I don't believe that any Socket 478 motherboard has a PCI-express slot. Only LGA775 has PCI express. Are you trying to use your current processor? What
s your budget? For $150 you can get a decent processor and motherboard, with a PCI express slot.
so i can only buy a motherboard for that much. I never assembled a computer from scratch before so i'm hoping it won't be too complicated. I'll have to buy a new computer casing also.