Again for benching try and use the 125 strap with a BCLK of around 129 or 130, this overclocks the PCI-E slot as well and on some of the benchmarks works quite well.
unfortunately my board does not like overclocking on the bclk at all, i cant even get it to 103 without crashing, my overclock is purely multiplyer atm, hench the reason im only at 4.3, think i might have to get a new board maybe.