TEST: HP x911w 256GB USB flash drive

Technical data
Image
Manufacturer	HP
Model number	HPFD911W-256
Storage capacity	256 GB (238 GiB)
Read speed	410 MB/s
Write speed	300 MB/s
Connection	USB Typ A
Price	ca. 68 USD (= 0,27 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

40 %

Write speed

26 %

*) 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 1 GB file. A total score of 186 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	415,92 MB/s	222,73 MB/s
4K in megabytes per second	20,08 MB/s	37,32 MB/s
4K-64Thrd in megabytes per second	12,72 MB/s	14,79 MB/s
Access time in milliseconds	0,401 ms	0,244 ms
Score	74	74
Total score	186

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 September 10, 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	115,44 MB/s	9,30 s
Program many small files	41,57 MB/s	33,85 s
Game small and large files	72,82 MB/s	18,97 s

Compression Performance Test

This measures the write and read speed of the HP USB flash drive, depending on the compressibility of the data (according to the manufacturer, these should be 410 MB/s and 300 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	441,37	269,33
SEQ1M Q1T1	423,56	259,67
RND4K Q32T16	13,84	19,17
RND4K Q1T1	27,28	17,52

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 100 GB was written to the medium.

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 256 GB HP USB flash drive. 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 256 GB HP USB flash drive. 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 256 GB HP USB flash drive here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on September 10, 2023.
Information about the test system can be found at the bottom of the home page.
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