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SanDiskSDCZ80-064G
SanDiskSDCZ43-064G-G46
▲ 818,939 ▼

Release date: Q2 2012.

VS
Copy
▲ 611,604 ▼

Release date: Q3 2014.

Effective Speed 
+164%
Real World Speed
Performance profile from 8,270 user samples
Benchmark your USB here
4,165 User Benchmarks
Best Bench: 110% 53GB free, PID 5580 @USB 3.0
Worst Bench: 22% 32GB free, PID 5580 @USB 3.0
Poor: 22% Great: 110%
SPEED RANK: 8th / 639
4,105 User Benchmarks
Best Bench: 39% 58GB free, PID 5583 @USB 3.0
Worst Bench: 12% 5GB free, PID 5583 @USB 2.1
Poor: 12% Great: 39%
SPEED RANK: 130th / 639
Effective Speed
Effective USB Speed 		70.7 % Hugely faster effective speed.
+164% 		26.8 %
Peak Lab Bench 
+104%
Read
Peak Sequential Read Speed 		197 MB/s Faster peak read speed.
+29% 		153 MB/s
Write
Peak Sequential Write Speed 		188 MB/s Hugely faster peak write speed.
+108% 		90.4 MB/s
4K Read
Peak 4K Random Read Speed 		13 MB/s Hugely faster peak random read.
+94% 		6.7 MB/s
4K Write
Peak 4K Random Write Speed 		8.9 MB/s Hugely faster peak random write.
+187% 		3.1 MB/s
Value & Sentiment 
+8%
Value
Value For Money 		57.1 % Much better value.
+38% 		41.5 %
User Rating
UBM User Rating 		81 % Much more popular.
+33% 		61 %
Price
Price (score) 		$43 $23 Much cheaper.
+48%
Nice To Haves 
+34%
Age
Newest 		77 Months 51 Months Much more recent.
+34%
Specifications 
Capacity
Capacity 		64GB 64GB
Conclusion 
Average Bench 70.7%
Average Bench 26.8%
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For real world usability this is currently the best 64GB flash drive (superseded by the Ventura Ultra - 2014). It has a very balanced performance profile with an exceptional 4K random write speed. The 16GB version of the Extreme is currently the value leader in the USB 3.0 flash drive shootout. At present there are no viable alternatives to the 64GB Extreme in fact the Corsair voyager GT turbo is the only drive on the horizon that may challenge the Sandisk any time soon. There are however several reports (Newegg, Amazon) of compatibility issues with this, the 64GB version (other versions are fine), so if you do go for the 64GB version, don't throw the receipt away in a hurry. [Feb '13 USBFlashPro]

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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]

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USB Flash Drive Rankings (Price vs Performance) November 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]

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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.
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.
  • - 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.
  • - 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.
  • - Share your opinion by voting.

 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
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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i7-8700K $340Nvidia GTX 1070 $329Samsung 850 Evo 250GB $55
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $220Samsung 850 Evo 500GB $100
Intel Core i5-8600K $240Nvidia GTX 1080-Ti $799Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $120SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
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