Product comparison · 2 internal hard drives

Seagate 320GB 3.5" SATA II vs Seagate 750GB 3.5" SATA II

Key differences

Differences highlightedShow differences only

Comparison of 320GB 3.5" SATA II, 750GB 3.5" SATA II
32 specifications	A Seagate 320GB 3.5" SATA II View product	B Seagate 750GB 3.5" SATA II View product
Features2 differ
HDD capacityDiffers	320 GB	750 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
Interface	Serial ATA II	Serial ATA II
Type	HDD	HDD
Storage drive buffer size	16 MB	16 MB
HDD number of headsDiffers	4	8
Track to track seek timeKnown for one	8.5 ms	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Mean time between failures (MTBF)	700000 h	700000 h
Poweridentical
Power consumption (idle)	9.3 W	9.3 W
Power consumption (read)	13 W	13 W
Power consumption (write)	13 W	13 W
Operating voltage	5 / 12 V	5 / 12 V
Start-up current	2.8 A	2.8 A
Operational conditions1 differ
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating altitude	-60.96 - 3048 m	-60.96 - 3048 m
Non-operating altitude	-60.96 - 12192 m	-60.96 - 12192 m
Operating shock	68 G	68 G
Non-operating shockDiffers	350 G	300 G
Weight & dimensions1 differ
Width	101.6 mm	101.6 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	580 g	720 g
Other featuresidentical
Windows operating systems supported	Yes	Yes
Linux operating systems supported	Yes	Yes
Acoustic pressure emissions	2.7 dB	2.7 dB

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.