GRID K1 and K2 are targeted at quite different users/use cases. While GRID K2 focuses on ultimate graphics performance for the most demanding users runnging 2D&3D professional applications, GRID K1 provides the best user scalability at the entry level.
GRID K2 is equipped with two high-end Kepler GPUs with each 1526 CUDA cores and 4GB FB per GPU. The performance is comparable to two Quadro K5000s.
In contrast, GRID K1 has 4 entry-level Kepler GPUs with each 192 CUDA cores, but a combined 16GB of FB per board. In combination with our GRID vGPU technology this allows to provide a virtual GPU to up to 32 users per board. Typical servers contain 2 GRID K1 boards which equates to up to 64 users per server.
GRID K1 - ultimate user scalability
GRID K2 - ultimate performance