC UDIMMs, and it cannot be mixed with unbuffered memory in the same platform. Buyers must verify their board explicitly supports registered ECC DDR4 before ordering.

16 GB per slot at 2933 MT/s with backward headroom

Each stick delivers 16 GB at PC4-23400 CL21 1.2 V and is rated for 2933 MT/s. The specification also lists backward compatibility at 2133, 2400 and 2666 MT/s, so the module will clock down automatically in slower channels. Total capacity scales with the number of populated slots up to the motherboard limit.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $110.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.94 per GB
Cheaper than about 58% of the 20,941 comparable items (median $8.19 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 nameOWC
Part number2R9D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard X11SPA-TF
Supermicro Motherboard X11SPD-F
Supermicro Motherboard X11SPG-TF
Supermicro Motherboard X11SPH-nCTF
Supermicro Motherboard X11SPH-nCTPF

Other versions of this model

5 more in the same range

Questions about this item

What real-world throughput does DDR4 2933 CL21 deliver in a server board?

The module runs at 2933 MT/s with CL21 timing at 1.2 V, providing the standard JEDEC bandwidth for that speed grade.

How does the registered ECC interface affect memory-channel limits?

Registered ECC DIMMs place a register on each command line, allowing larger capacities per channel than unbuffered modules while adding one clock cycle of latency.

What physical slot and clearance does this 288-pin RDIMM require?

It fits a standard 288-pin DDR4 DIMM socket and has no heat spreader, so it clears low-profile CPU coolers and dense server chassis.

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