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Two green 240-pin DDR2 DIMM sticks without heat spreaders

Computer Memory Solutions

Computer Memory Solutions CM128645300DIMMSR 2GB (2 x 1GB) DDR2 667MHz memory upgrade

SKU CH-BBNT-RS0H9

Two 1 GB DDR2 667 MHz unbuffered non-ECC DIMMs for Dell Dimension E521 desktops

  • Total capacity2 GB (2 × 1 GB)
  • Rated speedDDR2 667 (PC2 5300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL5
  • Memory timings5-5-5
  • Rated voltage1.8 V
  • 2GB dual-channel kit (2 × 1GB) boosts multitasking on Dell Dimension E521
  • DDR2-667 PC2-5300 CL5 timing matches original system spec
  • 240-pin unbuffered non-ECC DIMMs install in any of four slots
  • 8 V major-brand chips validated for Dell Dimension E521 compatibility
  • Lifetime warranty from CMS backs guaranteed fit or money back

Dell Dimension E521 memory kit

This 2 GB kit contains two 1 GB DDR2 modules rated at 667 MHz with CL5 timings. It is built specifically for the Dell Dimension E521 series desktop and uses unbuffered non-ECC DIMMs that install directly into the system's 240-pin slots.

Two-module matched pair

The matched pair enables dual-channel operation on the E521's four memory sockets, doubling memory bandwidth compared with a single stick. No heat spreaders are included, keeping the modules low-profile for tight chassis clearance.

2 GB capacity for legacy desktops

The 2 GB total suits everyday office tasks, web browsing and light multitasking on this platform. The E521 supports a maximum of 4 GB across four sockets, so this kit leaves two slots free for future expansion but cannot exceed the platform's 4 GB ceiling.

How it compares

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

Price $14.99
Cheaper than about 94% of the 21,161 comparable items (median $397.99).
Total capacity 2 GB (2 × 1 GB)
Lower than about 95% of the 20,941 comparable items (median 32 GB).
Price per GB $7.50 per GB
Cheaper than about 54% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM128645300DIMMSR
Total capacity2 GB (2 × 1 GB)
Product type240-Pin DDR2 SDRAM
Performance
Rated speedDDR2 667 (PC2 5300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL5
Memory timings5-5-5
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.8 V
Compatibility
Compatible systemsDell Dimension E521 Series Desktop
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will the 1.8V DDR2 modules need any replacement or maintenance after installation?

The 1.8V DDR2 modules have no moving parts and require no scheduled maintenance or replacement under normal use.

What limit appears first when the CL5 5-5-5 timing runs sustained workloads?

The CL5 5-5-5 timing and 667 MHz bus set the bandwidth ceiling that sustained workloads will reach first.

How much heat and power do the unbuffered non-ECC DIMMs produce when running all day?

The unbuffered non-ECC DIMMs operate at 1.8V without a heat spreader, so heat and power draw stay low during continuous operation.

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