Seagate 1 TB, 2.5", 12Gb/s SAS vs Seagate 120GB 3.5" Ultra ATA/100

The short verdict

Scores pending

We haven’t scored these yet. Use the measured differences and full specs below.

1 TB, 2.5", 12Gb/s SAS

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120GB 3.5" Ultra ATA/100

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Choose the 1 TB, 2.5", 12Gb/s SAS if

Lighter in the hand (190 vs 580 g)

Full specs →

120GB 3.5" Ultra ATA/100

Full specs →

At a glance

Key differences

Measured differences only. Ties and tiny gaps are left out.

Why pick the1 TB, 2.5", 12Gb/s SAS1 win

−390 gLighter in the hand190 vs 580 g

Check priceNo store price yet

Why pick the120GB 3.5" Ultra ATA/1000 wins

No measured advantages in our spec data. Check the full specs below.

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Full specs

Side-by-side specifications

Performance1 difference

Storage drive buffer size

128 MB

2 MB

Battery & charging2 differences

Operating voltage

5 V

5 / 12 V

Power consumption (idle)

3.29 W

2.5 W

Design4 differences

Weight

190 g

580 g

Depth

100.5 mm

146.9 mm

Height

15 mm

26 mm

Width

70.1 mm

101.6 mm

General9 differences

Average latency

4.16 ms

Bytes per sector

4096

512

Capacity

1 TB

120 GB

HDD capacity

1 TB

120 GB

HDD size

2.5"

3.5"

Interface

SAS

Ultra-ATA/100

Manufacturer Sku

ST1000NX0323-40PK

ST3120213A

Non-operating shock

400 G

350 G

Operating shock

25 G

63 G

Operating temperature (T-T)

5 - 55 °C

0 - 60 °C

Where to buy

Specs verified against manufacturer data. Prices in USD before tax; we may earn a commission from qualifying purchases.

Community

Which would you buy?

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1 TB, 2.5", 12Gb/s SAS vs 120GB 3.5" Ultra ATA/100

Scores pending

Key differences

Side-by-side specifications

Which would you buy?