Can anyone verify if these guys a legit?  I can't find an address on them.  The only contact on their website is an email.

When & how will I be able to mine this?

I am using an Avalon 741 on slushpool.  Just connected it last week.  When I first connected slushpool showed my hashrate between 7-8T and my Avalon dashboard showed the same.  Now slushpool is constantly showing about 6.5T but my dash is showing 7-8T.  Why the discrepancy?

FYI
I Fixed It!!!
Reinstalled Invidia driver & reboot.
Then - DAG Error 11
Increased virtual memory from 16 to 32
RX580's seem slow, I will have to look into OC Bios

One glitch I've noticed - Win10 - When 2nd bank of GPU's is used - When I try to click on the Window/Start Button nothing happens.  I have to right click and choose an option from that menu.  Wish I new Linux.  But I barely know Windows.

I have this board and was running 6 gtx1070's with claymore.  Decided to add more GPU's.  I am running Win10.  I was told I could only run 8 invidia & 8 AMD.  So I purchased 3 RX580's.  Now the Bios sees all the GPU's but Windows only recognizes 5 of the 1070's.  Any help would be appreciated.