Is this USB Stick speed normal?

I've tested HD Tune Pro and Crystal Disk Mark but i get the feeling that something is not right with those programs or it just maybe my computer or OS. I always get lower results than expected or odd ones...

This is the flash drive. (Kingston DataTraveler HyperX 3.0 USB3 64GB)

It is supposed to reach around 200 MB/s reading and 100 MB/s writing. It rarely reaches 200 MB/s. (random peaks) Normally 100 MB/s at most 150 MB/s. But the graph goes up & down all the time, i don't know if that is a normal behaviour...

This is with HDTune:

In this other run you can see a 275! peak. God, this is so random... /facepalm.

One thing to take into account is that i don't have USB3 in my motherboard, i bought a dedicated PCIE 1x (2.0) card with 2 USB3. But i don't think that is a problem because PCIE is way faster than USB3.

Also i formatted this thing with standard NTFS 4Kb per sector.

 

File Benchmark:

I don't know exactly what this block size measurement test means. Are the block sizes in KB? (i guess so)

Random Read:

What do you guys think?

Results seem about right mate.