I've never got overclocking to work properly or give any recognisable speed increase - my BIOS supports 3 different types of o/c at various speeds. Pound for pound not worth attempting IMHO.
I guess you wrote this in the wrong topic. This is for the last race not today's race. Besides that, it´s better for you to e-mail Tessu, the Pool Manager about this, otherwise they might not see this, and you´ll get a DNSH...