TEST
YOUR USB

Samsung (ExtHD)

SSD 840 Series 250GB

▲ 500 ▼

Release date ≈ Q3 2015.

Average Bench: 63.1% (10th of 639)

Based on 4 user benchmarks.  Device: VID 152d PID 2352 Model: Samsung SSD 840 Series
Poor: 36%Average: 63.1% Great: 80%

Above average average bench

The Samsung SSD 840 Series 250GB averaged 36.9% 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.

Strengths

Avg. 4K-64Thread Write Speed 21MB/s
Avg. 4K Random Write Speed 15.9MB/s

Unknown consistency

There are too few samples to reasonably determine how consistently this USB perfroms. This result should be interpreted with caution.

Weaknesses

Avg. Sequential Read Speed 36.1MB/s
Avg. Sustained Write Speed 24.7MB/s
ADVERTISEMENT

Average Bench

(Based on 4 samples)
Rank 1063.1%
Min Avg Max
29.3 Read 36.1 42.7
26.2 Write 34.7 43.1
11.5 Mixed 28.2 40
24.7 SusWrite 24.7 24.7
41.2% 30.9 MB/s
Min Avg Max
7 4K Read 9.55 12.8
7.74 4K Write 15.9 20
4.62 4K Mixed 7.61 11.7
836% 11 MB/s
Min Avg Max
6.88 DQ Read 11.2 13.4
20.3 DQ Write 21 22.3
7.73 DQ Mixed 8.2 8.5
1,034% 13.4 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
29GB free, PID 2352
Operating at USB 2.0 Speed
80% Excellent
Read 42.7
Write 43.1
Mixed 40
54% 41.9 MB/s
4K Read 12.8
4K Write 20
4K Mixed 8.36
1,012% 13.7 MB/s
DQ Read 13.4
DQ Write 20.3
DQ Mixed 8.38
1,024% 14 MB/s
24GB free, PID 2352
Operating at USB 2.0 Speed
SusWrite @10s intervals: 36 23 20 24 20 25 MB/s
71.9% Very good
Read 38.8
Write 42
Mixed 11.5
SusWrite 24.7
38% 29.2 MB/s
4K Read 10.7
4K Write 19
4K Mixed 11.7
1,084% 13.8 MB/s
DQ Read 13.2
DQ Write 20.4
DQ Mixed 8.5
1,032% 14 MB/s
232GB free, PID 2352
Operating at USB 2.0 Speed
64.7% Good
Read 33.8
Write 27.5
Mixed 34.5
41% 31.9 MB/s
4K Read 7
4K Write 17
4K Mixed 5.77
800% 9.92 MB/s
DQ Read 6.88
DQ Write 22.3
DQ Mixed 7.73
1,046% 12.3 MB/s
82GB free, PID 2352
Operating at USB 2.0 Speed
35.6% Below average
Read 29.3
Write 26.2
Mixed 26.9
35% 27.5 MB/s
4K Read 7.74
4K Write 7.74
4K Mixed 4.62
449% 6.7 MB/s
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: 8 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