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Computer Memory Solutions
Computer Memory Solutions CM128645300DIMMSR 2GB (2 x 1GB) DDR2 667MHz memory upgrade
Two 1 GB DDR2 667 MHz unbuffered non-ECC DIMMs for Dell Dimension E521 desktops
- Capacity2GB (2 x 1GB)
- Type240-Pin DDR2 SDRAM
- SpeedDDR2 667 (PC2 5300)
- CAS LatencyCL5
- Timing5-5-5
- Voltage1.8V
- 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.
Highlights
- 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
Specifications
| Brand | Computer Memory Solutions |
|---|---|
| Model | CM128645300DIMMSR |
| Capacity | 2GB (2 x 1GB) |
| Type | 240-Pin DDR2 SDRAM |
| Speed | DDR2 667 (PC2 5300) |
| CAS Latency | CL5 |
| Timing | 5-5-5 |
| Voltage | 1.8V |
| ECC | No |
| Buffered/Registered | Unbuffered |
| Rank | 1Rx8 |
| Chipset | Major Brand Chipset |
| Heat Spreader | No |
| Compatible System | Dell Dimension E521 Series Desktop |
| Package Content | 2 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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