If you haven't got any component get PCIe. Since no overclock, look at Chaintech, or Gigabyte. Chaintech if you want to go as cheap as possible at the cost of features. Gigabyte if you want features and are less price sensative. I've also heard great things about Epox for people who don't OC, but never used them myself. Also stick with Nvidia chipsets (NF4 4x or Ultra)