Product comparison · 2 memory modules

Kingston Technology 2GB DDR2-800 vs Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8

16specifications compared
11differ
5identical
5known for one product only

Key differences

The Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 has 2 GB more internal memory than the Kingston Technology 2GB DDR2-800 (4 GB vs 2 GB). The Kingston Technology 2GB DDR2-800 has 1 more CAS latency than the Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 (6 vs 5). The Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 has 8 bit more memory bus than the Kingston Technology 2GB DDR2-800 (72 bit vs 64 bit). Only the Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 has ECC. Memory layout (modules x size): 1 x 2 GB on the Kingston Technology 2GB DDR2-800, 1 x 4 GB on the Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8.

Internal memory
- 2GB DDR2-800:2 GB
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:4 GB
Memory layout (modules x size)
- 2GB DDR2-800:1 x 2 GB
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:1 x 4 GB
ECC
- 2GB DDR2-800:No
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:Yes
CAS latency
- 2GB DDR2-800:6
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:5
Memory bus
- 2GB DDR2-800:64 bit
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:72 bit
Buffered memory type
- 2GB DDR2-800:Unregistered (unbuffered)
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:Registered (buffered)
Module configuration
- 2GB DDR2-800:256M X 64
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:512M X 72
Bus clock rate
- 2GB DDR2-800:800 MHz
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:667 MHz

Side by side

Differences highlightedShow differences only

Comparison of 2GB DDR2-800, 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8
21 specifications	A Kingston Technology 2GB DDR2-800 View product	B Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 View product
Features7 differ
Internal memoryDiffers	2 GB	4 GB
Memory layout (modules x size)Differs	1 x 2 GB	1 x 4 GB
Internal memory type	DDR2	DDR2
Memory form factor	240-pin DIMM	240-pin DIMM
ECCDiffers	No	Yes
CAS latencyDiffers	6	5
Memory busDiffers	64 bit	72 bit
Buffered memory typeDiffers	Unregistered (unbuffered)	Registered (buffered)
Memory rankingKnown for one	Unknown — not stated by the source	4
Memory voltage	1.8 V	1.8 V
Module configurationDiffers	256M X 64	512M X 72
Memory type	DDR2	DDR2
Lead platingKnown for one	Unknown — not stated by the source	Gold
Component forKnown for one	PC	Unknown — not stated by the source
Other features4 differ
Chips organisationKnown for one	Unknown — not stated by the source	X8
Bus clock rateDiffers	800 MHz	667 MHz
Error indicationDiffers	No	ECC
Form factor	240-pin DIMM	240-pin DIMM
Internal memoryDiffers	2048 MB	4096 MB
Memory layoutDiffers	1 x 2048 MB	1 x 4096 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.

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