To get higher you need to get off the 1:1, also better to have 1Gb dimms (max of 2GB) up the FSB term will make you be able to hopefully get higher... I had issues to get the quad stable at 4.5 (9 x 500) with 500FSB and 1000Mhz on the rams ,with 1200mhz ram speed it was easier to do... The GB boards have got the A3 rev of the NB and the board pushes way more volts... for 24/7 I prefer the Asus board as I got the same clockspeed with way less NB and FSB term voltage... for benching the Gb might be better... but does that NB get scorching hot...