Believe it or not, 200 MHz was OUT OF THE BOX. I still think that it'll go higher stable. I ran Unreal for >1 hour at 1280x1024 without a hiccup. I also set the AGP port to 1/1 on my 504 (112 Busspeed), because I haven't figured out how to go over 200 on the V3 overclocking utility from voodooextreme yet.
I also have tried a V3 3000 (Siemens memory) on the same machine, and it'll only do 175 MHz stable.
Check de thread voor meer info.