When I try to change my Cycles Compute Device to CUDA in user preferences I continue to get CUDA rendering errors. This happens in my "rendered" viewport and when I try to render an image.
The exact error is:
Mem: 4050.16m / Cancel / CUDA error: Out of memory in cuArraCreat(&handle, &desc), line 783
Processor: Intel(R) Core(TM) i7-6900K CPU @ 3.20GHz Graphics cards: 2x NVIDIA GeForce GTX 980 Ti Memory: 64.0 GB (63.8 GB usable) Windows 10 Pro System Type: 64-bit operating system, x64-based processor