Product comparison · 2 memory modules

HyperX 2GB, 1066MHz, DDR2, Non-ECC, CL5 vs HyperX 4GB (2 x 2GB) 667MHz DDR2

Key differences

Internal memory
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:2 GB
- 4GB (2 x 2GB) 667MHz DDR2:4 GB
Memory form factor
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:240-pin DIMM
- 4GB (2 x 2GB) 667MHz DDR2:200-pin SO-DIMM
CAS latency
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:5
- 4GB (2 x 2GB) 667MHz DDR2:4
Memory clock speed
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:1066 MHz
- 4GB (2 x 2GB) 667MHz DDR2:667 MHz
Memory voltage
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:2.2 V
- 4GB (2 x 2GB) 667MHz DDR2:1.8 V
Bus clock rate
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:1066 MHz
- 4GB (2 x 2GB) 667MHz DDR2:667 MHz
Internal memory
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:2048 MB
- 4GB (2 x 2GB) 667MHz DDR2:4096 MB
Memory layout
- 2GB, 1066MHz, DDR2, Non-ECC, CL5:1 x 2048 MB
- 4GB (2 x 2GB) 667MHz DDR2:2 x 2048 MB

Differences highlightedShow differences only

Comparison of 2GB, 1066MHz, DDR2, Non-ECC, CL5, 4GB (2 x 2GB) 667MHz DDR2
25 specifications	A HyperX 2GB, 1066MHz, DDR2, Non-ECC, CL5 View product	B HyperX 4GB (2 x 2GB) 667MHz DDR2 View product
Features5 differ
Internal memoryDiffers	2 GB	4 GB
Memory layout (modules x size)Known for one	Unknown — not stated by the source	2 x 2 GB
Component forKnown for one	Unknown — not stated by the source	Laptop
Memory form factorDiffers	240-pin DIMM	200-pin SO-DIMM
CAS latencyDiffers	5	4
Memory clock speedDiffers	1066 MHz	667 MHz
Memory voltageDiffers	2.2 V	1.8 V
Row cycle timeKnown for one	Unknown — not stated by the source	60 ns
Refresh row cycle timeKnown for one	Unknown — not stated by the source	127.5 ns
Row active timeKnown for one	Unknown — not stated by the source	70000 ns
Memory rankingKnown for one	2	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	0 - 55 °C
Other features3 differ
Bus clock rateDiffers	1066 MHz	667 MHz
Internal memoryDiffers	2048 MB	4096 MB
Memory layoutDiffers	1 x 2048 MB	2 x 2048 MB
Number of pinsKnown for one	Unknown — not stated by the source	200
Memory technologyKnown for one	Unknown — not stated by the source	PC2-5300
Chips organisationKnown for one	X8	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.