Kingston

Kingston A400

Consumercarts is reader-supported. Learn more

Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: Kingston Last updated: September 11, 2026

Report an error

Kingston A400 Review

The Kingston A400 has long served as one of the most basic, lowest-cost SATA SSD upgrades on the market, aimed squarely at buyers replacing an aging mechanical hard drive with the simplest possible solid-state upgrade.

At up to 500 MB/s read and 450 MB/s write, this drive delivers a dramatic real-world improvement over any mechanical hard drive for boot times and application loading, even though its numbers sit at the modest end of the SATA SSD category. Against the Kingston KC600, covered elsewhere on this site, that drive adds hardware encryption and more consistent sustained performance at a higher price. Against the SanDisk SSD Plus, also covered elsewhere on this site, both target the most price-sensitive SATA upgrade buyers.

Performance and Speed

Comparison to Alternatives

Against the Kingston KC600, covered elsewhere on this site, that drive adds hardware encryption and more consistent sustained performance at a higher price. Against the SanDisk SSD Plus, also covered elsewhere on this site, both target the most price-sensitive SATA upgrade buyers.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

Buyers replacing an old mechanical hard drive who want the lowest-cost SATA SSD upgrade available. This drive delivers a dramatic real-world speed improvement at minimal cost.

Not for

Not for buyers who want hardware encryption or top-tier SATA sustained performance. The Kingston KC600, covered elsewhere on this site, is the appropriate step up for those needs.

Specifications

What these specs mean

Identity

Brand	Kingston
Model Number	A400
Series	A400

Interface and form

Drive Type	Internal
Bus Interface	SATA III
Protocol	AHCI
Form Factor	2.5-inch

Sequential performance

Sequential Read	500 MB/s
Sequential Write	450 MB/s

Controller and cache

DRAM Cache	DRAM-less

Endurance and reliability

MTBF	2000000 hours

Physical and commercial

Length	100.0 mm
Width	69.9 mm
Thickness	7.0 mm
Warranty	3 Years

FAQs

What are the key specifications of the Kingston A400 (SATA III/500 MB/s Read/450 MB/s Write/Entry-Level Budget SATA)?

Key specs for the Kingston A400: Sequential Read 500 MB/s, Sequential Write 450 MB/s, Bus Interface SATA III, DRAM Cache DRAM-less, Form Factor 2.5-inch, Drive Type Internal.

Who is the Kingston A400 (SATA III/500 MB/s Read/450 MB/s Write/Entry-Level Budget SATA) best suited to?

Best suited to: Buyers replacing an old mechanical hard drive who want the lowest-cost SATA SSD upgrade available. This drive delivers a dramatic real-world speed improvement at minimal cost.

What are the drawbacks of the Kingston A400 (SATA III/500 MB/s Read/450 MB/s Write/Entry-Level Budget SATA)?

Not the best fit for: Not for buyers who want hardware encryption or top-tier SATA sustained performance. The Kingston KC600, covered elsewhere on this site, is the appropriate step up for those needs.