you'll get the best info from the reviews anandtech has done. dfi ultra-d performs as well as sli-dr, but without full sli. I've heard there's a mod for sli on that board. oc features are beautiful for dfi of course! as far as I've read, the a8n-sli is pretty good. definitely read the review. anandtech as always has the most complete reviews. it includes (i think) a comparison in performance to the asus mobo. stock spds are good, but dfi really kicks ass ocing. they got it to 318 mhz fsb. all nforce4 dfi's have the same performance divided by extra features