Welcome to the forums.
There's no Clear CMOS jumper, only the button on that board..You can also clear CMOS by turning off/unplugging the PSU and removing the CMOS battery as described
here in the second method..There's no jumpers for the slots.
Virtually everything I'm seeing about that board from numerous reviews (and the EVGA manual) shows PCI slot,
not PCIE slot, as being the default
Init Display First setting in the BIOS PnP/PCI Configuration menu, which doesn't make a lot of sense to me, but it is what it is..And it may not auto-switch from PCI to PCIE if a PCIE card is detected because Auto doesn't seem to be an option, it's either PCI or PCIE..You may need to snag a el cheapo PCI (not a PCIEx) graphics card to get video to work and make the change to
PCIEx as the
Init Display First so you can use the top PCIE slot..That board's a little before my time and I never had one (790i FTW was my first EVGA board), so this is my best, and probably correct, guess..Good luck.