Barence writes: Last week, PC Pro issued a challenge to see whose PC could render a 3D graphics benchmark in the fastest time. The competition was won by an entrant with a rather unfair advantage: Intel. The processor giant's superchilled rig is overclocked to nearly 5GHz. As PC Pro explains: "The rig itself uses phase-change cooling: in other words it’s attached to a chuffing great freezer, which I believe is the big box on the right of the photo. That yellow meter with the readout is showing the temperature of its output: yes, that’s minus 40 degrees celcius." Can anyone top Intel's own test rig?