When I bought my G4 back in October I immediately started shopping for a G4 CPU upgrade. I actually got to the point of ordering a 1.4GHz kit from OWC, but had to cancel the order when I had some unexpected expenses (long story ). Since then I'd pushed the idea on to the back burner but have saved up some cash. I noticed that Giga Designs recently came out with some new CPU upgrade cards - 1.73GHz or 1.8GHz, single AND dual. I was drooling. However, I noticed that the 1.8 models are 1.42GHz 7447As "tested" at 1.8GHz. That is a HEAVY overclock, the heaviest I've seen on a G4 outside lbodnar's eMac upgrade. The 1.73GHz model is modestly overclocked from 1.6GHz - but it's $50 more than the 1.8 model. This seems a bit confusing - I guess the 1.42s are super cheap nowadays but can they really handle the bump? Mike at xlr8yourmac seems a bit wary of the 1.8 (there is only one review so far). I was hoping to hold out for something around 2GHz, but I'm getting the upgrade itch again, so next paycheck I might get one, although the lack of L3 cache bugs me. Any thoughts from others shopping for CPU upgrades?