Well, this idea didn't necessarily take off since these cards
haven't even had schematics leaked for them.
However, I do have 2 cards now, one working in a system, and one dead from a failed overclock attempt (which was why I bought the Circuitwriter pen, and that worked wonders ever since!)
I also have information regarding overclocking these cards. The ones I have were very early in production, pretty much right when the PowerPC 7455 was put out to manufacturers. I have recorded date codes of 0202 and 0206 on my 2 cards respectively. I'll be calling the working card "0202", and the dead card "0206" from now on with the post.
0202 only got to 1.07GHz as did 0206. I attempted to try 1.2 on 0206 again, but that led to possible electrostatic/heat damage from the soldering iron.
I'm going to try saving 0206 again as I am learning to do BGA soldering. I have a couple of XC7455A chips on the way, too.
0202 I am leaving stock with a 66MHz boost in speed.
If anyone has tried or has the guts to try 1.2GHz or 1.07 on a dual 1GHz G4, get the CPU date code. I'll try putting some of this together to determine which ones can go to 1.2 and which ones can't.
Not too much of a speed boost, but at least you won't be dealing with the MDD's potential issues.