LOL 478 socket is a pin type only
Manufacturer fools @ times
for 478 model theres Intel D865GBF with onboard Intel Xtreme GPU 2 ..plus an add on slot for AGP cards
then ASUS P4R800-V Deluxe which has a onboard GPU
*in.asus.com/products.aspx?l1=3&l2=12&l3=28&model=168&modelmenu=2
then ASUS P4R800-VM
this has better onboard GPU compared to deluxe
*in.asus.com/products.aspx?l1=3&l2=12&l3=28&model=169&modelmenu=2
then ASUS P4C800 featuring on 875 chipset which is also a good option..
All of this mobo are bound to be below 3k, @ max 3.5k