I've had my XPS720 for a while now and have been pretty happy with it. For whatever reason I wanted a little more out of it. And Fry's had Q6600s with the G0 stepping for 170$ and I couldn't resist because I read about people pad-modding their CPUs to change the factory 1066mhz fsb to 1333. I figured for 170$ plus the fact I could recover half that on ebay for my E6700 it would be a worth while overlock. Sure enough it took less than 5 minutes to cut a 3 by 3 millimeter piece of electrical tape to block one of the pins in the socket and the chip went in. I ran a few benchmarks and the results were impressive. No heat problems with the stock heat sink either, at idle the chip hums along at 30 degrees. For the folks that want specifics, I used 8.5mil black electrical tape to cut the square to block the pad from the pin in the socket and Arctic Silver 5 thermal paste after cleaning the factory heat sink. Getting that tiny pice of tape to cover the right pin took 4 of the 5 minutes it took to put this all together. I used a sewing needle to adjust it. Here are some pics: My last cpu overclock was a dual slot 1 system with 300mhz celerons running at 450mhz.