Hi, I just received a new ROACH 2 and was starting out by hooking up the USB FTDI port to my Windows 8.1 laptop. I let it install a driver for the FTDI chip and all seemed fine, I could see the uboot prompt etc. However, then the board started rebooting itself every ~ 10 seconds. I suspected a hardware problem, but eventually I got my DHCP server configured to give the ROACH an IP address. I disconnected the USB cable from my laptop and rebooted the ROACH 2, after which I was able to connect by ssh and KATCP and everything seemed fine. I then moved the USB cable to a CentOS computer and that seems to work without causing reboots. So the moral of the story is: beware trying to use the default FTDI Windows 8.1 driver that windows installs for you.
Glenn