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Product comparison · 2 internal hard drives

Samsung 320GB Serial ATA II HDD vs Seagate Momentus 5400.3 120GB Ultra ATA/100

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  • 11specifications compared
  • 8differ
  • 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 Ultra ATA/100 (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 Ultra ATA/100 (7200 RPM vs 5400 RPM). The Samsung 320GB Serial ATA II HDD 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 Samsung 320GB Serial ATA II HDD, Ultra-ATA/100 on the Seagate Momentus 5400.3 120GB Ultra ATA/100. Operating voltage: 5 / 12 V on the Samsung 320GB Serial ATA II HDD, 5 V on the Seagate Momentus 5400.3 120GB Ultra ATA/100.

  • HDD capacity
    • 320 GB
    • 120 GB
  • HDD speed
    • 7200 RPM
    • 5400 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Interface
    • Serial ATA II
    • Ultra-ATA/100
  • Storage drive buffer size
    • 16 MB
    • 8 MB
  • Average latency
    • 4.17 ms
    • 5.6 ms
  • Operating voltage
    • 5 / 12 V
    • 5 V
  • HDD transfer rate
    • 300 Mbit/s
    • 100 Mbit/s

Side by side

Differences highlightedShow differences only
34 specifications
A

Samsung

320GB Serial ATA II HDDView product
B

Seagate

Momentus 5400.3 120GB Ultra ATA/100View product
Features6 differ
HDD capacityDiffers320 GB120 GB
HDD speedDiffers7200 RPM5400 RPM
HDD sizeDiffers3.5"2.5"
InterfaceDiffersSerial ATA IIUltra-ATA/100
Storage drive buffer sizeDiffers16 MB8 MB
Full stroke seek timeKnown for one18 ms
Track to track seek timeKnown for one0.8 ms
Average seek timeKnown for one8.9 ms
Average latencyDiffers4.17 ms5.6 ms
Bytes per sector512512
Mean time between failures (MTBF)Known for one600000 h
Component forKnown for oneLaptop
HDD number of headsKnown for one3
Access timeKnown for one12.5 ms
Power1 differ
Power consumption (typical)Known for one8 W
Operating voltageDiffers5 / 12 V5 V
Power consumption (standby)Known for one0.2 W
Operational conditionsidentical
Operating temperature (T-T)0 - 60 °C0 - 60 °C
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 one350 G
Other features1 differ
HDD transfer rateDiffers300 Mbit/s100 Mbit/s
Power requirementsKnown for one+5V; +12V
Drive ready timeKnown for one10 s
InternalYesYes
Acoustic pressure emissionsKnown for one2.4 dB
Dimensions (WxDxH)Known for one69.85 x 100.2 x 9.5 mm
Sustained data rateKnown for one44 MB/s
Weight & dimensionsidentical
WidthKnown for one69.8 mm
DepthKnown for one100.2 mm
HeightKnown for one9.5 mm
WeightKnown for one102 g

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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