Product comparison · 2 internal hard drives

Seagate 40GB 3.5" Ultra ATA/100 vs Seagate 500GB 3.5" SATA II

27specifications compared
9differ
18identical
5known for one product only

Key differences

The Seagate 500GB 3.5" SATA II has 460 GB more HDD capacity than the Seagate 40GB 3.5" Ultra ATA/100 (500 GB vs 40 GB). The Seagate 500GB 3.5" SATA II has 14 MB more storage drive buffer size than the Seagate 40GB 3.5" Ultra ATA/100 (16 MB vs 2 MB). The Seagate 40GB 3.5" Ultra ATA/100 has 2.8 ms more read seek time than the Seagate 500GB 3.5" SATA II (11 ms vs 8.2 ms). Interface: Ultra-ATA/100 on the Seagate 40GB 3.5" Ultra ATA/100, Serial ATA II on the Seagate 500GB 3.5" SATA II.

HDD capacity
- 40GB 3.5" Ultra ATA/100:40 GB
- 500GB 3.5" SATA II:500 GB
Interface
- 40GB 3.5" Ultra ATA/100:Ultra-ATA/100
- 500GB 3.5" SATA II:Serial ATA II
Storage drive buffer size
- 40GB 3.5" Ultra ATA/100:2 MB
- 500GB 3.5" SATA II:16 MB
Read seek time
- 40GB 3.5" Ultra ATA/100:11 ms
- 500GB 3.5" SATA II:8.2 ms
Write seek time
- 40GB 3.5" Ultra ATA/100:12 ms
- 500GB 3.5" SATA II:9 ms
Start-up current
- 40GB 3.5" Ultra ATA/100:2.8 A
- 500GB 3.5" SATA II:2.6 A
Depth
- 40GB 3.5" Ultra ATA/100:146.9 mm
- 500GB 3.5" SATA II:147 mm
Height
- 40GB 3.5" Ultra ATA/100:26 mm
- 500GB 3.5" SATA II:26.1 mm

Side by side

Differences highlightedShow differences only

Comparison of 40GB 3.5" Ultra ATA/100, 500GB 3.5" SATA II
32 specifications	A Seagate 40GB 3.5" Ultra ATA/100 View product	B Seagate 500GB 3.5" SATA II View product
Features5 differ
HDD capacityDiffers	40 GB	500 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Type	HDD	HDD
Storage drive buffer sizeDiffers	2 MB	16 MB
HDD number of cylinders	16383	16383
HDD number of heads	16	16
Read seek timeDiffers	11 ms	8.2 ms
Write seek timeDiffers	12 ms	9 ms
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Component forKnown for one	Unknown — not stated by the source	PC
Power1 differ
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.8 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	350 G	350 G
Weight & dimensions3 differ
Width	101.6 mm	101.6 mm
DepthDiffers	146.9 mm	147 mm
HeightDiffers	26 mm	26.1 mm
WeightDiffers	580 g	710 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)Known for one	2	Unknown — not stated by the source
Drive devices burst data transfer rate (PIO)Known for one	4	Unknown — not stated by the source
Drive devices burst data transfer rate (Ultra DMA)Known for one	5	Unknown — not stated by the source
Compatible productsKnown for one	Unknown — not stated by the source	PCs

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