I am thinking about switching my HTPC from a Celeron 2.8 ghz to a Athlon 64 3500+ in my HTPC. I know I am going to have to replace the Mini ATX board and replace the AGP card (Geforce 6200) with a PCI express Geforce 6600. Main reason I want to do this is the 2.8 celeron runs way too hot in the small case which causes the power supply and other fans to speed up making it too loud (my current gaming pc makes less noise) and during some HD content playback it pauses a little bit even with 1 gig of Ram. I will probably overclock the Athlon 64 to 2400 mhz, will this be enough power to playback everything all formats smoothly, I never had issues with the 2.8ghz besides WMA HD content (mainly the HDnet discovery launch wma file)? Not to mention I know I can run the 3500+ fast and quiet, I am using it in this pc right now and it makes barely any noise even under heavy load.