Effective Speed: Terrible (9th percentile)

We are a bit disappointed with this drive, our expectations were sky high but poor Crystalmark & ATTO benchmark results have let us down. We have only managed to observe a sequential read speed of 50 MB/s which is 20 MB/s less than we were expecting, there are several similar reports from disgruntled users confirming our findings. The JetFlash 700 is priced very aggressively at £13 which is a significant discount to the original prices for this drive. We suspect that there have been several batches of these drives produced with varying performance profiles, this would explain why the drives have dropped in price so much recently. In terms of performance this drive proved to be amongst the weaker USB 3.0 flash drives. [Jun '12 USBFlashPro]

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Review

Packaging & Contents Dimensions & Weight Build Quality CrystalDiskMark Benchmark Speed Test ATTO Benchmark Speed Test AS-SSD Benchmark Speed Test Conclusion

Packaging & Contents

The JetFlash 700 ships in a flat packed piece of cardboard with a small plastic shell housing the unit. There are perforations on the cardboard making it easy to open the box without scissors or a knife. The drive comes with a lifetime warranty which is clearly stated on the bottom right of the box. There are links to the Transcend website allowing you to register your warrantly and download Transcends flash drive software bundle which includes a data recovery module. On the back of the box there is some general information relating to how much data you can fit on various capacities of flash drive.

Transcend JetFlash 700 USB 30 16GB Box Front
Transcend JetFlash 700 USB 30 16GB Box Back

Dimensions & Weight

The JetFlash 700 measures 7.0cm long, 2.0cm wide and 0.9cm high which is below average in terms of total size and bulkiness for a flash drive. As well as being one of the smallest drives on test the JetFlash is also pretty light weighing in at just over 10 grams, its small form factor and weight make this drive reasonable for shirt pocket use.

Transcend JetFlash 700 USB 30 16GB Length Ruler

Build Quality

The JetFlash 700 is reasonably well made. The casing is solid black plastic and has a small hole at the back where you can securely attach a keychain. There is a small indicator light but its inside the plastic and you can only tell its there when the drive is active. The cap is difficult to remove because the shiny plastic surface is hard to grip but that's a good thing as it reduces the risk of loss. The drive is all held together very securely and has a nice simple but solid feel to it.

Transcend JetFlash 700 USB 30 16GB Front
Transcend JetFlash 700 USB 30 16GB Back

Test System

The test rig was a high end Core-i7 workstation kitted out with a 256GB Solid State drive and 16GB of RAM. The system was designed to be overclocked to 5GHZ but for the benchmarks, only the stock frequencies of 1.6GHz idle, 3.4GHz active and 3.8GHz turbo boost were used.
Motherboard ASUS P8Z68-V GEN 3
RAM Corsair Vengeance 16GB Dual Channel DDR3 (CML16GX3M4A1600C9)
Fixed Drive Corsair Performance Pro 256GB
CPU Intel Core i7-2600K
Operating System Windows 7

CrystalDiskMark Speed Test[FAQ]

CrystalDiskMark is a free disk benchmarking utility that is very simple to use. It takes eight measurements: the read and write speeds in megabytes per second (MBps) for sequential, 512KB, random 4KB and 4KB parallel disk operations. There are more screenshots from this benchmark posted on the web than any other, probably due to its clean and simple display. There is further information, including instructions on how to benchmark your own drives, on the CrystalDiskMark wiki page.

CrystalDiskMark Score

The benchmark score for the JetFlash 700 is very disappointing. The widely reported read/write speeds for this drive (16GB) are 70/20 MB/s but in our benchmark the drive only managed to score 50/17 MB/s. We are not alone in finding this as we have seen several reports on the internet from consumers seeing the same issue. The slower than expected speeds make the JetFlash 700 one of the slowest USB 3.0 drives we have on test. Finally, as with many flash drives the JetFlash 700 struggled is in the random write tests where it scored just 0.3 MB/s which is in line with several other flash drives we have looked at.

