Product comparison · 2 internal hard drives

Seagate 120GB 2.5" SATA vs Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A)

13specifications compared
10differ
3identical
20known for one product only

Key differences

The Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A) has 180 GB more HDD capacity than the Seagate 120GB 2.5" SATA (300 GB vs 120 GB). The Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A) has 1,800 RPM more HDD speed than the Seagate 120GB 2.5" SATA (7200 RPM vs 5400 RPM). The Seagate 120GB 2.5" SATA has 4.5 ms more average seek time than the Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A) (12.5 ms vs 8 ms). Interface: Serial ATA on the Seagate 120GB 2.5" SATA, Ultra-ATA/100 on the Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A). Operating temperature (T-T): 5 - 55 °C on the Seagate 120GB 2.5" SATA, 0 - 60 °C on the Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A).

HDD capacity
- 120GB 2.5" SATA:120 GB
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):300 GB
HDD speed
- 120GB 2.5" SATA:5400 RPM
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):7200 RPM
Interface
- 120GB 2.5" SATA:Serial ATA
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):Ultra-ATA/100
Average seek time
- 120GB 2.5" SATA:12.5 ms
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):8 ms
Average latency
- 120GB 2.5" SATA:5.6 ms
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):4.16 ms
Operating temperature (T-T)
- 120GB 2.5" SATA:5 - 55 °C
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):0 - 60 °C
Weight
- 120GB 2.5" SATA:100 g
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):635 g
Power requirements
- 120GB 2.5" SATA:2.2 W
- WD Barracuda 7200.8 300GB 8MB (ST3300831A):12.8 W

Side by side

Differences highlightedShow differences only

Comparison of 120GB 2.5" SATA, WD Barracuda 7200.8 300GB 8MB (ST3300831A)
33 specifications	A Seagate 120GB 2.5" SATA View product	B Seagate WD Barracuda 7200.8 300GB 8MB (ST3300831A)View product
Features5 differ
HDD capacityDiffers	120 GB	300 GB
HDD speedDiffers	5400 RPM	7200 RPM
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
InterfaceDiffers	Serial ATA	Ultra-ATA/100
TypeKnown for one	HDD	Unknown — not stated by the source
Component forKnown for one	Laptop	Unknown — not stated by the source
Storage drive buffer size	8 MB	8 MB
HDD number of headsKnown for one	4	Unknown — not stated by the source
Average seek timeDiffers	12.5 ms	8 ms
Average latencyDiffers	5.6 ms	4.16 ms
Bytes per sector	512	512
Start/stop cyclesKnown for one	600000	Unknown — not stated by the source
Poweridentical
Power consumption (standby)Known for one	0.28 W	Unknown — not stated by the source
Power consumption (idle)Known for one	0.8 W	Unknown — not stated by the source
Power consumption (read)Known for one	1.9 W	Unknown — not stated by the source
Power consumption (write)Known for one	2.3 W	Unknown — not stated by the source
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Start-up currentKnown for one	1.1 A	Unknown — not stated by the source
Operational conditions1 differ
Operating temperature (T-T)Differs	5 - 55 °C	0 - 60 °C
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating shockKnown for one	250 G	Unknown — not stated by the source
Non-operating shockKnown for one	900 G	Unknown — not stated by the source
Weight & dimensions1 differ
WidthKnown for one	69.8 mm	Unknown — not stated by the source
DepthKnown for one	100.5 mm	Unknown — not stated by the source
HeightKnown for one	9.5 mm	Unknown — not stated by the source
WeightDiffers	100 g	635 g
Other features3 differ
HDD transfer rateKnown for one	150 Mbit/s	Unknown — not stated by the source
Power requirementsDiffers	2.2 W	12.8 W
Dimensions (WxDxH)Differs	69.85 x 100.2 x 9.5 mm	101.6 x 146.99 x 26.11 mm
Internal	Yes	Yes
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Acoustic pressure emissionsDiffers	24 dB	28 dB
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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