The G4 could have a much longer life than anyone expected. Let's see if other developers follow suit. The prices should come down. My tower may live for years to come.

Wow, now a 2GHz Mac mini would be nice. Or how about a 2GHz PowerBook while we wait for a G5 P'Book?

This sounds like the latest revision of the 7447A that is clocked at 1.67GHz in this year's PowetBooks. I'm not surprised that it can run at 2GHz in a desktop configuration. I don't think you'll see a G4 at these speeds offered by Apple until the 90nm 7447 variant is released though.

I have a DP PowerMac G4 ... could I cram two of these in there?

The 7447A does not support Level 3 cache. It seems to me that, at some point, there is a serious law of diminishing returns for this variant of the G4. Without the L3 cache won't this processor be spending some serious time in idle waiting for the slow 100 - 133MHz bus to get data to it? The 7447A, unlike the other variants, sacrifices all L3 in return for a higher clock speed. There is a reason that barefeats did a comparison of different G4 variants in a G4 cube vs the mac mini and came up with L3 cache being absolutely critical for overall performance (http://www.barefeats.com/cubeup.html). Are we falling victim to our own MegaHertz Myth?

A 2.0 ghz processor means nothing without the large 2MB L3 cache on the 1.4 processors. Take a look on XBench, and you won't see any 1.7 ghz processors at the top. It's all the 1.4 ghz Dual processors that lead the way. If Giga Designs could somehow design a 2.0 ghz processor with a 2MB cache -- now THAT would be something to rave about.

Curious if this is possible with a G4 powerbook. Thanks.