I tried the newest one from the second of October, but it also doesn't boot. I'll try to open a bug at this point I guess.
Those CPUs are x64, but more importantly at the moment I'm trying to install it on a virtual machine on my 1 year old laptop, which is definitely x64 :D
You're right that I didn't select it there, but when the no bootable media found showed up I opened up the boot manager and selected the QEMU DVD-ROM, but with no luck. Regardless, now I enabled it, but it still won't boot.