Comment Re:GPUs need more RAM for us (Score 1) 295
The newest Nvidia cards (compute capability 1.3) have double support. Memory is still a problem, though. The cards have a 32-bit address space with no paging/virtual memory, so I don't think they can go over 4GB, and in practice they aren't even up to that limit yet.
They are very fast if you can deal with the limitations, though. At my company we're seeing 2-3x speedup on various image processing tasks with a modest amount of optimization. And that's compared to highly-tuned code running on quad-core CPUs.