I recently installed F13 on a system with nForce 4 chipset. It consistently failed when trying to boot x86_64. Both from USB stick and from live CD. I didn't try x86_64 install DVD. Instead I fell back to a USB memory stick with i686 live instead, and it worked just fine.
I see you are also trying with a nForce based motherboard. Have you tried x86_64 or i686?
I don't really think you are seeing the same problem that I have, as my system fails before getting up the graphical interface from the live environment. It fails with filesystem decompression errors, both from CD and memory stick.