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Product comparison · 2 internal hard drives

Seagate BARRACUDA 7200.8 400GB vs Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A)

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  • 8specifications compared
  • 6differ
  • 2identical
  • 9known for one product only

Key differences

The Seagate BARRACUDA 7200.8 400GB has 280 GB more HDD capacity than the Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) (400 GB vs 120 GB). The Seagate BARRACUDA 7200.8 400GB has 3,000 RPM more HDD speed than the Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) (7200 RPM vs 4200 RPM). The Seagate BARRACUDA 7200.8 400GB has 1" more HDD size than the Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) (3.5" vs 2.5"). Interface: Serial ATA on the Seagate BARRACUDA 7200.8 400GB, Ultra-ATA/100 on the Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A). Operating voltage: 5 / 12 V on the Seagate BARRACUDA 7200.8 400GB, 5 V on the Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A).

  • HDD capacity
    • 400 GB
    • 120 GB
  • HDD speed
    • 7200 RPM
    • 4200 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Interface
    • Serial ATA
    • Ultra-ATA/100
  • Average seek time
    • 8 ms
    • 12.5 ms
  • Operating voltage
    • 5 / 12 V
    • 5 V

Side by side

Differences highlightedShow differences only
17 specifications
A

Seagate

BARRACUDA 7200.8 400GBView product
B

Seagate

MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A)View product
Features5 differ
HDD capacityDiffers400 GB120 GB
HDD speedDiffers7200 RPM4200 RPM
HDD sizeDiffers3.5"2.5"
InterfaceDiffersSerial ATAUltra-ATA/100
Component forKnown for oneLaptop
Storage drive buffer size8 MB8 MB
Average seek timeDiffers8 ms12.5 ms
Average latencyKnown for one5.56 ms
Bytes per sectorKnown for one512
Power1 differ
Operating voltageDiffers5 / 12 V5 V
Operational conditionsidentical
Operating temperature (T-T)Known for one5 - 55 °C
Weight & dimensionsidentical
WeightKnown for one100 g
Other featuresidentical
Power requirementsKnown for one2 W
Dimensions (WxDxH)Known for one69.85 x 100.2 x 9.5 mm
InternalYesYes
Acoustic pressure emissionsKnown for one24 dB
Special featuresKnown for oneWhisper-quiet acoustics Serial ATA interface with NCQ

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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