Upgrade of GPU accelerators on a Cray XK6 from NVIDIA Fermi to Kepler at CSCS

In October CSCS upgraded the accelerators of the “Tödi” system from NVIDIA Fermi X2090 (Cray XK6) to Kepler K20X (Cray XK7). Have a look at how Cray staff replaced the old graphical processing units with the new ones.

Named after Tödi in the west part of the Glarus Alps, elevation 3614m. Tödi has 272 nodes, each with 16-core AMD Opteron CPU, 32 GB DDR3 memory and one NVIDIA Tesla K20X GPU with 6 GB of GDDR5 memory for a total of 4352 cores and 272 GPUs.