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Product comparison · 2 internal hard drives

Seagate 160GB 2.5" Ultra ATA/100 vs Seagate 400GB 3.5" Ultra ATA/100

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  • 24specifications compared
  • 15differ
  • 9identical
  • 9known for one product only

Key differences

The Seagate 400GB 3.5" Ultra ATA/100 has 240 GB more HDD capacity than the Seagate 160GB 2.5" Ultra ATA/100 (400 GB vs 160 GB). The Seagate 400GB 3.5" Ultra ATA/100 has 1,800 RPM more HDD speed than the Seagate 160GB 2.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 400GB 3.5" Ultra ATA/100 has 1" more HDD size than the Seagate 160GB 2.5" Ultra ATA/100 (3.5" vs 2.5"). Operating voltage: 5 V on the Seagate 160GB 2.5" Ultra ATA/100, 5 / 12 V on the Seagate 400GB 3.5" Ultra ATA/100.

  • HDD capacity
    • 160 GB
    • 400 GB
  • HDD speed
    • 5400 RPM
    • 7200 RPM
  • HDD size
    • 2.5"
    • 3.5"
  • Storage drive buffer size
    • 8 MB
    • 16 MB
  • HDD number of heads
    • 4
    • 16
  • Read seek time
    • 12.5 ms
    • 11 ms
  • Write seek time
    • 13 ms
    • 12 ms
  • Average latency
    • 5.6 ms
    • 4.16 ms

Side by side

Differences highlightedShow differences only
33 specifications
A

Seagate

160GB 2.5" Ultra ATA/100View product
B

Seagate

400GB 3.5" Ultra ATA/100View product
Features8 differ
HDD capacityDiffers160 GB400 GB
HDD speedDiffers5400 RPM7200 RPM
HDD sizeDiffers2.5"3.5"
Component forKnown for oneLaptop
Storage drive buffer sizeDiffers8 MB16 MB
HDD number of headsDiffers416
Read seek timeDiffers12.5 ms11 ms
Write seek timeDiffers13 ms12 ms
Average latencyDiffers5.6 ms4.16 ms
HDD number of cylindersKnown for one16383
Start/stop cyclesKnown for one50000
Power1 differ
Power consumption (standby)Known for one0.2 W
Power consumption (idle)Known for one0.8 W
Power consumption (read)Known for one2 W
Power consumption (write)Known for one1.8 W
Operating voltageDiffers5 V5 / 12 V
Start-up currentKnown for one1 A
Operational conditions2 differ
Operating shockDiffers350 G63 G
Non-operating shockDiffers900 G300 G
Weight & dimensions4 differ
WidthDiffers69.8 mm101.6 mm
DepthDiffers100.2 mm147 mm
HeightDiffers9.5 mm26.1 mm
WeightDiffers102 g710 g
Other featuresidentical
Sustained data rateKnown for one44 MB/s

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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