Product comparison · 2 internal hard drives

Seagate 750GB 3.5" SATA II vs Seagate Barracuda 120GB Serial ATA II HDD

14specifications compared
6differ
8identical
22known for one product only

Key differences

The Seagate 750GB 3.5" SATA II has 630 GB more HDD capacity than the Seagate Barracuda 120GB Serial ATA II HDD (750 GB vs 120 GB). The Seagate 750GB 3.5" SATA II has 14 MB more storage drive buffer size than the Seagate Barracuda 120GB Serial ATA II HDD (16 MB vs 2 MB). The Seagate 750GB 3.5" SATA II has 5 G more operating shock than the Seagate Barracuda 120GB Serial ATA II HDD (68 G vs 63 G).

HDD capacity
- 750GB 3.5" SATA II:750 GB
- Barracuda 120GB Serial ATA II HDD:120 GB
Storage drive buffer size
- 750GB 3.5" SATA II:16 MB
- Barracuda 120GB Serial ATA II HDD:2 MB
Operating shock
- 750GB 3.5" SATA II:68 G
- Barracuda 120GB Serial ATA II HDD:63 G
Non-operating shock
- 750GB 3.5" SATA II:300 G
- Barracuda 120GB Serial ATA II HDD:350 G
Height
- 750GB 3.5" SATA II:26.1 mm
- Barracuda 120GB Serial ATA II HDD:20 mm
Weight
- 750GB 3.5" SATA II:720 g
- Barracuda 120GB Serial ATA II HDD:380 g

Side by side

Differences highlightedShow differences only

Comparison of 750GB 3.5" SATA II, Barracuda 120GB Serial ATA II HDD
36 specifications	A Seagate 750GB 3.5" SATA II View product	B Seagate Barracuda 120GB Serial ATA II HDD View product
Features2 differ
HDD capacityDiffers	750 GB	120 GB
HDD speed	7200 RPM	7200 RPM
HDD sizeKnown for one	3.5"	Unknown — not stated by the source
Interface	Serial ATA II	Serial ATA II
TypeKnown for one	HDD	Unknown — not stated by the source
Storage drive buffer sizeDiffers	16 MB	2 MB
HDD number of headsKnown for one	8	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cyclesKnown for one	50000	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	700000 h	Unknown — not stated by the source
Poweridentical
Power consumption (idle)Known for one	9.3 W	Unknown — not stated by the source
Power consumption (read)Known for one	13 W	Unknown — not stated by the source
Power consumption (write)Known for one	13 W	Unknown — not stated by the source
Operating voltageKnown for one	5 / 12 V	Unknown — not stated by the source
Start-up currentKnown for one	2.8 A	Unknown — not stated by the source
Power consumption (standby)Known for one	Unknown — not stated by the source	1.5 W
Operational conditions2 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)Known for one	5 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating altitudeKnown for one	-60.96 - 3048 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-60.96 - 12192 m	Unknown — not stated by the source
Operating shockDiffers	68 G	63 G
Non-operating shockDiffers	300 G	350 G
Weight & dimensions2 differ
Width	101.6 mm	101.6 mm
Depth	147 mm	147 mm
HeightDiffers	26.1 mm	20 mm
WeightDiffers	720 g	380 g
Other featuresidentical
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Linux operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Acoustic pressure emissionsKnown for one	2.7 dB	Unknown — not stated by the source
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	101.6 x 146.99 x 19.99 mm
External power adapterKnown for one	Unknown — not stated by the source	No
InternalKnown for one	Unknown — not stated by the source	Yes
USB poweredKnown for one	Unknown — not stated by the source	No

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.

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