Well, as Dolphin's emulation tends to get more accurate over time, I think newer versions are kinda more demanding than older ones. Your GPU is fine for going up to 4x internal resolution, so you should be alright with that, and maybe lower IRs with some AA turned on.
As for your CPU, probably won't get full-speed in a number of games, specifically the SMG games, and others that require LLE. I think it'll do fair on games that aren't known to be demanding. A couple that I find run really well on lower-end are Sonic Adventure 2 : Battle and Time Splitters 2. I think you're kinda above average (cause I've seen and played on worse) but not there in the high end, though that's just my opinion, not fact. Don't know what else to say unless you have any specific games in mind.
As for your CPU, probably won't get full-speed in a number of games, specifically the SMG games, and others that require LLE. I think it'll do fair on games that aren't known to be demanding. A couple that I find run really well on lower-end are Sonic Adventure 2 : Battle and Time Splitters 2. I think you're kinda above average (cause I've seen and played on worse) but not there in the high end, though that's just my opinion, not fact. Don't know what else to say unless you have any specific games in mind.