I grew up with a very low end XP machine. 1.5GHz Pentium 4, 256MB PC100 RAM, 64MB GeForce2 MX400. I mainly played older games (from the mid-late 90s), but I still had a fair few "modern" games like Max Payne, Mafia, Vice City, etc, and the framerates on those could be in the low-mid 20s (sometimes even in the high teens). But I put up with it, because my parents wouldn't buy anything better. As a result, I'm very forgiving of low framerates in games, and really don't understand people who say they can't enjoy a game unless it's at 60fps or higher. Spoiled brats.