Today I got two SanDisk Extreme pro 64GB 95MB/S , the Max write speed is 27MB/s sometimes up to 30 or 34 (27MB/S is constant unlike 30 or 34) on my laptop , and read speed of 90MB/S on my laptop too , on the camera with and without sd_uhs the write speed is always 27MB/S the read speed is high as expected 78MB/S
How can I know if it was fake or not ? is there a software to do the benchmark for write/read speeds ?
I tried to format the cards in NTFS same things , also as I know the write speed is the main standard thing to know if the card speed is true U3 or not , the read speed isn't important ? because I have normal 32 GB card class 10 from Grand brand the write speed is 25MB/S and the read speed goes up to 80MB/S .
Please help , to know if I am doing something wrong or not , I can replace them but I should make sure more.
Some pic:

