I've been reading reviews, and all of them claim this isn't too great for gamers. For example-
"Cons: THIS IS NOT FOR GAMERS! I do a lot of gaming myself as well, but I do not know of a single game that takes advantage of dual-core. If anything, it will only cause problems. While playing Need for Speed: Most Wanted, I HAD to set the affinity to only one core, otherwise it would not play. Other games (CS:Source, Quake 4), I noticed a significant framerate increase when affinity was set to only one core."