[GM] Best Resolution for Lag-Free Games

[TeaBag]

The last time I tried game maker I made everything in high res and it ended up being laggy crap.  This time, I really want to avoid that (and let people with lousy computers play the game I'm making too)  I was thinking I'd make the game 640 x 480 (like rpg maker xp)  but I'd RATHER make it it 800 x 600.  Any insights/preferences?

[Arrow]

Make it 320x240, then make the game force the resolution on the computer to change.

Most sprites are made to work at this size anyway.