After doing some math, I find that only the bottom of that chart provides an improvement, and not a 4x multiplier but a 3.5x (2 to 7 = 1 to 3.5.. 1*100=100, 3.5*100=350Mhz).
I am confused, however, as to why the mod worked for diodenmann.
I'm an electronics noob, as I've said, so.. from what I see, BF0 and BF1 need to be high, so where do I pull the voltage from, and what voltage do I use? Do I just bridge BF0 and BF1? *confused*
Is it possible that it's because I'm using Super Socket 7 instead of normal Socket 7?
Edit: I did some research on the datasheet for MMX too, and found that BF0 is internally pulled down while BF1 is internally pulled up, this means (if I'm not being an idiot) that bridging them should work.