Product comparison · 2 internal hard drives

Seagate 2000GB 3.5 vs Seagate 640GB 2.5

18specifications compared
12differ
6identical
11known for one product only

Key differences

HDD capacity
- 2000GB 3.5:2 TB
- 640GB 2.5:640 GB
HDD speed
- 2000GB 3.5:5900 RPM
- 640GB 2.5:5400 RPM
HDD size
- 2000GB 3.5:3.5"
- 640GB 2.5:2.5"
Storage drive buffer size
- 2000GB 3.5:32 MB
- 640GB 2.5:8 MB
Power consumption (idle)
- 2000GB 3.5:5.5 W
- 640GB 2.5:0.68 W
Operating voltage
- 2000GB 3.5:5 / 12 V
- 640GB 2.5:5 V
Operating shock
- 2000GB 3.5:70 G
- 640GB 2.5:350 G
Non-operating shock
- 2000GB 3.5:300 G
- 640GB 2.5:800 G

Side by side

Differences highlightedShow differences only

Comparison of 2000GB 3.5, 640GB 2.5
29 specifications	A Seagate 2000GB 3.5 View product	B Seagate 640GB 2.5 View product
Features4 differ
HDD capacityDiffers	2 TB	640 GB
HDD speedDiffers	5900 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
Interface	Serial ATA II	Serial ATA II
Type	HDD	HDD
Component forKnown for one	Unknown — not stated by the source	Laptop
Storage drive buffer sizeDiffers	32 MB	8 MB
HDD interface transfer rateKnown for one	Unknown — not stated by the source	3 Gbit/s
Read seek timeKnown for one	Unknown — not stated by the source	11 ms
Average latency	5.5 ms	5.5 ms
Bytes per sector	512	512
Start/stop cyclesKnown for one	50000	Unknown — not stated by the source
Power2 differ
Power consumption (idle)Differs	5.5 W	0.68 W
Operating voltageDiffers	5 / 12 V	5 V
Power consumption (typical)Known for one	6.8 W	Unknown — not stated by the source
Start-up currentKnown for one	2 A	Unknown — not stated by the source
Operational conditions2 differ
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating shockDiffers	70 G	350 G
Non-operating shockDiffers	300 G	800 G
Weight & dimensions4 differ
WidthDiffers	101.8 mm	69.8 mm
DepthDiffers	147 mm	100.3 mm
HeightDiffers	26.1 mm	9.5 mm
WeightDiffers	660 g	100 g
Other featuresidentical
Product colourKnown for one	Unknown — not stated by the source	Black
InternalKnown for one	Unknown — not stated by the source	Yes
Acoustic pressure emissionsKnown for one	Unknown — not stated by the source	26 dB
Sustained data rateKnown for one	95 MB/s	Unknown — not stated by the source
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717050	Unknown — not stated by the source

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.

More internal hard drive comparisons

All internal hard drive comparisons