well, PM'ing "F*ck you @ssh0le" and barking back is always a welcome response, especially since you googled it *After* you posted..
it just brings me back to my first point: SEARCH BEFORE YOU POST!!!
every possible aspect ofunlocking a X1900GT (except for hard-modding it) has been tried, and had no effect. you got a porche but want a ferrari, because 2 others got it.
face the facts: the X1900GT Will NEVER have 16 pipes, and I'll gladly swallow a raw egg on video and post it onyoutube if someone can hardmod the X1900GT to 16 pipes (must be completable for anyone who atleast has the skills to perform a voltmod \ knows how to solder) (I'm serious, but I want WELL documented proof if you manage to do it)
sorry if I came on to strongpreviously, but the 20 last pages of the unlock thread where noobs who didnt read\searced shait and almost demanded that we magically transform their bios so they can unlock 4 extra pipes that might not even be there, or maybe laser-cutted.
the cores that could be unlocked where engineering sample cores... the consumer market ones are neither.. coincidence??
Edit: I have flashed both my gt's (sapphire and club3d) to xt 256 and none worked