A new CUDA programming tool is online at Sourceforge that adapts the algorithms used in the popular memtest86 suite to GPU memory structures.

A memory test utility for NVIDIA GPU memory using well established patterns from memtest86/memtest86+ as well as additional stress tests. The tests are designed to find hardware and soft errors. The code is written in CUDA.

Could be a great diagnostic tool.

via SourceForge.net: CUDA GPU memtest.