Sia01, Hi I got the same board and I've got e6550 core 2 duo CPU the max on the box is 1600MHZ OCed and I managed a little over this and that was it the Hard Disk wouldn't boot but you could see if you could get yours higher and memory set to 800MHz at 2.2v was OCed as well at 998MHz. I used PC2-6400 memory but you could use PC2-8500 1066mhZ RAM.
My E6550 has FSB of 1333MHz to start with but if you have 1066MHz to start with you could probably push the core speed up alot higher also depends on your max multipiers to mine only goes to 7x max yours is up to 9+ times you should get good Overclock but remember don't use voltage unless your OC is at max because this just stabilizes your max Overclock. Hope this helps a little.