Erm, more details please - '' I bought gigabyte intel 945 motherboard, all i want is a pro editing pc,'' doesnt mean anythign !
what model number is the mother board ?
do you have a budget ?
dont expect too much, because at the moment 945 is down with the ark, and you should have really looked at a 965 or 975 which can accept the new Conroe chips ( core 2 duo )
for editing, CPU and RAM is where its all at. but a decent motherboard can help you get every last drop of powerr out of it if your planning on overclocking !
more info please

Rick