Seagate 1.2TB SAS vs Seagate 1 TB 3.5"

The short verdict

Scores pending

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

1.2TB SAS

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1 TB 3.5"

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Choose the 1.2TB SAS if

Lighter in the hand (193 vs 615 g)

Check price at eBay →

Choose the 1 TB 3.5" if

Cheaper today ($49.99 vs $60)

Check price at eBay →

At a glance

Key differences

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

Why pick the1.2TB SAS1 win

−422 gLighter in the hand193 vs 615 g

Check priceBest price · eBay · check the store for today’s priceCheck price at eBay ↗

Why pick the1 TB 3.5"1 win

−$10.01Cheaper today$49.99 vs $60

Check priceBest price · eBay · check the store for today’s priceCheck price at eBay ↗

Full specs

Side-by-side specifications

Performance1 difference

Type

Hybrid-HDD

HDD

Battery & charging1 difference

Operating voltage

5 V

5 / 12 V

Design4 differences

Weight

193 g

615 g

Depth

15 mm

147 mm

Height

100.5 mm

26.1 mm

Width

70.1 mm

101.8 mm

General7 differences

Capacity

1.2 TB

1 TB

HDD capacity

1.2 TB

1 TB

HDD interface transfer rate

12 Gbit/s

6 Gbit/s

HDD size

2.5"

3.5"

HDD speed

10000 RPM

5900 RPM

Interface

SAS

Serial ATA III

Manufacturer Sku

ST1200MM0178

ST31000424CS

Where to buy

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Community

Which would you buy?

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1.2TB SAS vs 1 TB 3.5"

Scores pending

Key differences

Side-by-side specifications

Which would you buy?