XK7 (Titan) Node Description
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Each Titan compute node contains (1) AMD Opteron 6274 (Interlagos) CPU and (1) NVIDIA Tesla K20X (Kepler) GPU connected through a PCI express 2.0 interface. Each CPU is connected to a Cray Gemini interconnect through a hypertransport 3 interface. The CPU has access to 32 gigabytes of DDR3 memory while the GPU has access to 6 GB of GDDR5 memory.
This configuration is shown graphically below.