TEST: Crucial X9 1TB external SSD

Technical data
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Manufacturer	Crucial
Model number	CT1000X9SSD902
Storage capacity	1024 GB (931 GiB)
pSLC-Cache	256 GB approx.
Read speed	1050 MB/s
Write speed	1000 MB/s
Interface	USB 3.2 Gen 2x1 (10 Gbit/s)
Connection	USB Typ C
Size (LxWxH)	64 x 50 x 10 mm
Weight	33 gram
Memory module (NAND)	QLC
Controller	Phison U17
Price	ca. 80 AUD (= 0,08 $ / GB)
Paid link	Buy on Amazon

Compare Product

Compared to the top performer*

Read speed

28 %

Write speed

28 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed with a 5 GB file. A total score of 1057 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	959,73 MB/s	945,94 MB/s
4K in megabytes per second	26,48 MB/s	89,77 MB/s
4K-64Thrd in megabytes per second	237,84 MB/s	319,94 MB/s
Access time in milliseconds	0,065 ms	0,205 ms
Score	360	504
Total score	1057

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	628,08 MB/s	3,66 s
Program many small files	132,76 MB/s	53,02 s
Game small and large files	419,41 MB/s	16,47 s

Compression Performance Test

Here, the writing and reading speed of the SSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 1050MB/s and 1000MB/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	1051,69	1011,20
SEQ1M Q1T1	832,72	964,89
RND4K Q32T16	294,45	379,96
RND4K Q1T1	38,31	98,48