Product comparison · 2 internal hard drives

Seagate 320GB 3.5" SATA II vs Seagate 750GB 3.5" Ultra ATA/100

Key differences

HDD capacity
- 320GB 3.5" SATA II:320 GB
- 750GB 3.5" Ultra ATA/100:750 GB
Interface
- 320GB 3.5" SATA II:Serial ATA II
- 750GB 3.5" Ultra ATA/100:Ultra-ATA/100
HDD number of heads
- 320GB 3.5" SATA II:4
- 750GB 3.5" Ultra ATA/100:8
Non-operating shock
- 320GB 3.5" SATA II:350 G
- 750GB 3.5" Ultra ATA/100:300 G
Weight
- 320GB 3.5" SATA II:580 g
- 750GB 3.5" Ultra ATA/100:720 g

Differences highlightedShow differences only

Comparison of 320GB 3.5" SATA II, 750GB 3.5" Ultra ATA/100
32 specifications	A Seagate 320GB 3.5" SATA II View product	B Seagate 750GB 3.5" Ultra ATA/100 View product
Features3 differ
HDD capacityDiffers	320 GB	750 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA II	Ultra-ATA/100
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.