Product comparison · 2 internal hard drives

Seagate Constellation .2 internal hard drive vs Seagate Momentus ST9750423AS internal hard drive

Key differences

HDD capacity
- Constellation .2 internal hard drive:1 TB
- Momentus ST9750423AS internal hard drive:750 GB
HDD speed
- Constellation .2 internal hard drive:7200 RPM
- Momentus ST9750423AS internal hard drive:5400 RPM
HDD size
- Constellation .2 internal hard drive:2.5"
- Momentus ST9750423AS internal hard drive:3.5"
Storage drive buffer size
- Constellation .2 internal hard drive:64 MB
- Momentus ST9750423AS internal hard drive:16 MB
Read seek time
- Constellation .2 internal hard drive:8.5 ms
- Momentus ST9750423AS internal hard drive:11 ms
Write seek time
- Constellation .2 internal hard drive:9.5 ms
- Momentus ST9750423AS internal hard drive:13 ms
Average latency
- Constellation .2 internal hard drive:4.16 ms
- Momentus ST9750423AS internal hard drive:5.6 ms
Power consumption (typical)
- Constellation .2 internal hard drive:5.21 W
- Momentus ST9750423AS internal hard drive:1.6 W

Differences highlightedShow differences only

Comparison of Constellation.2, ST9750423AS
27 specifications	A Seagate Constellation .2 internal hard drive Model Constellation.2 View product	B Seagate Momentus ST9750423AS internal hard drive Model ST9750423AS View product
Features7 differ
HDD capacityDiffers	1 TB	750 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	2.5"	3.5"
Component forKnown for one	Unknown — not stated by the source	Laptop
Storage drive buffer sizeDiffers	64 MB	16 MB
Read seek timeDiffers	8.5 ms	11 ms
Write seek timeDiffers	9.5 ms	13 ms
Average latencyDiffers	4.16 ms	5.6 ms
Mean time between failures (MTBF)Known for one	1400000 h	Unknown — not stated by the source
Power4 differ
Power consumption (typical)Differs	5.21 W	1.6 W
Power consumption (idle)Differs	3.21 W	0.55 W
Operating voltageDiffers	5 V	5 / 12 V
Start-up currentDiffers	0.99 A	1 A
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 60 °C	0 - 60 °C
Non-operating shockDiffers	400 G	1000 G
Operating shockKnown for one	70 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	70 mm	69.8 mm
DepthDiffers	100.5 mm	100.3 mm
HeightDiffers	14.8 mm	9.5 mm
WeightDiffers	200 g	115 g
Other features1 differ
Power requirementsKnown for one	Unknown — not stated by the source	5VDC
Data transfer rateDiffers	6 Gbit/s	3 Gbit/s
Plug and PlayKnown 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.