dear all:
I have a video card, ASUS ENGTX295, it has two GPUs (each has 896MB RAM) in one card.
I want to merge two GPUs into one, but from NVIDIA control panel, I
cannot see any SLI option.
cudaGetDeviceCount() always reports 2 GPUs, and I can only use 800 MB RAM.
How can I merge 2 GPUs into one such that I can use 1.7GB RAM.
As you said, the 295 is two GPUs, not one. There’s no way to make them appear to be a single superGPU in software or even in hardware (they have separate memory busses).
There is indeed 1.6GB of RAM, but it’s in two independent devices.
You have some GTX285 or GTX275 with 2GB RAM, that are worthwile for large datasets, and elsewhere you have to stick with TESLA, but never forget that you wont be able to use the full 4GB and may end-up with only 3GB accessible depending on your usage (and especially if you use Mapped memory).