Product comparison · 2 internal hard drives

Seagate Constellation SAS 2 TB vs Seagate Momentus 5400.6 320-GB

Key differences

HDD capacity
- Constellation SAS 2 TB:2 TB
- Momentus 5400.6 320-GB:320 GB
HDD speed
- Constellation SAS 2 TB:7200 RPM
- Momentus 5400.6 320-GB:5400 RPM
Interface
- Constellation SAS 2 TB:SAS
- Momentus 5400.6 320-GB:Serial ATA
Component for
- Constellation SAS 2 TB:Server/workstation
- Momentus 5400.6 320-GB:Laptop
Storage drive buffer size
- Constellation SAS 2 TB:16 MB
- Momentus 5400.6 320-GB:8 MB
Read seek time
- Constellation SAS 2 TB:8.5 ms
- Momentus 5400.6 320-GB:14 ms
Average latency
- Constellation SAS 2 TB:4.16 ms
- Momentus 5400.6 320-GB:5.6 ms
Width
- Constellation SAS 2 TB:101.6 mm
- Momentus 5400.6 320-GB:69.8 mm

Differences highlightedShow differences only

Comparison of Constellation SAS 2 TB, Momentus 5400.6 320-GB
15 specifications	A Seagate Constellation SAS 2 TB View product	B Seagate Momentus 5400.6 320-GB View product
Features7 differ
HDD capacityDiffers	2 TB	320 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeKnown for one	3.5"	Unknown — not stated by the source
InterfaceDiffers	SAS	Serial ATA
Component forDiffers	Server/workstation	Laptop
Storage drive buffer sizeDiffers	16 MB	8 MB
Read seek timeDiffers	8.5 ms	14 ms
Write seek timeKnown for one	9.5 ms	Unknown — not stated by the source
Average latencyDiffers	4.16 ms	5.6 ms
Poweridentical
Operating voltageKnown for one	5 / 12 V	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	101.6 mm	69.8 mm
DepthDiffers	147 mm	100.3 mm
HeightDiffers	26.1 mm	9.5 mm
WeightDiffers	710 g	98.8 g
Other featuresidentical
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.