Product comparison · 2 internal hard drives

Samsung 640GB SATA II HDD vs Samsung SATA II 1.5TB

Key differences

Differences highlightedShow differences only

Comparison of 640GB SATA II HDD, SATA II 1.5TB
35 specifications	A Samsung 640GB SATA II HDD View product	B Samsung SATA II 1.5TB View product
Features5 differ
HDD capacityDiffers	640 GB	1.5 TB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	2.5"	3.5"
Storage drive buffer sizeDiffers	16 MB	32 MB
Average latencyDiffers	4.17 ms	5.52 ms
Mean time between failures (MTBF)Known for one	1200000 h	Unknown — not stated by the source
TypeKnown for one	Unknown — not stated by the source	HDD
Power1 differ
Operating voltageDiffers	5 V	5 / 12 V
Power consumption (idle)Known for one	Unknown — not stated by the source	5.1 W
Power consumption (read)Known for one	Unknown — not stated by the source	6.3 W
Power consumption (write)Known for one	Unknown — not stated by the source	6.3 W
Weight & dimensions1 differ
WidthKnown for one	101.5 mm	Unknown — not stated by the source
DepthKnown for one	147 mm	Unknown — not stated by the source
HeightKnown for one	26.1 mm	Unknown — not stated by the source
WeightDiffers	610 g	650 g
Other featuresidentical
Drive device, transfer rateKnown for one	175 MB/s	Unknown — not stated by the source
Data transfer rateKnown for one	Unknown — not stated by the source	166 Gbit/s

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.