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Product comparison · 2 internal hard drives

Seagate 500GB SATA II HDD, 20Pk vs Seagate Momentus 5400.3 120GB Ultra ATA/100

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  • 14specifications compared
  • 11differ
  • 3identical
  • 21known for one product only

Key differences

The Seagate 500GB SATA II HDD, 20Pk has 380 GB more HDD capacity than the Seagate Momentus 5400.3 120GB Ultra ATA/100 (500 GB vs 120 GB). The Seagate 500GB SATA II HDD, 20Pk has 1,800 RPM more HDD speed than the Seagate Momentus 5400.3 120GB Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 500GB SATA II HDD, 20Pk has 1" more HDD size than the Seagate Momentus 5400.3 120GB Ultra ATA/100 (3.5" vs 2.5"). Interface: Serial ATA II on the Seagate 500GB SATA II HDD, 20Pk, Ultra-ATA/100 on the Seagate Momentus 5400.3 120GB Ultra ATA/100. Component for: Surveillance system on the Seagate 500GB SATA II HDD, 20Pk, Laptop on the Seagate Momentus 5400.3 120GB Ultra ATA/100.

  • HDD capacity
    • 500 GB
    • 120 GB
  • HDD speed
    • 7200 RPM
    • 5400 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Interface
    • Serial ATA II
    • Ultra-ATA/100
  • Component for
    • Surveillance system
    • Laptop
  • Storage drive buffer size
    • 16 MB
    • 8 MB
  • Operating voltage
    • 5 / 12 V
    • 5 V
  • Width
    • 101.6 mm
    • 69.8 mm

Side by side

Differences highlightedShow differences only
35 specifications
A

Seagate

500GB SATA II HDD, 20PkView product
B

Seagate

Momentus 5400.3 120GB Ultra ATA/100View product
Features6 differ
HDD capacityDiffers500 GB120 GB
HDD speedDiffers7200 RPM5400 RPM
HDD sizeDiffers3.5"2.5"
InterfaceDiffersSerial ATA IIUltra-ATA/100
Component forDiffersSurveillance systemLaptop
Storage drive buffer sizeDiffers16 MB8 MB
Read seek timeKnown for one17 ms
Write seek timeKnown for one14 ms
Track to track seek timeKnown for one1 ms
Start/stop cyclesKnown for one50000
HDD number of headsKnown for one3
Access timeKnown for one12.5 ms
Average latencyKnown for one5.6 ms
Power1 differ
Operating voltageDiffers5 / 12 V5 V
Power consumption (standby)Known for one0.2 W
Operational conditionsidentical
Storage temperature (T-T)Known for one-40 - 70 °C
Operating relative humidity (H-H)Known for one5 - 90%
Storage relative humidity (H-H)Known for one5 - 95%
Operating shockKnown for one63 G
Non-operating shockKnown for one300 G
Weight & dimensions4 differ
WidthDiffers101.6 mm69.8 mm
DepthDiffers147 mm100.2 mm
HeightDiffers26.1 mm9.5 mm
WeightDiffers635 g102 g
Other featuresidentical
Power requirementsKnown for one+5V; +12V
Data transfer rateKnown for one3 Gbit/s
Drive ready timeKnown for one9 s
Drive devices burst data transfer rate (PIO)Known for one0-4
Drive devices burst data transfer rate (Ultra DMA)Known for one0-6
HDD transfer rateKnown for one100 Mbit/s
Dimensions (WxDxH)Known for one69.85 x 100.2 x 9.5 mm
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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