According to the Intel specs page
, the E6300 works with a 1066 Mhz FSB. That equates to a 533 Mhz memory speed, with a 266 Mhz base FSB.
If the max you can get from that setup is a 400 Mhz (plus) FSB, then you will never achieve that "light at the end of the tunnel".
The Asus site is not very accessible, but did find some specs elsewhere that note several model lines in that P5QL mobo family. Perhaps all models are not capable of the final FSB needed by the CPU. The 'Pro' and 'Extreme' do have the 1033 Mhz and 1066 Mhz final FSB.
If your memory is capable of the 533 Mhz bus speed, then you should be able to attain your goal. But if the memory is limited to a lower speed, then the chipsets are restricting the FSB so there is a dynamic relation for the memory/CPU bus speeds.
But one caution.. while the CPU core itself may well be capable of more than 3 Ghz working speed, its cache memory may not sustain much higher speeds than rated. Whatever maximum stability speed is achieved, that is the overall rating for each CPU die.
F@H.. to solve mankind's maladies.. in our lifetimes!