Sorry.. negative again!
See... i had local cabinet before i bought my CM690. In that cabinet the motherboard didn't fit! So i had to keep my PC open. Soon enough, it became an ash-try for my cigarettes, dustbin for my potato chips packet and a house of worms and dust! So when i fitted everything into my CM690 i was able to remove all the dust, except a thick layer of oil and dust which is coating my motherboard. It has stuck to my mobo like glue so i have to remove it by some sort of force! Surprisingly everything works no performance degradation whatsoever! But i just don't like the thick layer!