Product comparison · 2 internal hard drives

Seagate 300GB 3.5" SATA II vs Seagate 400GB 3.5" SATA II

27specifications compared
3differ
24identical
2known for one product only

Key differences

The Seagate 400GB 3.5" SATA II has 100 GB more HDD capacity than the Seagate 300GB 3.5" SATA II (400 GB vs 300 GB). The Seagate 400GB 3.5" SATA II has 0.2 ms more read seek time than the Seagate 300GB 3.5" SATA II (8.2 ms vs 8 ms). The Seagate 400GB 3.5" SATA II has 55 g more weight than the Seagate 300GB 3.5" SATA II (710 g vs 655 g).

HDD capacity
- 300GB 3.5" SATA II:300 GB
- 400GB 3.5" SATA II:400 GB
Read seek time
- 300GB 3.5" SATA II:8 ms
- 400GB 3.5" SATA II:8.2 ms
Weight
- 300GB 3.5" SATA II:655 g
- 400GB 3.5" SATA II:710 g

Side by side

Differences highlightedShow differences only

Comparison of 300GB 3.5" SATA II, 400GB 3.5" SATA II
29 specifications	A Seagate 300GB 3.5" SATA II View product	B Seagate 400GB 3.5" SATA II View product
Features2 differ
HDD capacityDiffers	300 GB	400 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
Interface	Serial ATA II	Serial ATA II
Type	HDD	HDD
Component forKnown for one	PC	Unknown — not stated by the source
Storage drive buffer size	16 MB	16 MB
HDD number of cylinders	16383	16383
HDD number of heads	16	16
Read seek timeDiffers	8 ms	8.2 ms
Write seek time	9 ms	9 ms
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Poweridentical
Operating voltage	5 / 12 V	5 / 12 V
Start-up current	2.6 A	2.6 A
Operational conditionsidentical
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating altitude	-60.96 - 3048 m	-60.96 - 3048 m
Non-operating altitude	-60.96 - 12192 m	-60.96 - 12192 m
Operating shock	63 G	63 G
Non-operating shock	300 G	300 G
Weight & dimensions1 differ
Width	101.6 mm	101.6 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	655 g	710 g
Other featuresidentical
Compatible productsKnown for one	PCs	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.

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