Product comparison · 2 internal hard drives

Seagate BARRACUDA 7200.8 400GB vs Seagate K HDFireball 3 20GB ATA133 540020pkbulk

Key differences

HDD capacity
- BARRACUDA 7200.8 400GB:400 GB
- K HDFireball 3 20GB ATA133 540020pkbulk:20 GB
HDD speed
- BARRACUDA 7200.8 400GB:7200 RPM
- K HDFireball 3 20GB ATA133 540020pkbulk:5400 RPM
Interface
- BARRACUDA 7200.8 400GB:Serial ATA
- K HDFireball 3 20GB ATA133 540020pkbulk:Ultra-ATA/133
Storage drive buffer size
- BARRACUDA 7200.8 400GB:8 MB
- K HDFireball 3 20GB ATA133 540020pkbulk:2 MB
Average seek time
- BARRACUDA 7200.8 400GB:8 ms
- K HDFireball 3 20GB ATA133 540020pkbulk:12 ms

Differences highlightedShow differences only

Comparison of BARRACUDA 7200.8 400GB, K HDFireball 3 20GB ATA133 540020pkbulk
12 specifications	A Seagate BARRACUDA 7200.8 400GB View product	B Seagate K HDFireball 3 20GB ATA133 540020pkbulk View product
Features5 differ
HDD capacityDiffers	400 GB	20 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA	Ultra-ATA/133
Storage drive buffer sizeDiffers	8 MB	2 MB
Average seek timeDiffers	8 ms	12 ms
Average latencyKnown for one	Unknown — not stated by the source	5.5 ms
Poweridentical
Operating voltage	5 / 12 V	5 / 12 V
Weight & dimensionsidentical
WeightKnown for one	Unknown — not stated by the source	509 g
Other featuresidentical
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	102 x 147 x 17.5 mm
Internal	Yes	Yes
Special featuresKnown for one	Whisper-quiet acoustics Serial ATA interface with NCQ	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.