Going home for the weekend, playing TF2 on my old aging computer was a problem. Luckily, I found ways to make the game run relatively smoothly on this old Radeon 9200 graphics card. (Actually this doesn't really do a lot to improve framerates but it looked pretty cool).
Also having performance issues? Not a problem! Simply type mat_showlowresimage 1 and r_rootlod 5 into the console. r_rootlod 5 requires sv_cheats on, but you can get around that by turning it on while in developer commentary first, then connecting to any game.
Also I know the Wii doesn't really have graphics this bad IT WAS A JOKE