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The Titan system is a 200-cabinet Cray XK7 supercomputer.
Titan contains 299,008 CPU cores and 18,688 GPUs to guide simulations and allow its Kepler GPUs to do the hard work. Titan will contain 700 terabytes of memory.
Titan will take up the same space as its predecessor, Jaguar and is expected to be about ten times more powerful. Titan will also draw abou the same amount of power as Jaguar.
Titan will be used to study climate change, nuclear energy, radiation transport, combustion, membrane fusion, nanoscale materials and more.
Nvidia Tesla GPUs are massively parallel accelerators based on the Nvidia Cuda parallel computing platform promises to deliver a "dramatically higher application acceleration for a range of scientific and commercial applications than a CPU-only approach."