nelza has been acheived for the 4.1Ghz from his P4 2.4Ghz
You can ask his how he did that,but i think you also need a good ram to pair with the mobo to o/c. Cosair value RAM or high performance RAM are you using?And another thing is the Asus P800-x has a low vDimm and max out at 2.685v so this factor will be limitting you go o/c at max with your processor.