Seagate Enterprise Capacity 4 TB vs Seagate ST9640423AS 640 GB

A side-by-side spec comparison of the Seagate Enterprise Capacity 4 TB and the Seagate ST9640423AS 640 GB. 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 Enterprise Capacity 4 TB and Seagate ST9640423AS 640 GB.
Specification	Seagate Enterprise Capacity 4 TB $179.00 Winner Buy on Amazon	No image Seagate ST9640423AS 640 GB No price data
Type	HDD	HDD
Cache	128	16
Capacity	4000 GB	640 GB
Interface	SAS 12.0 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 Enterprise Capacity 4 TB

specs won

Seagate ST9640423AS 640 GB

specs won

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