TEST
YOUR USB

JMicron (ExtHD)

Generic 256GB

▲ 500 ▼

Release date ≈ Q3 2014.

Average Bench: 145% (1st of 639)

Based on 25 user benchmarks.  Device: VID 152d PID 0567 Model: JMicron Generic
Poor: 33%Average: 145% Great: 219%

Outstanding average bench

The JMicron Generic 256GB averaged 45.3% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the JMicron Generic 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 31.7MB/s
Avg. 4K Random Write Speed 21.2MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the JMicron Generic 256GB is 186%. This is a particularly wide range which indicates that the JMicron Generic 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 240MB/s
Avg. 4K Random Read Speed 16.1MB/s
ADVERTISEMENT

Average Bench

(Based on 25 samples)
Rank 1145%
Min Avg Max
31.2 Read 240 397
25.9 Write 207 392
28.2 Mixed 202 385
24.5 SusWrite 192 394
281% 210 MB/s
Min Avg Max
7.18 4K Read 16.1 25.3
1.2 4K Write 21.2 48.4
4.03 4K Mixed 15.4 25.1
1,307% 17.6 MB/s
Min Avg Max
11.5 DQ Read 19.8 26.6
13 DQ Write 31.7 68.4
6.37 DQ Mixed 18.9 29.8
1,793% 23.5 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
238GB free, PID 0567
Operating at USB 3.0 Speed
SusWrite @10s intervals: 393 393 398 395 392 395 MB/s
210% Outstanding
Read 307
Write 379
Mixed 277
SusWrite 394
473% 339 MB/s
4K Read 18.5
4K Write 24.4
4K Mixed 20.9
1,609% 21.3 MB/s
DQ Read 20.7
DQ Write 37.1
DQ Mixed 25.4
2,203% 27.7 MB/s
162GB free, PID 0567
SusWrite @10s intervals: 45 46 45 46 46 46 MB/s
82.7% Excellent
Read 44.8
Write 45.1
Mixed 44.6
SusWrite 45.5
62% 45 MB/s
4K Read 15.2
4K Write 20.4
4K Mixed 16.8
1,322% 17.5 MB/s
DQ Read 18
DQ Write 26.4
DQ Mixed 20.9
1,676% 21.8 MB/s
194GB free, PID 0567
Operating at USB 2.1 Speed
SusWrite @10s intervals: 43 43 43 43 43 43 MB/s
79.3% Very good
Read 42.6
Write 42.5
Mixed 42.5
SusWrite 42.8
58% 42.6 MB/s
4K Read 15.2
4K Write 19.6
4K Mixed 16.6
1,288% 17.1 MB/s
DQ Read 15.5
DQ Write 24.8
DQ Mixed 17.8
1,506% 19.4 MB/s
25 MORE »
Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
How Fast Is Your USB? (Bench your build) Size up your PC in less than a minute

Welcome to our 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

How it works

  • - Download and run UserBenchmark
  • - CPU tests include: integer, floating and string
  • - GPU tests include: six 3D game simulations
  • - Drive tests include: read, write, sustained write and mixed IO
  • - RAM tests include: single/multi core bandwidth and latency
  • - SkillBench (space shooter) tests user input accuracy
  • - 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 current market leaders
  • - Explore your best upgrade options with a virtual PC build
  • - Compare your in-game FPS to other users with your hardware
USB Flash Drive Rankings (Price vs Performance) April 2024 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]

ADVERTISEMENT

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.

 Comments

Added n/a ago.
Your
opinion?
▲Like ▼Dislike
Ready to retire
Age: 9 years

Speed Comparisons

vs SanDisk Extreme 64GB
vs SanDisk Extreme 32GB
vs SanDisk Ultra Fit 32GB
vs SanDisk Extreme 16GB
vs Lexar JumpDrive P20 64GB
vs Adata DashDrive UV128 32GB
vs SanDisk Ultra Fit 16GB
vs Corsair Flash Voyager GT 32GB
vs Lexar JumpDrive P20 32GB

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.

 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
USB Flash Drives
How do you install an OS from a USB flash drive?
What is the Flash Drive value for money rating?
What is effective USB Flash Drive speed?
Why should USB 2.0 Flash Drives be avoided?
File system considerations?
Do dimensions matter?
What are the main factors to look out for?
16GB USB Flash Drives
Why is bigger better?
ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $269Nvidia RTX 4060 $295Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
If you make a purchase via one of these links, our site may earn a commission
Today's hottest
Amazon Ebay
deals
CPU GPU SSD HDD USB RAM MBD
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback