Product comparison · 2 memory modules

Kingston Technology 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4 vs Kingston Technology 4GB DDR2 DIMM

Key differences

Internal memory
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:2 GB
- 4GB DDR2 DIMM:4 GB
Memory layout (modules x size)
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:1 x 2 GB
- 4GB DDR2 DIMM:2 x 2 GB
Internal memory
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:2048 MB
- 4GB DDR2 DIMM:4096 MB
Memory layout
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:1 x 2048 MB
- 4GB DDR2 DIMM:2 x 2048 MB

Differences highlightedShow differences only

Comparison of 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4, 4GB DDR2 DIMM
21 specifications	A Kingston Technology 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4 View product	B Kingston Technology 4GB DDR2 DIMM View product
Features2 differ
Internal memoryDiffers	2 GB	4 GB
Memory layout (modules x size)Differs	1 x 2 GB	2 x 2 GB
Internal memory type	DDR2	DDR2
Component forKnown for one	Unknown — not stated by the source	PC/Server
Memory form factor	240-pin DIMM	240-pin DIMM
ECC	Yes	Yes
CAS latency	3	3
Memory bus	72 bit	72 bit
Check width	4 bit	4 bit
Buffered memory type	Registered (buffered)	Registered (buffered)
Memory ranking	1	1
Memory voltage	1.8 V	1.8 V
Module configuration	256M X 72	256M X 72
Memory type	DDR2	DDR2
Lead plating	Gold	Gold
Other features2 differ
Chips organisation	X4	X4
Bus clock rate	400 MHz	400 MHz
Error indication	ECC	ECC
Form factor	240-pin DIMM	240-pin DIMM
Internal memoryDiffers	2048 MB	4096 MB
Memory layoutDiffers	1 x 2048 MB	2 x 2048 MB

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.