Not sure what I am missing, but what screw are you using to attach the Nepton 280L cooling head to the board, nothing seems to fit.
I had to go to home depot and get 8x 3/4" 6-32(think thats what they are, well normal coarse thread PC) screws
Same here. I actually prefer this method to the thumbscrews, have more control and easier to make small adjustments.
http://i.imgur.com/R8Sytcj.jpgThanks.. Got it sorted

Anyone know what is this error?
[2014-06-25 00:22:11] Hotplug: Hashfast added HFA 50
[2014-06-25 00:22:12] HFA 50 HFUSBInit usb write err:(-7) LIBUSB_ERROR_TIMEOUT
[2014-06-25 00:22:12] HFA 50 attempted reset got err:(0) LIBUSB_SUCCESS
[2014-06-25 00:22:12] HFA : send_packet: OP_USB_INIT USB Send error, ret 0 amount 0 vs. length 8
[2014-06-25 00:22:17] HFA 0: No response to name query - failed init or firmware upgrade required.
[2014-06-25 00:22:17] Hotplug: Hashfast added HFA 51
[2014-06-25 00:22:18] HFA 51 HFUSBInit usb write err:(-7) LIBUSB_ERROR_TIMEOUT
[2014-06-25 00:22:18] HFA 51 attempted reset got err:(0) LIBUSB_SUCCESS
[2014-06-25 00:22:18] HFA : send_packet: OP_USB_INIT USB Send error, ret 0 amount 0 vs. length 8
[2014-06-25 00:22:23] HFA 0: No response to name query - failed init or firmware upgrade required.
[2014-06-25 00:22:23] Hotplug: Hashfast added HFA 52
[2014-06-25 00:22:24] HFA 52 HFUSBInit usb write err:(-7) LIBUSB_ERROR_TIMEOUT
[2014-06-25 00:22:24] HFA 52 attempted reset got err:(0) LIBUSB_SUCCESS
[2014-06-25 00:22:24] HFA : send_packet: OP_USB_INIT USB Send error, ret 0 amount 0 vs. length 8
Double check that all the PCIe power cables are properly attached, and then power cycle the unit (with USB unconnected, the USB cable can power the board).