I tried that as well. improved my hashrate by 10-20 h/s but still having an acceptance rate problem.
Could it be my drivers? Other than that I have tried all settings and cant get the acceptance rate to 100. it just sits around 77%
its possible that its the drivers but could be a couple other factors. have you modded your vbios? if so, try adjusting the straps. if not, perhaps its the stratum, try a different pool.