I have the following selection of components:
intel core i7 4770
Asus Sabertooth Z87
16GB ram
Gigabyte windforce GTX 780
(and a spare Gigabyte H81M-D2V which oddly enough shows a VT-d option in the bios with the 4770 in it).
is the motherboard good for gpu passthrough or should I abandon hope and wait to have money for a ryzen system?
I can post the output of the iommu groups if needed but the machine is currently off.
if it is a good motherboard then should I try using fedora or ubuntu or what distro and which guide should I follow since there have been two guides posted here?
Archlinux is probably the best, even has a precompiled ACS patched kernel in the repos if you need it. Just use the archwiki, look up “PCI passthrough via OVMF”
If you don’t want to fiddle with setup but still want to use arch, install antergos and follow the archwiki instructions.