Average Bench: 26.3% (125th of 618)

Based on 2,008 user benchmarks.  Device: VID 0781 PID 5583 Model: SanDisk Ultra Fit

The 64GB SanDisk Ultra Fit is the largest capacity available in the Ultra Fit range. Both the 16GB and 32GB siblings fared well in terms of peak performance but with the majority of flash based products larger capacities are faster. Unfortunately for the Ultra Fit this proved not to be the case. Comparing the performance leading Mushkin Ventura and 64GB Ultra Fit shows that the Ventura is around 600% faster but just 60% more expensive. Although the Ultra Fit is a contender in the 32GB and 16GB capacities it doesn't fare well against the 64GB competition. If you are looking for a tiny form factor the 64GB SanDisk Ultra Fit is superb but otherwise there are better alternatives available with better peak and significantly better sustained transfer speeds. [Oct '14 USBFlashPro]


Very poor average bench

The SanDisk Ultra Fit USB 3.0 64GB averaged 73.6% 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 1.4MB/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 64GB is 28.6%. This is a relatively narrow range which indicates that the SanDisk Ultra Fit USB 3.0 64GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Read Speed 4.47MB/s
Avg. Sequential Write Speed 31.5MB/s

Average Bench

(Based on 2,008 samples)
Min Avg Max
27.1 Read 97.1 143
8.26 Write 31.5 56.7
10.7 Mixed 38.5 64.5
58.9% 55.7 MB/s
Min Avg Max
2.93 4K Read 4.47 5.63
0.84 4K Write 1.4 1.86
0.56 4K Mixed 0.7 0.81
88.1% 2.19 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest USB (mainstream) averages a speed of 100%
57GB free, PID 5583
Operating at USB 3.0 Speed
Read 113
Write 25.8
Mixed 28.4
54% 55.7 MB/s
4K Read 5.08
4K Write 1.84
4K Mixed 0.78
108% 2.57 MB/s
57GB free, PID 5583
Operating at USB 3.0 Speed
Read 111
Write 26.1
Mixed 31.5
55% 56.3 MB/s
4K Read 5.01
4K Write 1.85
4K Mixed 0.78
108% 2.55 MB/s
46GB free, PID 5583
Operating at USB 3.0 Speed
Read 111
Write 24
Mixed 30.5
54% 55.3 MB/s
4K Read 5.45
4K Write 1.91
4K Mixed 0.8
112% 2.72 MB/s
32GB free, PID 5583
Operating at USB 2.1 Speed
Read 35.3
Write 14
Mixed 15.3
24% 21.6 MB/s
4K Read 4.88
4K Write 1.9
4K Mixed 0.78
109% 2.52 MB/s
2,008 MORE »


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Typical Ultra Fit USB 3.0 64GB Builds (Compare 16,271 builds) See popular component choices, score breakdowns and rankings.
Gaming 95%
Nuclear submarine
Desktop 86%
Aircraft carrier
Workstation 66%
Battle cruiser

Motherboard: Asus Z170 PRO GAMING - $127

EDIT WITH CUSTOM PC BUILDER Value: 86% - Excellent Total price: $1,076

Popular Ultra Fit USB 3.0 64GB 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.

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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.
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USB Flash Drive Rankings (Price vs Performance) August 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]


So small you hardly know it’s there...

Added 2 years ago.


4 months ago.

Met max benchmark speeds. Outdoes many larger thumb-drives. Crazy-small form-factor. Excellent value.


2 years ago.

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618 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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Intel Core i7-7700K $300Nvidia GTX 1070 $410Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $280AMD RX 480 $390Samsung 850 Pro 256GB $118
Intel Core i5-7600K $220Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $718SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $140SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $57HyperX Fury DDR4 2133 C14 2x8GB $139SanDisk Ultra Fit 32GB $13
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