Kirby's epic yarn big slowdowns!

[Shonumi]

Hmm... In that case, since you're bottlenecked by your CPU (your GPU isn't the problem here as you pointed out) the only other options (aside from just ignoring it altogether) would be to OC your CPU even further, or make the upgrade to a Sandy or Ivy Bridge CPU. An i5-3750K at 3.7 GHz would most likely not have any trouble running that part of the game; you wouldn't even need to overclock to reach that speed either.