I'm going to be upgrading my cpu from amd athlon LE-1640 single core processor to an amd athlon II X2 240 dual core processor. It is the only thing I can afford for a while and if I didn't get this processor now I probably would never have gotten it. I've played sims 3 before with the single core but it was very laggy and nasty

. The settings even on very low were laggy. But the settings default to high with the single core processor due to the fact my video card bumps up the settings. Since I upgraded to this dual core processor. (haven't gotten it in the mail yet.) How would the sims 3 run? Would the settings go higher (I play on high already not max settings.) What would the fps be?
specs
AMD Athlon II X2 240 2.8 GHZ (Dual core)
RADEON HD 6570
4 GB RAM
WINDOWS VISTA
How would the sims 3 run? what fps and settings?
Also what fps would skyrim and settings and fps would it run with? I Play high on skyrim now but its really laggy because I have and AMD athlon LE-1640. which is single core.