7457s are supposedly cooler than all the previous chips. All the posts/forums/discussions I've read mention that coma issues are now solved. Plus, PL's now @ 1.4Ghz and I guess this is the fastest chip in the upgrade market for cubes right now. If I only had the money, I'd choose PL... definitely. Just my 0,02 eur :) LM >>> riba at hi.hinet.hr - 2004/04/27 10:54 AM >>> Well, if you add the Cube kit the price is about the same between Sonnet and Giga...and Giga offers 50 MHz more. Sonnet is longer on the market though, and I have heard very few problem reports regarding their CPU Cube upgrades. They used to be the most expensive, but now they are almost the cheapest option. About the 7475 - if it works, I don't really care what's under the hood. A real Mac user attitude :)