Fraps and 8-core CPU

So I was thinking about starting a Youtube channel for Minecraft and some other steam games. I just bought an AMD FX 8320e (non-overclocked, I'm going to buy a new cooler and then I'm setting it to ~4.2 GHZ) and I'm wondering if its better to somehow assign certain cores to the game and Fraps for better recording. I only lose ~5% of my frames, but hey 5% is 5%. Does someone know if It is better? Thanks!