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Product comparison · 2 internal hard drives

Samsung 320GB Serial ATA II HDD vs Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk

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  • 13specifications compared
  • 10differ
  • 3identical
  • 23known for one product only

Key differences

The Samsung 320GB Serial ATA II HDD has 200 GB more HDD capacity than the Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk (320 GB vs 120 GB). The Samsung 320GB Serial ATA II HDD has 1,800 RPM more HDD speed than the Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk (7200 RPM vs 5400 RPM). The Samsung 320GB Serial ATA II HDD has 1" more HDD size than the Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk (3.5" vs 2.5"). Interface: Serial ATA II on the Samsung 320GB Serial ATA II HDD, Serial ATA on the Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk. Operating voltage: 5 / 12 V on the Samsung 320GB Serial ATA II HDD, 5 V on the Seagate Momentus 5400.3 120GB SATA 5400RPM 25pk.

  • HDD capacity
    • 320 GB
    • 120 GB
  • HDD speed
    • 7200 RPM
    • 5400 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Interface
    • Serial ATA II
    • Serial ATA
  • Storage drive buffer size
    • 16 MB
    • 8 MB
  • Average seek time
    • 8.9 ms
    • 12.5 ms
  • Average latency
    • 4.17 ms
    • 5.6 ms
  • Operating voltage
    • 5 / 12 V
    • 5 V

Side by side

Differences highlightedShow differences only
36 specifications
A

Samsung

320GB Serial ATA II HDDView product
B

Seagate

Momentus 5400.3 120GB SATA 5400RPM 25pkView product
Features7 differ
HDD capacityDiffers320 GB120 GB
HDD speedDiffers7200 RPM5400 RPM
HDD sizeDiffers3.5"2.5"
InterfaceDiffersSerial ATA IISerial ATA
Component forKnown for oneLaptop
Storage drive buffer sizeDiffers16 MB8 MB
Average seek timeDiffers8.9 ms12.5 ms
Average latencyDiffers4.17 ms5.6 ms
Full stroke seek timeKnown for one18 ms
Track to track seek timeKnown for one0.8 ms
Bytes per sectorKnown for one512
Mean time between failures (MTBF)Known for one600000 h
Power1 differ
Power consumption (standby)Known for one0.2 W
Operating voltageDiffers5 / 12 V5 V
Start-up currentKnown for one1 A
Power consumption (typical)Known for one8 W
Operational conditions2 differ
Operating temperature (T-T)0 - 60 °C0 - 60 °C
Storage temperature (T-T)-40 - 70 °C-40 - 70 °C
Operating shockDiffers63 G350 G
Non-operating shockDiffers350 G900 G
Operating relative humidity (H-H)Known for one5 - 90%
Storage relative humidity (H-H)Known for one5 - 95%
Weight & dimensionsidentical
WidthKnown for one69.8 mm
DepthKnown for one100.2 mm
HeightKnown for one9.5 mm
WeightKnown for one102 g
Other featuresidentical
Dimensions (WxDxH)Known for one69.85 x 100.2 x 9.5 mm
Drive device, transfer rateKnown for one150 MB/s
External power adapterKnown for oneNo
InternalYesYes
Mac compatibilityKnown for oneNo
USB poweredKnown for oneNo
HDD transfer rateKnown for one300 Mbit/s
Power requirementsKnown for one+5V; +12V
Drive ready timeKnown for one10 s
Acoustic pressure emissionsKnown for one2.4 dB

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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