I have GA-K8NF-9 non-Ultra model and I must say that Im not pleased at all.
-First of all, the chipset is hot,hot,hot (sometimes over 60 degrees) so that means you'll have to buy some cooler if you want to OC.
-2nd, GA-K8NF-9 is not very impressive for OC (at least im my case it wasn't)
Got myself 3000+ Venice, but i couldn't OC it more then 1.97Ghz cos i can't rise motherboard's freq more than 218.I changed my memory stick just to make sure...but no.........problem is in motherboard alright.....
-Third, this motherboard does not have much manual settings. There is NO MANUAL settings for memory timings at all!
Just bunch of automatic-top-performanse-crapy ones.
My advice is : DON'T BUY IT.
Go and buy some good ABIT model. I hear that some MSI motherboards are quite good.