Product comparison · 2 memory modules

Kingston Technology 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8 vs Kingston Technology 1GB 667MHz DDR2 Non-ECC CL5 DIMM

Key differences

Internal memory type
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:DDR
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:DDR2
Memory form factor
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:184-pin DIMM
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:240-pin DIMM
ECC
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:Yes
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:No
CAS latency
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:2.5
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:5
Memory bus
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:72 bit
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:64 bit
Buffered memory type
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:Registered (buffered)
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:Unregistered (unbuffered)
Memory voltage
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:2.5 V
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:1.8 V
Memory type
- 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8:DDR
- 1GB 667MHz DDR2 Non-ECC CL5 DIMM:DDR2

Differences highlightedShow differences only

Comparison of 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8, 1GB 667MHz DDR2 Non-ECC CL5 DIMM
23 specifications	A Kingston Technology 1GB 266MHz DDR ECC Registered CL2.5 DIMM Dual Rank, x8 View product	B Kingston Technology 1GB 667MHz DDR2 Non-ECC CL5 DIMM View product
Features8 differ
Internal memory typeDiffers	DDR	DDR2
Memory form factorDiffers	184-pin DIMM	240-pin DIMM
ECCDiffers	Yes	No
CAS latencyDiffers	2.5	5
Memory busDiffers	72 bit	64 bit
Buffered memory typeDiffers	Registered (buffered)	Unregistered (unbuffered)
Memory voltageDiffers	2.5 V	1.8 V
Module configurationKnown for one	Unknown — not stated by the source	128M X 64
Memory typeDiffers	DDR	DDR2
Weight & dimensions1 differ
WidthDiffers	133 mm	133.3 mm
DepthKnown for one	1.2 mm	Unknown — not stated by the source
HeightKnown for one	32 mm	Unknown — not stated by the source
Other featuresidentical
Bus clock rateKnown for one	Unknown — not stated by the source	667 MHz
Error indicationKnown for one	Unknown — not stated by the source	No
Form factorKnown for one	Unknown — not stated by the source	240-pin DIMM
Internal memoryKnown for one	Unknown — not stated by the source	1024 MB
Memory layoutKnown for one	Unknown — not stated by the source	1 x 1024 MB
Chips organisationKnown for one	X8	Unknown — not stated by the source
Mac compatibilityKnown for one	No	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.