NVIDIA Tesla C870

NVIDIA Tesla C870 is a Graphics Processor Unit (GPU) designed for high performance computing (HPC) solutions. It brings supercomputing power to any workstation or server and to standard, CPU-based server clusters.

Key elements include:
massively multi-threaded architecture with a 128-processor computing core
A C-language development environment for the GPU (called CUDA)
A suite of developer tools (C-compiler, debugger, performance profiler, optimized libraries)
Seamlessly fits into existing HPC environments

The CUDA programming guide is a good place to start. You can get it @ http://developer.nvidia.com/object/cuda.html

Then download the SDK. The sample code are a great learning resource.Also go through the UIUC course on parallel programming with special focus on CUDA @ http://courses.ece.uiuc.edu/ece498/al1/Syllabus.html

The SDK indicates simple ways to integrate C++ and CUDA