Product comparison · 2 memory modules

Kingston Technology 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2) vs Kingston Technology 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8

Key differences

Memory layout (modules x size)
- 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2):2 x 2 GB
- 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8:2 x 4 GB
CAS latency
- 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2):6
- 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8:5
Buffered memory type
- 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2):Unregistered (unbuffered)
- 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8:Registered (buffered)

Differences highlightedShow differences only

Comparison of 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2), 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8
17 specifications	A Kingston Technology 4GB 800MHz DDR2 ECC CL6 DIMM (Kit of 2)View product	B Kingston Technology 8GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM (Kit of 2) Dual Rank x8 View product
Features3 differ
Internal memoryKnown for one	4 GB	Unknown — not stated by the source
Memory layout (modules x size)Differs	2 x 2 GB	2 x 4 GB
Internal memory type	DDR2	DDR2
Memory form factor	240-pin DIMM	240-pin DIMM
ECC	Yes	Yes
CAS latencyDiffers	6	5
Memory bus	72 bit	72 bit
Buffered memory typeDiffers	Unregistered (unbuffered)	Registered (buffered)
Memory voltage	1.8 V	1.8 V
Module configurationKnown for one	256M X 72	Unknown — not stated by the source
Memory type	DDR2	DDR2
Lead plating	Gold	Gold
Other featuresidentical
Bus clock rateKnown for one	800 MHz	Unknown — not stated by the source
Error indicationKnown for one	ECC	Unknown — not stated by the source
Form factorKnown for one	240-pin DIMM	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

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.