The customer support told me that there were two versions of the K8NF-9 motherboard. My board was technically suppose to support dual core, but there were problems with it so a newer version of the K8NF-9 came out to replace mine like months apart. I bought mine off of Newegg long ago and it said dual core support, but I bought a cheaper single core instead. At the time, dual core was EXPENSIVE!!!
The problem was pretty big because even a flash BIOS couldn't fix the problem. Oh well. I wasn't aware of this problem at all since I had no interest on bulding a dual core system in the beginning. This was the time when dual core was in the news and hasn't even come out yet until months later. Just the thought of my motherboard "supposedly" supports dual core was an incentive.
The PC is running great regardless, lol. At least the extra RAM makes an impact, but I'm on XP again
. Not as much of a resource hog as VIsta was, lol.