Hello,
I've flashed 15.10 to my USB stick and ran it without installing. The very first problem I encountered was that some characters were displayed incorrectly and the resolution was very low (1024x768 compared to 1920x1080, my native res), and the monitor is labeled as unknown.
Images:
Also, the PPPoE internet connection doesn't seem to work, I tried both via edit connection menu and the terminal way. None of them work.
Hardware that I use:
GPU: nVidia GTX 750 Ti
CPU: AMD FX-4300
Mobo: ASRock 980DE3/U3S3