User blog comment:JAlbor/Dishonored PC System Requirements/@comment-4043223-20120918192850/@comment-4564231-20120920163223

Readyboost increases RAM; Gamebooster optimizes your PC to make the most of what's available. It can't increase processing power, but it can make more efficient use of what you've got. You should get a noticeable boost in framerate though. I'd recommend trying one of the games you already have with and without these and comparing framerates (GameBooster has a built in fps counter even when you're not in boost mode).