The Record: 5,112 MHz with a Core 2 Quad Q6600 (2.4 GHz). That frequency was validated, but the team actually managed to attain 5,124 MHz (not validated).
In addition to the DFI motherboard and the Intel processor, the configuration had one 1 GB DIMM of DDR2 memory and a Geforce 8800 GTS 512 MB graphics card.
Update: As has been observed, the processor used in this test was a Core 2 Quad Q6600, with two of the cores disabled by the team in France. This configuration was used in order to hit the highest frequencies possible, rather than to yield a fast and usable system.
Please keep an eye out for more current overclocking coverage as we get ramp up our own international overclocking competition!