Quick and large

The memory has been tested on a mini-PC 'Intel NUC kit D34010WYKH. Win 7 64bit is installed in.
All drivers up to date.

ChrystalDiskMark results:

Sequential Read: 134 562 MB / s
Sequential Write: 26 479 MB / s
Random Read 512KB: 57 801 MB / s
512KB Random Write: 0.320 MB / s
4KB Random Read (QD = 1): 5,150 MB / s [1257.4 IOPS]
Random Write 4KB (QD = 1): 1,036 MB / s [253.0 IOPS]
4KB Random Read (QD = 32): 4,605 ​​MB / s [1124.3 IOPS]
Random Write 4KB (QD = 32): 2,187 MB / s [534.0 IOPS]

Many testers make the mistake and start the test with 100 MB. Which of course is complete nonsense.
The stick has to run with larger file longer. Only then you can see the long-term performance.
So at least 1000MB, 2000MB better. So you just go on real conditions.

The real write performance of the 64GB version is about 25-30MB. No more.

In addition, it is always good to mention what system you use, the better the controller to the stick dm sitting.
The USB3 is far from USB 3. Even today, depending on the PC it is far away from the "standard".

Same test under Win 8.1 64bit
You can see the differences in the operating systems and their drivers.

Sequential Read: 140 137 MB / s
Sequential Write: 42 019 MB / s
Random Read 512KB: 111 606 MB / s
512KB Random Write: 0.292 MB / s
4KB Random Read (QD = 1): 4,355 MB / s [1063.3 IOPS]
Random Write 4KB (QD = 1): 1,709 MB / s [417.1 IOPS]
4KB Random Read (QD = 32): 4,402 MB / s [1074.7 IOPS]
Write 4KB (QD = 32): 1,999 MB / s [488.1 IOPS]