PC Components

Crucial BX300 SSD with 480 GB Reviewed: At the Limit of SATA

At the end of August Crucial introduced the third generation of its BX-SSDs. The new BX300 is available with storage capacities of 120, 240 and 480 gigabytes and is designed to eliminate the biggest weakness of its predecessor, the slow write rate. We will clarify whether this succeeds in our test.

According to Crucial, the BX300 should write with about 520 MByte/s and read with 560 MByte/s. Crucial no longer uses cheap TLC flash, but instead relies on high-quality MLC memory. The controller used is a Silicon Motion SM2258 with four memory channels, which accesses eight NAND chips.

The SSD also comes with a mounting spacer so that this thin SSD can also be used in laptops without the SSD flying back and forth. You also get a license for Acronis True Image HD.

Technical Data of the Crucial BX300

Form factor 2.5 inch
available capacities 120 / 240 / 480 GB
Cache 256 / 512 MB DDR3
Controller Silicon Motion SM2258
chip type 3D-MLC-NAND
Read (according to manufacturer) 555 MB/s
Write (according to manufacturer) 510 MB/s
MTTF 1.5 million hours
TBW 55 / 80 / 160 TB
Manufacturer warranty 3 years
Scope of delivery SSD, mounting spacer, Acronis True Image HD

Test System

  • ASRock Z97 Extreme 3 Mainboard
  • Intel Core i7 4770K Processor
  • 16 GB Crucial Ballistix Sport DD3-1600 RAM
  • Windows 10 Pro


AS SSD Benchmark

AS SSD compression benchmark

AS SSD Copy Benchmark

CrystalDisk Benchmark

ATTO Disk Benchmark

HD Tune

Access Times


The third generation of Crucials BX series is clearly convincing. As promised, the write rate is at a permanently high level and both write and read rates scratch the limit of the SATA port. Thanks to the MLC memory used, the BX series no longer plays in the entry-level league, but has risen to the upper league. Exemplary for this is not only the speed and its performance stability, but also the long durability with a TBW of up to 160 TB.

So the Crucial BX300 knows how to convince, but has strong competition. Especially Samsung has made a name for itself and the Samsung SSD 850 Evo is on a similar level. Both technically and in price. As soon as the Crucial BX300 has arrived on the market and the price has dropped by a few Euros, I would prefer it.

Crucial BX300 480 GB

Access Time
Transfer Rate (read)
Transfer Rate (write)
Value for Money

Permanently fast.

The Crucial BX300 is a fast SATA SSD that can convince all along the line. This is ensured by the MLC memory used.

Simon Lüthje

I am co-founder of this blog and am very interested in everything that has to do with technology, but I also like to play games. I was born in Hamburg, but now I live in Bad Segeberg.

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