I have mine working in single core mode on windows using the cgminer and guide at
http://cryptomining-blog.com/1262-download-cgminer-3-7-2-for-windows-scrypt-mining-on-gridseed-5-chip-gc3355-asics/I have found that after every use I have to unplug and plug it back in again or disable and re-enable in device manager.
Cgminer is reporting 404 khash/s with 950mhz clock. It got to 424 on 1000mhz but I just figured that I'd let it run at 950mhz because its probably more stable at that speed (although I haven't had any hardware errors yet). I don't have a good way of measuring the temperature, but it isn't all that warm to the touch.
I can try and answer any questions about setting it up
What OS are you using? I'm on Win 7 64bit. Zadig installs ok, I just get an error saying no device detected.
When I install Zadig is shows up as a STM com port, not "CP2102 USB to UART Bridge Controller" as mentioned on the blog. Not sure this really makes a difference.
I'll try again tomorrow, I'd like to get GPU and ASIC's mining happily with one CMD window open.
I'm on Windows 8 64bit. Mine also came up as something other than "CP2102 USB to UART Bridge Controller,'' it might have been STM port as that sounds familiar.
Did you try just disabling and re-enabling the virtual port in device manager? That seems to fix the no device detected error in cgminer for me