TEST: Netac ZX20L 512GB external SSD

Here you can find a detailed performance and benchmark test of the external SSD ZX20L with 512GB (NETAC-ZX20L-500GB) from Netac.
Score
1402
Price/GB
0,10 €


Technical data
Image ZX20L
Manufacturer Netac
Model number NETAC-ZX20L-500GB
Storage capacity 512 GB (477 GiB)
pSLC-Cache 128 GB approx.
Read speed 2000 MB/s
Write speed 2000 MB/s
Interface USB 3.2 Gen 2x2 (20 Gbit/s)
Connection USB Typ C
Size (LxWxH) 102 x 30 x 9,2 mm
Weight 37 gram
Price ca. 53 USD (= 0,10 $ / GB)
Paid link Buy on Amazon
Compare Product
Compared to the top performer*
Read speed
100 %
Write speed
100 %

*) 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 1402 points was achieved.

AS SSD TEST: Netac ZX20L 512GB

AS SSD Read: Write:
Seq
in megabytes per second
1878,96 MB/s
1542,06 MB/s
4K
in megabytes per second
27,68 MB/s
68,23 MB/s
4K-64Thrd
in megabytes per second
362,99 MB/s
314,53 MB/s
Access time
in milliseconds
0,051 ms
0,516 ms
Score
579
537
Total score
1402

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 November 27, 2024 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: Netac ZX20L 512GB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
746,46 MB/s
3,08 s
Program
many small files
131,32 MB/s
53,60 s
Game
small and large files
429,60 MB/s
16,08 s

Compression Performance Test

This measures the write and read speed of the external SSD from Netac, depending on the compressibility of the data (according to the manufacturer, these should be 2000 MB/s and 2000 MB/s respectively).

AS SSD TEST: Netac ZX20L 512GB

CrystalDiskMark Benchmark

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

CrystalDiskMark Benchmark TEST: Netac ZX20L 512GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
2052,76
1718,64
SEQ1M
Q1T1
1769,89
1525,00
RND4K
Q32T16
307,18
391,33
RND4K
Q1T1
31,58
77,56

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
1.957,70
1.639,00
SEQ1M
Q1T1
1.687,90
1.454,40
RND4K
Q32T16
74.995,40
95.539,10
RND4K
Q1T1
7.710,90
18.935,10

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
4.082,16
4.867,67
SEQ1M
Q1T1
592,25
687,17
RND4K
Q32T16
6.814,86
5.352,00
RND4K
Q1T1
129,53
52,69

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 200 GB was written to the medium. After approx. 128 GB, the pSLC-Cache was full and the performance was throttled.
At least the test file could be read with an average write speed of 832 MB/s and written with 375 MB/s.

HD Tune Endurance Test TEST: Netac ZX20L 512GB

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the Netac 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.

HD Tune TEST: Netac ZX20L 512GB

ATTO Disk Benchmark

Here, a 256 MB file is written several times to the Netac 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.

ATTO Disk Benchmark TEST: Netac ZX20L 512GB

SSD-Z Benchmark

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

SSD-Z TEST: Netac ZX20L 512GB


Information about the test system can be found at the bottom of the home page.
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