Hello everyone

I installed a 990Pro on my Dell Precision 3571 as secondary disk.

I have updated the PC, bios included, I have updated magician to today's version (7.2.1), and windows is up to date. I tried to install Samsung_NVM_Express_Driver_3.3 but during the installation I get the "device not connected" message.

After running a benchmark test I noticed the performance is low (3720MB/s sequential read, 2009MB/s sequential write) Samsung Magician shows me that the driver interface is not identified, I attach a printscreen of magician and the device manager window.. 

How can I install the driver for this disk correctly? can someone help me?