Update 10 a.m. Sept. 30: The upgrades have been completed.
Starting September 24, the GPUs in the Caldera cluster will be upgraded from NVIDIA M2070Q to NVIDIA K20X accelerators over the following week. The Caldera nodes will be removed from service four at a time and returned to service with upgraded GPUs.
We expect that most users will not be affected by the mix of old and new GPUs during this period. Any user who needs to work with a homogeneous set of Caldera nodes or needs to know the GPU model on the nodes should contact firstname.lastname@example.org, and we will provide the current GPU status on the cluster.
Compared to the M2070Q, the K20X adapters are based on NVIDIA's newer Kepler architecture and, with six times as many CUDA cores and 70% more memory bandwidth, offer substantially improved performance over the current Fermi-based cards.