TEST: Corsair EX100U 1TB external SSD

Technical data
Image
Manufacturer	Corsair
Model number	CSSD-EX100U1TB
Storage capacity	1024 GB (932 GiB)
pSLC-Cache	24 GB approx.
Read speed	1600 MB/s
Write speed	1500 MB/s
Interface	USB 3.2 Gen 2x2 (20 Gbit/s)
Connection	USB Typ C
Size (LxWxH)	79.39 x 36.65 x 11 mm
Weight	22 gram
Price	ca. 110 AUD (= 0,11 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

43 %

Write speed

42 %

*) 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 1220 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	1384,57 MB/s	1419,18 MB/s
4K in megabytes per second	25,10 MB/s	92,77 MB/s
4K-64Thrd in megabytes per second	232,54 MB/s	376,78 MB/s
Access time in milliseconds	0,068 ms	0,200 ms
Score	396	611
Total score	1220

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 April 27, 2023 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	885,42 MB/s	2,60 s
Program many small files	164,65 MB/s	42,75 s
Game small and large files	580,22 MB/s	11,91 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 1600MB/s and 1500MB/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	1584,08	1527,31
SEQ1M Q1T1	845,13	1526,68
RND4K Q32T16	316,98	434,39
RND4K Q1T1	38,53	99,78