Bios compatible with CPU?

I've been going about upgrading a Lenovo ThinkCentre M83 and i have plans of installing either an i7 4770 or 4790. The only issue is due to being an OEM board, support lists for CPU's aren't really available. The computer was offered with a i7-4770 so I assume it supports that CPU, but ive also found a site showing someone using a i7-4790 with the same board(i believe). Just looking for another opinion. http://hwbot.org/xtu/share/163595

Lenovo ThinkCentre M83 Mini
Mobo model: Sharkbay NOK
Q85 Chipset
Bios: FBKTCCAUS