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Two green DDR2 fully buffered DIMM sticks in anti-static bag

Computer Memory Solutions

Computer Memory Solutions CM512725300FBDIMM 8GB (2x4GB) DDR2 667 ECC Fully Buffered DIMM memory upgrade

SKU CH-RJPA-K3X9F

8 GB DDR2-667 ECC fully buffered DIMM kit for IBM System x3650 1914 and 7979 servers

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • ECC protection guards server data integrity
  • Fully buffered design supports IBM System x3650 stability
  • 8 GB dual-channel kit expands capacity to 32 GB
  • DDR2 667 MHz CL5 timing matches system spec
  • 240-pin 1.8 V modules install in 8 sockets

System-specific DDR2 upgrade

This 8 GB kit delivers two 4 GB fully buffered DIMMs built for IBM System x3650 1914 and 7979‑xxx servers. Each module runs at DDR2‑667 (PC2‑5300) with CL5 timing and ECC protection for data integrity.

Suits maintainers of listed IBM servers.

The kit is validated only for the specified System x3650 models and will not function in desktops, workstations or servers that require unbuffered or registered DDR2 memory. Buyers needing larger per‑socket capacities or different form factors should look elsewhere.

Fully buffered ECC DDR2‑667 interface

The 240‑pin fully buffered design with ECC and 1.8 V operation is the single specification that determines compatibility; only systems accepting this exact memory type can use the kit.

How it compares

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

Price $34.99
Cheaper than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.37 per GB
Cheaper than about 82% 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 nameComputer Memory Solutions
Model nameCM512725300FBDIMM
Total capacity8 GB (2 × 4 GB)
Product type240-Pin DDR2 SDRAM
Performance
Rated speedDDR2 667 (PC2 5300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL5
Memory timings5-5-5
ECC supportYes
Buffer typeFully Buffered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Compatible systemsIbm System X3650 1914, 7979-Xxx
In the box
Included items2 Memory RAM Sticks

Questions about this item

How much power do the two 4 GB DDR2-667 modules draw when the server runs continuously?

Each stick operates at 1.8 V; total draw depends on the IBM System x3650 1914 memory controller and workload.

What must the server already have for this 240-pin fully buffered kit to function?

The IBM System x3650 1914 or 7979-xxx must provide eight DDR2 FB-DIMM sockets arranged in four banks of two.

Will these CL5 2Rx4 modules work in the same bank as older PC2-5300 sticks I keep?

Yes, they match the DDR2-667 speed and ECC fully buffered specification used across all eight sockets of the 1914 and 7979-xxx platforms.

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