Average Bench: 19.9% (210th of 639)

Based on 2,736 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]


Terrible average bench

The SanDisk Ultra Fit USB 3.0 16GB averaged 80.0% 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 1.19MB/s
Avg. 4K Random Mixed IO Speed 0.7MB/s

Good consistency

The range of scores (95th - 5th percentile) for the SanDisk Ultra Fit USB 3.0 16GB is 23.1%. 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 16MB/s
Avg. Sequential Mixed IO Speed 21.2MB/s

Average Bench

(Based on 2,736 samples)
Min Avg Max
26.7 Read 80.5 130
6.2 Write 16 38.9
8.58 Mixed 21.2 50.3
37.6% 39.2 MB/s
Min Avg Max
2.97 4K Read 4.74 6.4
0.33 4K Write 1.19 1.55
0.16 4K Mixed 0.7 0.9
81.9% 2.21 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
8GB free, PID 5583
Operating at USB 3.0 Speed
Read 129
Write 43.8
Mixed 52.5
80% 75.2 MB/s
4K Read 5.65
4K Write 1.32
4K Mixed 0.93
98% 2.63 MB/s
14GB free, PID 5583
Operating at USB 3.0 Speed
Read 116
Write 19.9
Mixed 30.6
52% 55.5 MB/s
4K Read 5.66
4K Write 1.5
4K Mixed 0.86
101% 2.67 MB/s
14GB free, PID 5583
Operating at USB 3.0 Speed
Read 95.3
Write 34.6
Mixed 42.1
62% 57.3 MB/s
4K Read 5.15
4K Write 1.26
4K Mixed 0.92
94% 2.45 MB/s
8GB free, PID 5583
Operating at USB 3.0 Speed
Read 126
Write 11.4
Mixed 24.1
47% 53.9 MB/s
4K Read 6.74
4K Write 1.22
4K Mixed 0.3
77% 2.75 MB/s
2,736 MORE »


Approx. $12 @ launch in Aug '14
EbayUS $814 mins
AmazonUS $1027 mins
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Typical Ultra Fit USB 3.0 16GB Builds (Compare 20,405 builds) See popular component choices, score breakdowns and rankings.
Gaming 94%
Nuclear submarine
Desktop 85%
Aircraft carrier
Workstation 65%

Motherboard: Asus Z170 PRO GAMING - $157

EDIT WITH CUSTOM PC BUILDER Value: 84% - Excellent Total price: $1,231

Popular Ultra Fit USB 3.0 16GB compatible motherboards:

How Fast Is Your USB? (Bench your build) Size up your PC in less than a minute.

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.

UserBenchmark of the month

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.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
USB Flash Drive Rankings (Price vs Performance) May 2018 USB Rankings.

We highlight the best USB flash drive in terms of balanced performance and value for money using current prices, 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 current price and capacity to yield value for money. Finally thousands of individual user ratings are used to validate our benchmark figures. [USBFlashPro]

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest real world speed - Real World Speed measures performance for typical flash usage patterns.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.


Stays-put storage for all your devices...

Added 3 years ago.


13 months 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


2 months ago.

excellent value- fastest usb I have because im a cheapie


11 months ago.

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

Very good

3 years ago.


21 months ago.

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

639 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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