I have exactly same situation... Got 770, got WSOD, got 810... Now I want to put 770 in use, like you
But I haven't reflashed it, since I did not find any solution to WSOD...
Maybe, there is a way to repair broken video card (or any other thing, that makes WSOD), but I haven't found...
I have thought about possibility to set up apache on 770, but havent tried it either... :P
I will watch this post, hoping to get some answers too...