And if it does work, does it then allow the machine to run at the higher speed? Seems like it maybe ought to, but it also seems like the logic board in the 520 might not be capable of 540 speeds. Depends how cheaply they made the things, really.
My PPC card has an issue though. When its cold/first turned on, its horribly unstable. Once it warms up a bit, its fine. I have two 520/540 machines. ones horrible condition, other is fine. Both do the same thing with the PPC card.
Yeah, the one I have is the first one I've ever seen for sale anywhere, had to order it from Japan directly. I really enjoy being able to run a full 040, only one they ever made for their portable line.