Product comparison · 2 memory modules

Kingston Technology 256MB DDR2 vs Kingston Technology 4 GB(2 x 2GB), DIMM 240-pin, DDR II, 533 MHz, CL4, 1.8 V, 256M X 72, ECC

Key differences

Internal memory
- 256MB DDR2:0.25 GB
- 4 GB(2 x 2GB), DIMM 240-pin, DDR II, 533 MHz, CL4, 1.8 V, 256M X 72, ECC:4 GB
Memory form factor
- 256MB DDR2:144-pin SO-DIMM
- 4 GB(2 x 2GB), DIMM 240-pin, DDR II, 533 MHz, CL4, 1.8 V, 256M X 72, ECC:240-pin DIMM

Differences highlightedShow differences only

Comparison of 256MB DDR2, 4 GB(2 x 2GB), DIMM 240-pin, DDR II, 533 MHz, CL4, 1.8 V, 256M X 72, ECC
18 specifications	A Kingston Technology 256MB DDR2 View product	B Kingston Technology 4 GB(2 x 2GB), DIMM 240-pin, DDR II, 533 MHz, CL4, 1.8 V, 256M X 72, ECC View product
Features2 differ
Internal memoryDiffers	0.25 GB	4 GB
Memory layout (modules x size)Known for one	1 x 0.25 GB	Unknown — not stated by the source
Internal memory type	DDR2	DDR2
Memory form factorDiffers	144-pin SO-DIMM	240-pin DIMM
Memory busKnown for one	16 bit	Unknown — not stated by the source
Buffered memory typeKnown for one	Unregistered (unbuffered)	Unknown — not stated by the source
Memory voltage	1.8 V	1.8 V
Module configurationKnown for one	128M X 16	Unknown — not stated by the source
Memory typeKnown for one	DDR2	Unknown — not stated by the source
Lead plating	Gold	Gold
ECCKnown for one	Unknown — not stated by the source	Yes
CAS latencyKnown for one	Unknown — not stated by the source	4
Other featuresidentical
CompatibilityKnown for one	CB423-67951 (HP); CB423A (HP)	Unknown — not stated by the source
Bus clock rateKnown for one	533 MHz	Unknown — not stated by the source
Error indicationKnown for one	No	Unknown — not stated by the source
Form factorKnown for one	144-pin SODIMM	Unknown — not stated by the source
Internal memoryKnown for one	256 MB	Unknown — not stated by the source
Memory layoutKnown for one	1 x 256 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.