Product comparison · 2 memory modules

Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 vs Kingston Technology 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4

Key differences

Internal memory
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:4 GB
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:8 GB
Memory layout (modules x size)
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:1 x 4 GB
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:1 x 8 GB
Memory ranking
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:4
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:2
Module configuration
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:512M X 72
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:1024M X 72
Chips organisation
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:X8
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:X4
Internal memory
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:4096 MB
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:8192 MB
Memory layout
- 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8:1 x 4096 MB
- 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4:1 x 8192 MB

Differences highlightedShow differences only

Comparison of 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8, 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4
20 specifications	A Kingston Technology 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Quad Rank, x8 View product	B Kingston Technology 8GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank, x4 View product
Features4 differ
Internal memoryDiffers	4 GB	8 GB
Memory layout (modules x size)Differs	1 x 4 GB	1 x 8 GB
Internal memory type	DDR2	DDR2
Memory form factor	240-pin DIMM	240-pin DIMM
ECC	Yes	Yes
CAS latency	5	5
Memory bus	72 bit	72 bit
Buffered memory type	Registered (buffered)	Registered (buffered)
Memory rankingDiffers	4	2
Memory voltage	1.8 V	1.8 V
Module configurationDiffers	512M X 72	1024M X 72
Memory type	DDR2	DDR2
Lead plating	Gold	Gold
Weight & dimensionsidentical
WidthKnown for one	Unknown — not stated by the source	133.3 mm
Other features3 differ
Chips organisationDiffers	X8	X4
Bus clock rate	667 MHz	667 MHz
Error indication	ECC	ECC
Form factor	240-pin DIMM	240-pin DIMM
Internal memoryDiffers	4096 MB	8192 MB
Memory layoutDiffers	1 x 4096 MB	1 x 8192 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.