XPS 700 Targeted at the gaming community, this model featured the Intel Pentium D Extreme processors in speeds up to 3.7 GHz with dual nVidia GeForce 7900 GTX in SLI mode, a 7200RPM SATA hard drive and dual-channel DDR2 RAM. This desktop was advertised as being overclockable but was not. Dell would later offer a free XPS 720 motherboard upgrade program to all XPS 700 and 710 owners so that these machines could be overclocked with the bios. The aluminum case featured a distinctive "leaning" design. The XPS 700 used significantly larger power supplies (750 watt and 1 kilowatt) than the other XPS models to accommodate higher-end video cards and overclocked CPUs. Unlike its forerunners, it used a BTX motherboard, thereby limiting upgradability. It was replaced by the XPS 710 and many customers were offered a free motherboard upgrade to XPS 720 specification following complaints about the system. XPS 710 The formal flagship model of the XPS series that features the new Intel Core 2 Duo and Core 2 Extreme processors, as well as Core 2 Quad processors. Other features include dual nVidia GeForce 7950 GX2 in Quad SLI mode, 7200RPM SATA hard drive, dual-channel DDR2 RAM. The XPS 710 uses significantly larger power supplies than the other XPS models to accommodate higher-end video cards and overclocked CPUs. It was replaced by the XPS 720. XPS 720, XPS 720 H2C Announced on November 24, 2007, the XPS 720 is the same as the XPS 720 H2C, except it does not have the "dual-stage radiator cooling technology." It comes in two versions, the Red Special Edition, which is the same as the Black normal one, they both come with a 1 kW power supply. The H2C edition computer has included a dual-stage radiator cooling technology, and a motherboard capable of overclocking its quad core Intel Core 2 Extreme QX6800. The H2C comes standard with dual Nvidia GeForce 8800GTX cards running in SLI at a price of $6,780. The XPS 720 H2C uses slightly higher quality parts than other XPS classes. At the time it was one of the most powerful and fastest pre-built systems an individual could purchase by a significant margin. XPS 730 H2C The 730 H2C had H2C (a high-performance cooling system) as standard, which was ideal for gaming and overclocking. Its motherboard, the Nvidia nForce 790i Ultra, was capable of overclocking its quad core Intel Core 2 Extreme