Product comparison · 2 memory modules

Kingston Technology 1GB 667MHz DDR2 Non-ECC CL5 DIMM vs Kingston Technology 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4

Key differences

Internal memory
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:1 GB
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:2 GB
Memory layout (modules x size)
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:1 x 1 GB
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:1 x 2 GB
ECC
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:No
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:Yes
CAS latency
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:5
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:3
Memory bus
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:64 bit
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:72 bit
Check width
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:8 bit
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:4 bit
Buffered memory type
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:Unregistered (unbuffered)
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:Registered (buffered)
Module configuration
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:128M X 64
- 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4:256M X 72

Differences highlightedShow differences only

Comparison of 1GB 667MHz DDR2 Non-ECC CL5 DIMM, 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4
21 specifications	A Kingston Technology 1GB 667MHz DDR2 Non-ECC CL5 DIMM View product	B Kingston Technology 2GB 400MHz DDR2 ECC Registered CL3 DIMM Single Rank, x4 View product
Features8 differ
Internal memoryDiffers	1 GB	2 GB
Memory layout (modules x size)Differs	1 x 1 GB	1 x 2 GB
ECCDiffers	No	Yes
CAS latencyDiffers	5	3
Memory busDiffers	64 bit	72 bit
Check widthDiffers	8 bit	4 bit
Buffered memory typeDiffers	Unregistered (unbuffered)	Registered (buffered)
Memory rankingKnown for one	Unknown — not stated by the source	1
Module configurationDiffers	128M X 64	256M X 72
Other features4 differ
Chips organisationKnown for one	Unknown — not stated by the source	X4
Bus clock rateDiffers	667 MHz	400 MHz
Error indicationDiffers	No	ECC
Internal memoryDiffers	1024 MB	2048 MB
Memory layoutDiffers	1 x 1024 MB	1 x 2048 MB
Weight & dimensionsidentical
WidthKnown for one	133.3 mm	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.