Graphics issues with n64 emulator

Ok, so I'm new to emulators so i apologize if this is really obvious. So, i got an snes emulator and it works perfectly with the graphics. I got a n64 emulator yesterday and am having some serious issues with it. I can't even play games such as Pokemon stadium 1-2, donkey kong 64, and banjo tooie. The graphics are just like seriously bugging out. Like you can't do anything or hardly see whats going on? What do i do?

Try different video plugins. Also check the game list in the help section for known issues with graphics.

If you're playing with integrated (on-board) graphics, expect severe graphic glitches.

Sorry but what do u mean "on board"? I'll try downloadin a new plug in but its not the actual rom i have right? or emulator?

On-board means your video adapter is embeeded on your motherboard and thus its performance is generally very poor.