That's very interesting. Could u be more specific as to how you managed to swap 603 with 740? Was it just a simple soldering? Or did you have to do anything else? I'm quite sure that both Stachu100 and delshay could benefit a lot from your experience.
Maybe the the problem of non-stability was the right choice of memory. Stachu100 mentions a lot about it.
Anyway, that idea of putting 740 into BlizzardPPC or CSPPC is absolutely great!
