TEST: Crucial X9 2TB external SSD

Technical data
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Manufacturer	Crucial
Model number	CT2000X9SSD902
Storage capacity	2048 GB (1863 GiB)
pSLC-Cache	>300 GB approx.
Read speed	1050 MB/s
Write speed	1000 MB/s
Interface	SATA 6 Gbps
Connection	USB Typ C
Size (LxWxH)	64 x 50 x 10 mm
Weight	33 gram
Memory module (NAND)	QLC
Controller	Phison U17
Price	ca. 135 USD (= 0,07 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

50 %

Write speed

49 %

*) Test result evaluated according to AS SSD Score within the same size.

AS SSD Benchmark

Standard performance test

The standard test was performed using a 5 GB file. A total score of 1087 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	942,56 MB/s	950,19 MB/s
4K in megabytes per second	26,66 MB/s	89,38 MB/s
4K-64Thrd in megabytes per second	257,10 MB/s	321,91 MB/s
Access time in milliseconds	0,081 ms	0,204 ms
Score	378	506
Total score	1087

Copy Performance Test

A common everyday situation is simulated here. Three test folders are created:

• ISO (folder with two large files)
• Program (folder with many small files)
• Game (folder with small and large files)

The three folders are copied using the Windows Copy command (the cache remains enabled). The practical test of December 04, 2024 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD Copy-Benchmark	Transfer rate:	Duration:
ISO two large files	637,96 MB/s	3,60 s
Program many small files	131,69 MB/s	53,45 s
Game small and large files	418,05 MB/s	16,52 s

Compression Performance Test

This measures the write and read speed of the external SSD from Crucial, depending on the compressibility of the data (according to the manufacturer, these should be 1050 MB/s and 1000 MB/s respectively).

CrystalDiskMark Benchmark

Here, two sequential and two random performance tests are performed, similar to the ones performed on the AS SSD.

CDM	Read [MB/s]	Write [MB/s]
SEQ1M Q8T1	1051,09	1017,03
SEQ1M Q1T1	826,77	970,33
RND4K Q32T16	295,81	398,91
RND4K Q1T1	38,31	98,60

HD Tune Pro Endurance test

This is a long term test to make full use of the memory capacity. You can see when a cache is full and the writing performance decreases. A test file of 300 GB was written to the medium. The exact cache size could not be determined, because the test file did not exhaust the cache (brought it to the limit). At least the test file could be read with an average write speed of 1006 MB/s and written with 979 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the Crucial external SSD. The transfer data of the read speed is displayed graphically. The minimum, maximum and average values are also determined. The determined access time and burst rate are also displayed.

ATTO Disk Benchmark

Here, a 256 MB file is written several times to the Crucial external SSD. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they were written and read.

SSD-Z Benchmark

Similar to HD Tune, a 500 MB file is written to the Crucial external SSD here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on December 04, 2024.
Information about the test system can be found at the bottom of the home page.
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