I'm considering buying the higher model of the 21.5" iMac and one of the main reasons I want to buy this computer is because I want a better performance when playing software games like The Sims. There are options to add on additional hardware and I'm just wondering if, to increase speed so games won't have the "stop and go" effect, should I increase my processing speed to 2.8 GHz Intel Core i7 or if I should increase my RAM to 8GB. Any suggestions?

I'm considering buying the higher model of the 21.5" iMac and one of the main reasons I want to buy this computer is because I want a better performance when playing software games like The Sims. There are options to add on additional hardware and I'm just wondering if, to increase speed so games won't have the "stop and go" effect, should I increase my processing speed to 2.8 GHz Intel Core i7 or if I should increase my RAM to 8GB. Any suggestions?

The processor would be the most important aspect of how a game runs, i7 is overkill for the Sims 3 but if that floats your boat go for it.

As for actually increasing the game's performance, you can go inside the settings while playing the game and lower pretty much everything possible (shading, details, etc.). Only lower resolution if you fancy sacrificing viewing space for performance.

Good luck!

You must practice daily 3/4hour.