Asus P8P67 Deluxe very wierd behavior

I had my mobo for 1 week now. I've updated the bios to latest, set power on by ps/2 KB is set. But. After that being set. Powering the pc on won't work. My psu is able to supply 3A on +5vsb rail.

Next observation. After shutting down win7. Pc seems to be shutted down. But cpu fan and pwmfans still spins at very low speed even if i try to stop it by hand. It still spins after i've removed my hand. And. Numlock's led light is lit and cannot change state thru numlock button. And That's the only state i've managed to make my power on by ps/2 work. The only thing i have to do to make the fans stop spinning is to unplug totally the tower. After unplug and replug. Power on by ps/2 don't work again. Is it a problem or it's just a normal behavior of p8p67? My psu is corsair tx650w. And that psu makes my old mobo to power on by ps/2 without problems.

TIA

How do I set my windows to power on by kb? I don't think it has that option to power the system from total shut off

Hmm. I've disabled power on by kb and shutdown seams to be fine now.

Yes. Power on by kb is essential to me since my tower is placed in a high place and the power buttons are on the other side which is quite difficult to press.

Can't make my pc power on by kb if the machine come from total shutoff. And it is set on bios.

My old asus p5g41t-m lx3 does the job smoothly. So i'm puzzled why can't my p67 do the same job

I think i could make one myself too