During the IDF, a 4.0 GHz phase cooled Skulltrail system was demonstrated.
Skulltrail has a front side bus rate of 400 MHz (1600 MHz QDR), and was demonstrated with two 45 nanometer High-K processors running at 3.2 GHz. Intel demonstrated Skulltrail at the Fall 2007 Intel Developer Forum in San Francisco, USA, and at the 2008 Consumer Electronics Show in Las Vegas. The HP Firebird 803 also supported SLI on one (proprietary, MXM) motherboard at the time, but the drivers were special and only available for Firebird hardware. Owners of Skulltrail systems can also make use of up to four ATI graphics cards using ATI CrossFireX technology, which made SkullTrail the only platform (other than Intel X58 and P55 Chipset) to support both SLI and CrossFire with public drivers at the time of release. This gives a total of four graphics processors.
The implementation of SLI supports Quad SLI technology, which is achieved through the use of two dual-GPU graphics cards from NVIDIA, including the GeForce 9800 GX2. It achieves this by including two NVIDIA nForce 100 PCIe 1.1 switch (two x16 to one x16) chips. Skulltrail was one of the first platforms to support SLI on chipsets not designed by Nvidia. The platform supports two Core 2 Extreme QX9775 processors (commonly mistaken for the Core 2 Extreme QX9770, which is the LGA775 counterpart), which operate at 3.2 GHz. Therefore, Skulltrail can operate eight processing cores on one system. The primary difference between Skulltrail and Intel's current and past enthusiast chipsets is a dual CPU socket design that allows two processors to operate on the same motherboard. It is based on the company's 5400 "Seaburg" workstation chipset. Intel's Skulltrail is an enthusiast gaming platform that was released on February 19, 2008.
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