> What Sonnet Upgrade? Wake from sleep problems? How fast does it feel? > Quiet variable speed fan? > It's the Sonnet 1.2. No wake from sleep problems. Seems quite a bit faster, almost to the point that the stock 450 feels crippled for just about any use. Ripping in Itunes with a firewire cdrw is averaging at 15x-18x. The fan at the base is the Panaflo L, and is, to my ear, not noticeable at all. I did run into a difficulty with the upgrade however; when running the Apple hardware test cd, I was getting a "failed logic board" result. The end result was that I had both a bad 512mb chip of memory and the Sonnet upgrade seemed to be defective. I've since received a new memory chip and a new Sonnet 1.2 and have yet to re-install them (which is why the OE 450 is seeming quite in-adequate right now). The only reason I realized I was having problems was some bizarre system behavior and some corrupting of jpeg files from within iPhoto and Iview Media Pro - not at all good! At first, I kept thinking I had a bad OS install, and tried a complete format and re-install (twice!), and finally I tried the Apple hardware test, and then took it to an Applecare provider (covered till 01/04) who determined it was just fine when the OE 450mhz board was installed. So aside from the defective 1.2 board that I started with (and I hope I won't re-experience the problem), I'd say the upgrade was a great thing as it's allowed for quite a bit multi-tasking that could not be done when the Cube was at 450mhz. Regards, Julian Tracy