I don't test auto but I am very happy with over 433mhz core and over 236mhz mem stable overclocks on my M6807. The best overclocks I ever got from any of my desktop vid cards. Memory OC is not that impressive but core more than makes up for it.
Tests are working fine for me, but I do get some weird error message at first when the 3d view pops up, but it doesn't seem to affect anything. I auto detected core and memory and am now happily running at 447 / 243.