Peter,
1 )
"This is such a rumor, starting I guess, here right now, by you."
Your guess is incorrect. I do not have a time machine and did not use it to go back in time to post all the other threads on this topic. Also, please be careful when insulting people on the Discussion Forums. The Apple moderators do not appreciate it any more than the users who come here looking for pertinent information and intelligent discourse.
2 )
"I haven't read this anywhere"
No one is responsible for educating you nor doing reading and research for you other than you yourself. And while you have not compensated anyone for doing so, I have taken the time to compile a list of threads on this topic in the hopes of providing other people here, including yourself I suppose, with some potentially valuable and relevant information. May it serve you well and you're welcome (though you may still wish to apologize at some point, soon).
Topic: Clocking it just right!
http://discussions.apple.com/thread.jspa?threadID=566157
July 18, 2006
Topic: 15" MBP too hot to handle, gpu artifacting in 3d apps
http://discussions.apple.com/thread.jspa?threadID=562388
July 16, 2006
Topic: Video Card Question
http://discussions.apple.com/thread.jspa?threadID=545397
July 3, 2006
3 ) Also, please note the word 'Apparently' in the previous post. If you are unsure of its definition, it can be found here:
http://encarta.msn.com/dictionary_/apparently.html
To quote: "according to what seems to be the case but may not actually be so". It's use was intentional indicating precisely that point and level of uncertainty. When you state that, "video works just as good now as before my MLB replacement" one does wonder by what objective criteria you are measuring said performance. Have you collected before and after data in relation to clockspeeds and benchmark results? If so, I'm sure we would all be very interested and appreciative if you would share it with the rest us and add to this body of information for everyone's mutual benefit as others have intended to do.
Thanks, and wishing you all the best, even in light of your response.