thanks very much for fast answer, I will make arranges to my rig.

Grettings all,

I started a mining rig grid seed-blade, I got a total of 6 units but for some reason sometimes 2 or 3 of them does not work I mean, the MH/S shows "0". while the others works fine. and then when I disconnect all and then only connect those one that did not work, then they work fine.  what should I do?

i got all conectes to a multi high speed port where I can connect different usb. maybe I need another group of usb port? maybe code is wrong?

no I sea what happen , this is my mining code:

bfgminer.exe --scrypt -o stratum+tcp://stratum.nicehash.com:3333 -u 1LZQDFquKUppvkbjUaXFQcA7T9hfGn7K16 -p x -d gridseed -S gridseed:all --set-device gridseed:clock=850


Any ideas?