Average Bench: 20.9% - 184th / 613

Based on 1,128 user benchmarks.  Device: VID 0781 PID 5583 Model: SanDisk Ultra Fit

The 16GB SanDisk Ultra Fit USB 3.0 is a remarkable flash drive. As well as packing a tiny form factor, the Ultra fit also boasts an impressive peak performance profile with maximum sequential read/writes of 129/46 MBps and 4K read/writes of 6.08/1.51 MBps. The Ultra Fit is actually only bested by three other 16GB models (Sandisk Extreme, Lexar P10, Lexar Triton) all of which cost between from 60-230% more. In terms of outright performance there are better alternatives but in terms of value for money the Ultra Fit is hard to beat. The superbly low price coupled with an amazing form factor which is barely larger than a USB socket make it easy to recommend the 16GB Ultra fit as the best small form factor flash drive on the market. The only thing to watch with the Ultra Fit are its sustained speeds which are significantly lower than peak. [Oct '14 USBFlashPro]


Very poor average bench

The SanDisk Ultra Fit USB 3.0 16GB averaged 79.1% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K Random Write Speed 1.24MB/s
Avg. 4K Random Mixed IO Speed 0.78MB/s
See where your USB ranks →

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Fit USB 3.0 16GB is 23.5%. This is a relatively narrow range which indicates that the SanDisk Ultra Fit USB 3.0 16GB performs reasonably consistently under varying real world conditions.


Avg. Sequential Write Speed 19.4MB/s
Avg. Sequential Mixed IO Speed 24.8MB/s

Average Bench

(Based on 1,128 samples)
Min Avg Max
25.6 Read 80.7 129
7.34 Write 19.4 43.8
9.48 Mixed 24.8 53.8
41.4% 41.6 MB/s
Min Avg Max
3.3 4K Read 4.83 6.08
0.79 4K Write 1.24 1.5
0.48 4K Mixed 0.78 0.94
86.4% 2.28 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
14GB free, PID 5583
Operating at USB 3.0 Speed
Read 123
Write 20.4
Mixed 30.5
54% 57.9 MB/s
4K Read 6.19
4K Write 1.43
4K Mixed 0.78
98% 2.8 MB/s
13GB free, PID 5583
Operating at USB 3.0 Speed
Read 122
Write 22.1
Mixed 25.2
52% 56.6 MB/s
4K Read 6.21
4K Write 1.19
4K Mixed 0.03
65% 2.48 MB/s
14GB free, PID 5583
Operating at USB 3.0 Speed
Read 122
Write 22
Mixed 32.6
56% 58.9 MB/s
4K Read 5.39
4K Write 1.2
4K Mixed 0.7
85% 2.43 MB/s
2GB free, PID 5583
Operating at USB 3.0 Speed
Read 120
Write 17.7
Mixed 12.2
42% 49.8 MB/s
4K Read 4.74
4K Write 0.9
4K Mixed 0.67
71% 2.1 MB/s
14GB free, PID 5583
Operating at USB 2.1 Speed
Read 32.2
Write 5.93
Mixed 14.7
18% 17.6 MB/s
4K Read 4.96
4K Write 1.12
4K Mixed 0.79
84% 2.29 MB/s


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Typical Ultra Fit USB 3.0 16GB Builds (Compare 10,808 builds) See popular component choices, score breakdowns and rankings.
Gaming 109%
Desktop 92%
Nuclear submarine
Workstation 72%

Motherboard: Asus Z170 PRO GAMING - $153

EDIT WITH CUSTOM PC BUILDER Value: 102% - Outstanding Total price: $1,062

Popular Ultra Fit USB 3.0 16GB compatible motherboards:

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Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
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  • - Reports are generated and presented on userbenchmark.com.
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USB Flash Drive Rankings (Price vs Performance) February 2017 USB Rankings.

We highlight the best USB flash drive in terms of balanced performance and value for money using price, sequential read, sequential write , 4k read and 4k write speed. The speeds are combined to form a single effective speed which measures performance for tasks such as copying photos, music and videos. Effective speed is adjusted by price and capacity to yield value for money. Finally thousands of individual user ratings are used to validate our benchmark figures. Vote to share your opinion. [USBFlashPro]


Stays-put storage for all your devices...

Added 2 years ago.

Good (edit your comment) Add link

3 days ago.

As the other noted, this device is VERY SLOW. They TRICKED THE BENCHMARKS. Probably filling in some buffer in the driver instead of writing to the device, and only later dumping the data.


6 days ago.

Image  s23.postimg.org/...
напоминает SanDisk nCache 2.0

напоминает SanDisk nCache 2.0


3 months ago.

Testing software isn't relieable because it shows fake write speed which includes write buffer. The real write speed is ~10MB/s so it is really slow for that capacity. Even my old pendrive - Kingston Data Traveler 8GB USB2.0 has above 20MB/s write speed


5 days ago.

excellent value- fastest usb I have because im a cheapie


2 months ago.

It works fine.


2 months ago.



26 days ago.

The real write speed when copying data is ~10MB/s.

Very good

2 years ago.


6 months ago.

Real-world write speeds are only 10-12MB/s which is very poor. The benchmarks seem incorrect.

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613 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different USBs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

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