Seagate Constellation ES.3 4 TB vs Seagate IronWolf Pro 125 1.9 TB

A side-by-side spec comparison of the Seagate Constellation ES.3 4 TB and the Seagate IronWolf Pro 125 1.9 TB. We line up every specification, highlight the winner of each, and tally an overall verdict so you can decide which storage is right for your build.

Side-by-side specification comparison of Seagate Constellation ES.3 4 TB and Seagate IronWolf Pro 125 1.9 TB.
Specification	Seagate Constellation ES.3 4 TB $180.00 Winner Buy on Newegg	Seagate IronWolf Pro 125 1.9 TB No price data
Type	HDD	SSD
Cache	128	0
Capacity	4000 GB	1920 GB
Interface	SAS 6.0 Gb/s	SATA
Read Speed	550 MB/s	550 MB/s
Form Factor	3.5"	2.5"
Write Speed	520 MB/s	520 MB/s

Seagate Constellation ES.3 4 TB

specs won

Seagate IronWolf Pro 125 1.9 TB

specs won

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