What would you recommend for rendering on GPU (iray, V-Ray RT, VRED) and doing some VR; two GTX 970 or one GTX980 Ti card? I can get these setups for roughly the same price.
970: 2x1664 = 3328
970: 224 GB/sec
980Ti: 336.5 GB/sec
Texture Fill Rate
970: 109 GigaTexels/sec
980Ti: 176 GigaTexels/sec
I know that the memory in two 970 does not add up to 8gb in total, so two 970 will give me less VRAM. But what about the total number of CUDA cores compared to the lower amount of VRAM and lower memory bandwidth?
My motherboard has 3x PCI Express 2.0 x16 slots with support for 3-way SLI. I also have my old GTX 590, that I was thinking of keeping for Windows to work with.