Product comparison · 2 memory modules

HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC vs Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4

11specifications compared
6differ
5identical
8known for one product only

Key differences

The HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC has 2 GB more internal memory than the Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4 (4 GB vs 2 GB). The Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4 has 8 bit more memory bus than the HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC (72 bit vs 64 bit). The HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC has 0.2 V more memory voltage than the Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4 (2.0 V vs 1.8 V). Buffered memory type: Unregistered (unbuffered) on the HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC, Registered (buffered) on the Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4. Module configuration: 256M X 64 on the HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC, 256M X 72 on the Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4.

Internal memory
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:4 GB
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:2 GB
Memory bus
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:64 bit
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:72 bit
Buffered memory type
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:Unregistered (unbuffered)
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:Registered (buffered)
Memory voltage
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:2.0 V
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:1.8 V
Module configuration
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:256M X 64
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:256M X 72
Bus clock rate
- 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC:800 MHz
- 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4:667 MHz

Side by side

Differences highlightedShow differences only

Comparison of 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC, 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4
19 specifications	A HyperX 4GB(2 x 2GB), PC2-6400, DDR2, DIMM 240-pin, 256M X 64, Non-ECC View product	B Kingston Technology 2GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Single Rank, x4 View product
Features5 differ
Internal memoryDiffers	4 GB	2 GB
Internal memory type	DDR2	DDR2
Memory form factor	240-pin DIMM	240-pin DIMM
ECC	No	No
CAS latency	5	5
Memory clock speedKnown for one	800 MHz	Unknown — not stated by the source
Memory busDiffers	64 bit	72 bit
Buffered memory typeDiffers	Unregistered (unbuffered)	Registered (buffered)
Memory voltageDiffers	2.0 V	1.8 V
Module configurationDiffers	256M X 64	256M X 72
Lead plating	Gold	Gold
Memory layout (modules x size)Known for one	Unknown — not stated by the source	1 x 2 GB
Memory typeKnown for one	Unknown — not stated by the source	DDR2
Other features1 differ
Bus clock rateDiffers	800 MHz	667 MHz
Error indicationKnown for one	No	Unknown — not stated by the source
Internal memoryKnown for one	4096 MB	Unknown — not stated by the source
Memory layoutKnown for one	2 x 2048 MB	Unknown — not stated by the source
Chips organisationKnown for one	Unknown — not stated by the source	X4
Form factorKnown for one	Unknown — not stated by the source	240-pin DIMM

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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