Ubuntu 18.04 Will Not Run w/o nomodeset

So here's the situation.

I purchased my computer parts, assembled them and booted up as far as the BIOS. However, the splash screen would display with graphical errors so I followed the instructions in this link (The computer parts are here as well):

LINK

I can run Ubuntu w/ nomodeset enabled but I'd rather not for the following reasons:

• The TV appears as an unknown display
• I'm stuck at a lower resolution than desired
• HDA Nvidia sound doesn't register

I partially solved the lower resolution by typing in some commands in the terminal but it only gets me to 1024x768. Furthermore, when I choose 768p, I start having flickering red pixels in dark portions of the screen.

Looking at the video in the link previously posted, is there any way to run Ubuntu w/o nomodeset? Thank you for reading and any help!