Product comparison · 2 internal hard drives

Seagate 1.5TB SATA HDD vs Seagate 3TB SATA HDD

Key differences

Differences highlightedShow differences only

Comparison of 1.5TB SATA HDD, 3TB SATA HDD
21 specifications	A Seagate 1.5TB SATA HDD View product	B Seagate 3TB SATA HDD View product
Features3 differ
HDD capacityDiffers	1.5 TB	3 TB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA	Serial ATA III
TypeKnown for one	Unknown — not stated by the source	HDD
Storage drive buffer size	64 MB	64 MB
HDD number of headsDiffers	4	6
Bytes per sector	4096	4096
Power2 differ
Power consumption (typical)Differs	6.2 W	8 W
Power consumption (standby)Known for one	Unknown — not stated by the source	0.75 W
Power consumption (idle)Differs	4.6 W	5.8 W
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentKnown for one	Unknown — not stated by the source	2.5 A
Operational conditionsidentical
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Weight & dimensions1 differ
Width	101 mm	101 mm
Depth	147 mm	147 mm
Height	26 mm	26 mm
WeightDiffers	535 g	636 g
Other featuresidentical
Data transfer rate	6 Gbit/s	6 Gbit/s
Internal	Yes	Yes

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.