I have an HP Pavilion a6604f desktop. I recently bought Starcraft II and I want to play it on Ultra settings. To do this, I bought a 650W PSU, and a HD5770 video card. The only problem is my outdated Athlon 64 X2 4000+ processor. So I did some bargain hunting, and the Phenom IIX2BE really caught my eye. 3.2Ghz and L3 cache, for 80 dollars. I don't have the money for a new build at the moment, which is why I must do this ridiculous OEM upgrade. My mobo is a M2N68-LA (Narra3), and according to the HP website it allows AM2+ sockets. Rather than waste 80 dollars and precious time, I would like to know if this processor (Phenom II x2BE @ 3.2Ghz) is compatible with the M2N68-LA (Narra3). I really doubt that I can make this upgrade since OEM mobos suck, but it doesn't hurt to ask.
Your hp board doesn't support phenom II's or am3 cpus. I wouldn't put any money into it. When the board fails, then you can do a proper upgrade with a new board/cpu/ram and windows 7. You'll need a new windows operating system when changing to a non hp board, unless you've done so already. Or you can try selling your old board/cpu/ram on craigslist or ebay, and use the proceeds on an upgrade.
I upgraded my HP Pavilion 6547 (which uses the Narra3 mobo - orginally an Athlon X2 5xxx) with the new Phenom II X4 945 95W and it works fine. The am3 chips are backward compatible with Am2+, you just have to stay within the voltage requirements.
Runs fine -- I had to upgrade a bunch of other components to take advantage of the new cpu's power, but thats what upgrades are for...