I previously had Mint 14 on this system and it worked fine. I wiped installed Mint 15 64b w/ Cinnamon as a fresh install and I get this when I boot up:
When I boot from the USB Stick with the Mint 15 live, it boots up just fine and I can install it just fine. And Mint 14 worked fine.
I don't even get a GRUB screen that I might be able to change the boot parameters.
Edit 1: Managed to get into the GRUB screen and launch from recovery mode and I get the same. At least I am into GRUB now, and I can try to boot to the command line.