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Product comparison · 2 internal hard drives

Seagate 160GB 3.5" Ultra ATA/100 vs Seagate 40GB 2.5" Ultra ATA/100

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  • 16specifications compared
  • 12differ
  • 4identical
  • 20known for one product only

Key differences

The Seagate 160GB 3.5" Ultra ATA/100 has 120 GB more HDD capacity than the Seagate 40GB 2.5" Ultra ATA/100 (160 GB vs 40 GB). The Seagate 160GB 3.5" Ultra ATA/100 has 1,800 RPM more HDD speed than the Seagate 40GB 2.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 160GB 3.5" Ultra ATA/100 has 1" more HDD size than the Seagate 40GB 2.5" Ultra ATA/100 (3.5" vs 2.5"). Operating voltage: 5 / 12 V on the Seagate 160GB 3.5" Ultra ATA/100, 5 V on the Seagate 40GB 2.5" Ultra ATA/100. Operating temperature (T-T): 0 - 60 °C on the Seagate 160GB 3.5" Ultra ATA/100, 5 - 55 °C on the Seagate 40GB 2.5" Ultra ATA/100.

  • HDD capacity
    • 160 GB
    • 40 GB
  • HDD speed
    • 7200 RPM
    • 5400 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Storage drive buffer size
    • 2 MB
    • 8 MB
  • HDD number of heads
    • 16
    • 2
  • Average latency
    • 4.16 ms
    • 5.6 ms
  • Operating voltage
    • 5 / 12 V
    • 5 V
  • Operating temperature (T-T)
    • 0 - 60 °C
    • 5 - 55 °C

Side by side

Differences highlightedShow differences only
36 specifications
A

Seagate

160GB 3.5" Ultra ATA/100View product
B

Seagate

40GB 2.5" Ultra ATA/100View product
Features6 differ
HDD capacityDiffers160 GB40 GB
HDD speedDiffers7200 RPM5400 RPM
HDD sizeDiffers3.5"2.5"
InterfaceUltra-ATA/100Ultra-ATA/100
TypeHDDHDD
Storage drive buffer sizeDiffers2 MB8 MB
HDD number of cylinders1638316383
HDD number of headsDiffers162
Read seek timeKnown for one11 ms
Write seek timeKnown for one12 ms
Average latencyDiffers4.16 ms5.6 ms
Start/stop cyclesKnown for one50000
Component forKnown for oneLaptop
Access timeKnown for one12.5 ms
Bytes per sectorKnown for one512
Power1 differ
Operating voltageDiffers5 / 12 V5 V
Power consumption (standby)Known for one0.26 W
Power consumption (idle)Known for one0.8 W
Power consumption (read)Known for one1.8 W
Power consumption (write)Known for one1.8 W
Start-up currentKnown for one1 A
Operational conditions1 differ
Operating temperature (T-T)Differs0 - 60 °C5 - 55 °C
Storage temperature (T-T)-40 - 70 °C-40 - 70 °C
Operating relative humidity (H-H)Known for one5 - 90%
Storage relative humidity (H-H)Known for one5 - 95%
Operating altitudeKnown for one-60.96 - 3048 m
Non-operating altitudeKnown for one-60.96 - 12192 m
Operating shockKnown for one63 G
Non-operating shockKnown for one350 G
Weight & dimensions4 differ
WidthDiffers101.6 mm69.8 mm
DepthDiffers146.9 mm100.2 mm
HeightDiffers26 mm9.5 mm
WeightDiffers580 g100 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)Known for one2
Drive devices burst data transfer rate (PIO)Known for one4
Drive devices burst data transfer rate (Ultra DMA)Known for one5

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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