Product comparison · 2 internal hard drives

Acer 120GB 2.5" 5400rpm Seagate Merrcury2 ST9120821A (RohS) (option) vs Acer 120GB 2.5" SATA

Key differences

Interface: Ultra-ATA/100 on the Acer 120GB 2.5" 5400rpm Seagate Merrcury2 ST9120821A (RohS) (option), Serial ATA on the Acer 120GB 2.5" SATA.

Interface
- 120GB 2.5" 5400rpm Seagate Merrcury2 ST9120821A (RohS) (option):Ultra-ATA/100
- 120GB 2.5" SATA:Serial ATA

Differences highlightedShow differences only

Comparison of 120GB 2.5" 5400rpm Seagate Merrcury2 ST9120821A (RohS) (option), 120GB 2.5" SATA
19 specifications	A Acer 120GB 2.5" 5400rpm Seagate Merrcury2 ST9120821A (RohS) (option)View product	B Acer 120GB 2.5" SATA View product
Features1 differ
HDD capacity	120 GB	120 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	Ultra-ATA/100	Serial ATA
TypeKnown for one	Unknown — not stated by the source	HDD
Storage drive buffer size	8 MB	8 MB
Average seek time	12.5 ms	12.5 ms
Average latency	5.6 ms	5.6 ms
Poweridentical
Operating voltage	5 V	5 V
Operational conditionsidentical
Operating temperature (T-T)	5 - 55 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating shock	250 G	250 G
Weight & dimensionsidentical
Width	70 mm	70 mm
Depth	100 mm	100 mm
Height	9.5 mm	9.5 mm
Weight	100 g	100 g
Other featuresidentical
Dimensions (WxDxH)	70 x 100 x 9.5 mm	70 x 100 x 9.5 mm
Drive device, transfer rateKnown for one	Unknown — not stated by the source	150 MB/s
Internal	Yes	Yes

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.