Crystaldiskmark Benchmark

ATTO Disk Benchmark[FAQ]

The Atto Disk Benchmark has probably been around for longer than any other disk benchmarking software, and you can tell from its dated interface! The utility was designed to measure regular disk drive performance but it's more than up to the task of measuring both USB flash drive and SSD speeds as well. The utility measures disk performance rates for various sizes of file and displays the results in a bar chart showing read and write speeds at each file size. The results are displayed in megabytes per second (MBps). There is further information, including instructions on how to benchmark your own drive, on the Atto wiki page.
ATTO Benchmark

ATTO Score

The ATTO results for the JetFlash 700 are exactly in line with the CrystalDiskMark scores and show average sequential read/writes at 50/18 MB/s this is significantly lower than Transcends claimed 70/20 MB/s and a very disappointing result for this ubiquitous drive. Its nice to see the benchmarks validating each other in this case.

AS SSD Real World Copy Speed[FAQ]

The AS SSD benchmarking program was recently developed specifically for benchmarking SSD's. The utility is able to take several measurements that are well suited to solid state drives. One of the tests, ISO copy, is also relevant to slower storage devices including flash drives. The ISO copy test places two large 500MB files in a folder on the drive and then times how long it takes to copy the folder to another location on the same drive. The result is reported in both MBps and time taken. It's a real-world test that gauges a drives ability to read and write at the same time. Drives that have a good balance between their read and write speed fare relatively well on this test. There is further information, including instructions on how to use it to benchmark your own drive, on the AS SSD wiki page.

Real World Copy Speed Score

This test shows that the JetFlash 700 would take 90.96 seconds to create a copy of a large 1GB video file. This score is above expectations for this drive. Generally flash drives complete this test at roughly half their sequential write rates, the JetFlash beat that by 39.7% achieving a score of 11.81 MB/s.

AS-SSD Copy Benchmark

Conclusion

We are a bit disappointed with this drive, our expectations were sky high but poor Crystalmark & ATTO benchmark results have let us down. We have only managed to observe a sequential read speed of 50 MB/s which is 20 MB/s less than we were expecting, there are several similar reports from disgruntled users confirming our findings. The JetFlash 700 is priced very aggressively at £13 which is a significant discount to the original prices for this drive. We suspect that there have been several batches of these drives produced with varying performance profiles, this would explain why the drives have dropped in price so much recently. In terms of performance this drive proved to be amongst the weaker USB 3.0 flash drives.

Original Review by:  
Updated 5 years ago.  
Transcend JetFlash 700 USB 30 16GB Front

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 Comments

JetFlash®700...

Added 5 years ago.

Disliked

4 months ago.

Deal  kursk.dns-shop.ru/...

Память USB 3.0 Flash Transcend 16Gb JetFlash 700 Купить память usb flash Transcend за 650 руб.купить Гарантия: 12 мес.


Poor

15 months ago.

very slow and just stops working if you try und move more than one file at a time


Good

14 months ago.

bought 2 devices, the 2 are dead 3 years after


Poor

8 months ago.

I have it and really it has a very low write speed.. you can get others pendrivers in the same price window with te same capacity with better perfomance..


Poor

12 months ago.

Good enough for upto Rs.500


Good

5 months ago.

nice read rate, but write are poor. mine got 70/10. but considering the aggressive price (US$8) I think it's fine.


Poor

14 months ago.

The test is out of date. Change of product. USB3.0 78/10 MB/s, USB2.0 30/9 MB/s

Image  mobilarena.hu/...

Image  mobilarena.hu/...
USB3.0

USB3.0

Image  mobilarena.hu/...
USB2.0

USB2.0


Poor

14 months ago.

Stopped working in a few months


Disliked

7 months ago.

Comment 

Please try to improve your products. The worst i have ever used. After years, thought i give another shot, still disappointing!!!. Test them before sale. You are shooting yourselves in the foot. Extremely poor and mediocre!—Sep '14


Terrible

5 years ago.

Review  www.whoratesit.com/...

Read my full review and see the benchmark test results.


Very good

5 years ago.

Excellent value for money - most usb sticks are still USB 2.0 and cost about the same, this guy is about three times faster than those. Pros: Superb read and write speed, next gen USB 3.0. Cons: Build quality is not great.


Below average

5 years ago.

I have had a super talent express duo for about a year now, this one has the same specs at half the price which means I could get the 32GB version for the same price as a 16GB Super Talent Express Duo. Even so there are faster and cheaper drives around now, this one used to be great, but not any more. It's not expensive but there is much better value for money elsewhere.


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