USB HuB:

http://www.pcworld.co.uk/gbuk/pc-accessories/usb-expansion-hubs/external-expansion-hubs/advent-hb312-7-port-usb-2-0-hub-13828377-pdt.html?intcmpid=display~RR~Home+%2f+PC+Accessories+%2f+USB+Expansion+Hubs+%2f+External+Expansion+Hubs~13828377

So basically, i have an external usb ports which work, but when i put more than 3 in, there are many nonce errors which really bug me, I have 6 asic miners all together and I want to put them all in but this error obviously means i don't get as much shares. I am using CGminer and it is good but I get many Invalid nonce - HW errors which annoys me, so please if anyone can help, please reply to this post!