well....not entirely the 3850 256MB version clocked at 668mhz stock...from what Ive read serveral places and I believe someone stated in this thread is hard voltage is @ 1.29v NOT 1.33v
I think that is where the 512MB higher stock clocked cards differ...they come hard voltage @ 1.33v just like the HD3870
I will work on that bios for you when I get home again for some time lol...