Product comparison · 2 internal hard drives

Seagate Barracuda 7200.7 120GB 2Mb (ST3120022A) vs Seagate Barracuda 7200.7 SATA NCQ (ST3120827AS)

Key differences

Interface
- Barracuda 7200.7 120GB 2Mb (ST3120022A):Ultra-ATA/100
- Barracuda 7200.7 SATA NCQ (ST3120827AS):Serial ATA
Storage drive buffer size
- Barracuda 7200.7 120GB 2Mb (ST3120022A):2 MB
- Barracuda 7200.7 SATA NCQ (ST3120827AS):8 MB
Power requirements
- Barracuda 7200.7 120GB 2Mb (ST3120022A):12.5 W
- Barracuda 7200.7 SATA NCQ (ST3120827AS):13 W

Differences highlightedShow differences only

Comparison of Barracuda 7200.7 120GB 2Mb (ST3120022A), Barracuda 7200.7 SATA NCQ (ST3120827AS)
17 specifications	A Seagate Barracuda 7200.7 120GB 2Mb (ST3120022A)View product	B Seagate Barracuda 7200.7 SATA NCQ (ST3120827AS)View product
Features2 differ
HDD capacity	120 GB	120 GB
HDD speed	7200 RPM	7200 RPM
InterfaceDiffers	Ultra-ATA/100	Serial ATA
Storage drive buffer sizeDiffers	2 MB	8 MB
Average seek time	8.5 ms	8.5 ms
Average latency	4.16 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Operational conditionsidentical
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Weight & dimensionsidentical
Weight	635 g	635 g
Other features2 differ
Special featuresDiffers	350 Gs non-op shock 3D Defense System S.M.A.R.T.	S.M.A.R.T.
Power requirementsDiffers	12.5 W	13 W
Dimensions (WxDxH)	101.6 x 146.99 x 26.035 mm	101.6 x 146.99 x 26.035 mm
Internal	Yes	Yes
USB powered	No	No
Sustained data rateKnown for one	58 MB/s	Unknown — not stated by the source
Acoustic pressure emissionsKnown for one	25 dB	Unknown — not stated by the source
HDD transfer rateKnown for one	Unknown — not stated by the source	150 Mbit/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.