Baking issue with cycles

Hey guys,
So i wanted to bake some muscle textures for my low-poly model.

I went to create a new file with the cube, i made the cube fancy with some editing, then went to bake it.
It successfully baked… looks pretty cool

Went to the human model… proceeded to sculpt out some muscle tones…
I created a new UV image, ensured it was unwrapped. I made the image texture node on the material, unlinked to the rest of the nodes as instructed…

Pressed the bake button… and nothing. Not only did it bake a solid-black texture… But when goto rendered view, it says
CUDA error at cuCtxCreate: launch failed.

So I undid the bake, reload the file, and went to rendered view just to make sure everything can still be shown in rendered view.
Everything can be shown through the rendered view… until I try to bake… then it gives me the CUDA error afterwards.

Can one of you wonderful blenders help me out please?
Thx