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Product comparison · 2 internal hard drives

Seagate 40GB 2.5" Ultra ATA/100 vs Seagate 500GB 3.5" SATA II

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  • 19specifications compared
  • 15differ
  • 4identical
  • 15known for one product only

Key differences

The Seagate 500GB 3.5" SATA II has 460 GB more HDD capacity than the Seagate 40GB 2.5" Ultra ATA/100 (500 GB vs 40 GB). The Seagate 500GB 3.5" SATA II has 1,800 RPM more HDD speed than the Seagate 40GB 2.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 500GB 3.5" SATA II has 1" more HDD size than the Seagate 40GB 2.5" Ultra ATA/100 (3.5" vs 2.5"). Interface: Ultra-ATA/100 on the Seagate 40GB 2.5" Ultra ATA/100, Serial ATA II on the Seagate 500GB 3.5" SATA II. Component for: Laptop on the Seagate 40GB 2.5" Ultra ATA/100, PC on the Seagate 500GB 3.5" SATA II.

  • HDD capacity
    • 40 GB
    • 500 GB
  • HDD speed
    • 5400 RPM
    • 7200 RPM
  • HDD size
    • 2.5"
    • 3.5"
  • Interface
    • Ultra-ATA/100
    • Serial ATA II
  • Component for
    • Laptop
    • PC
  • Storage drive buffer size
    • 8 MB
    • 16 MB
  • HDD number of heads
    • 2
    • 16
  • Average latency
    • 5.6 ms
    • 4.16 ms

Side by side

Differences highlightedShow differences only
34 specifications
A

Seagate

40GB 2.5" Ultra ATA/100View product
B

Seagate

500GB 3.5" SATA IIView product
Features8 differ
HDD capacityDiffers40 GB500 GB
HDD speedDiffers5400 RPM7200 RPM
HDD sizeDiffers2.5"3.5"
InterfaceDiffersUltra-ATA/100Serial ATA II
TypeHDDHDD
Component forDiffersLaptopPC
Storage drive buffer sizeDiffers8 MB16 MB
HDD number of cylinders1638316383
HDD number of headsDiffers216
Read seek timeKnown for one8.2 ms
Write seek timeKnown for one9 ms
Average latencyDiffers5.6 ms4.16 ms
Bytes per sector512512
Start/stop cyclesKnown for one50000
Access timeKnown for one12.5 ms
Power2 differ
Operating voltageDiffers5 V5 / 12 V
Start-up currentDiffers1 A2.6 A
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
Operational conditions1 differ
Operating temperature (T-T)Differs5 - 55 °C0 - 60 °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
WidthDiffers69.8 mm101.6 mm
DepthDiffers100.2 mm147 mm
HeightDiffers9.5 mm26.1 mm
WeightDiffers100 g710 g
Other featuresidentical
Compatible productsKnown for onePCs

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