The beta bios are great for advanced settings and overclocking. I couldnt do anything with the stock 10/15 but I'm at 10x240 with the 1/31. It also adds fixed AGP latency which will help with any unusually low 3D mark scores. Also, there's the CPC option (which is a staple for a lot of people in their overclocks). Make sure you stay away from the ALPHA bios's now. They've been known to kill a board or two. With the 12/31-1/31 you cant go wrong; some like the 12/18, too!