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Crucial / Micron

400GB RealSSD P400e Solid State Drive

2.5-inch | SATA 6.0Gb/s
Transform your system's performance.

Enabled by Micron's advanced 25nm MLC NAND Flash, the P400e solid state drive (SSD) provides reliable high performance for read-intensive applications such as boot drives, direct-attached storage, and blade servers. It can also serve as a primary drive in applications that need more endurance and data reliability than a client drive can provide.

Specifically designed for a low total cost of ownership (TCO), the P400e drive features high lifetime endurance, enterprise-level data protection, and a wide selection of capacities. Its excellent dollars-per-IOP performance makes it a competitive replacement for enterprise HDD solutions.

In addition, when you buy a Micron SSD, you're buying from a NAND manufacturer who has direct control over the NAND design, controller firmware, assembly, testing, and supply chain. This vertical integration delivers quality control and design optimization that are unmatched by other SSD competitor.

Micron® Quality
As a brand of Micron, one of the largest NAND manufacturers in the world, Crucial SSDs are designed and developed in-house with the latest technology. This means four things: hundreds of SSD qualification tests, over a thousand hours of prerelease validation testing, 1.5 billion dollars invested in R&D, and more than 30 years of industry expertise.

400GB RealSSD P400e Specifications:


Form Factor
2.5″ SSD
SATA 6Gb/s (SATA 3GB/s compatible)
Formatted Capacity2
25nm Micron MLC NND
SMART Attributes
Self-monitoring, analysis, and reporting technology (SMART) command set
Manufacturer Model Number
RoHS Compliant


Height (max)
7.0mm (0.275″)
Width (max)
69.85mm (2.750″)
Length (max)
100.50mm (3.957″)
Weight (typical)
75g (0.165 lbs.)


MTBF (Mean Time Between Failures)
1,200,000 hours
1 Year OWC Fulfilled Limited Warranty


Sequential Read (up to)
350 MB/sec (SATA 6Gb/s)
Sequential Write (up to)
140 MB/sec (SATA 6Gb/s)
Random 4K Read
50,000 IOPS
Random 4K Write
7,000 IOPS

Environmental (Operating)

1500G / 0.5ms
Temperature (°F)
32°F to 158°F
Temperature (°C)
0°C to 70°C
5-500Hz at 3.1G

Environmental (Non-Operating)

1500G / 1.0ms
Temperature (°F)
-40°F to 185°F
Temperature (°C)
-40°C to 85°C
2-500Hz at 3.1G


Idle (Typical)
0.0 bels
Seek (Typical)
0.0 bels
  1. 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  3. Specific application environments such as temperature and duty cycle will affect the overall reliability rates.

Customer Ratings

Write a Review 5 / 5 4 out of 4 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Waterloo, IA Age: 25-34 Experience Level: Power User Owned Product: 5-6 months
Rating: 5/5 Works well June 16, 2016 Really shouldn't have to worry about SSD's any more. Great price and great company to buy from!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Bowling Green, OH
Rating: 5/5 No problems February 11, 2016 These drives have worked perfectly for me. And the price was right.

I would recommend this item to a friend!

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Montana Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Great value January 14, 2016 This drive, albeit a tad outdated, coupled with the Seagate USB 3 slim portable enclosure, at year-end house cleaning prices, was a steal. Really, a quality 400 GB SSD portable for $115, and literally a few minutes time to put it together? What's not to like.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Botswana Age: 35-44 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Upgrade benefits immediately evident January 14, 2016 For my old laptop, this product has made it work like new again. Looking forward to a few more years of productive use. Start up, shutdows and application launches are that much quicker. So much less heat being generated through to the palm pad, thanks OWC!

I would recommend this item to a friend!