Using the exact same settings I only get around 2.4kh/s. Any idea why?
Which card exactly are you using and which driver version? I am still on 335.23. Also, I am no longer using any increased TDP bios as it doesn't really help. My overclocks nowadays are dependent on which of my cards exactly. Some of them I can push to +170 core +650 mem. I have been getting around 3.3-3.5kh/s on YAC these days with the occasional dip down to ~2.5kh/s.