OK, I'm a 10 year+ user and about to upgrade GPU. Having tested my previous builds I know the following:
the CPU can bottleneck the GPU rendering at some point If I Overclock my CPU my gtx970s gets a slight boost and if I underclock it the GPUs dont even throttle to maximum frequency.
I know each gpu needs a single thread while rendering, at least that process is single threaded.
However I have no idea what the CPU does exactly and how much a certain GPU power is bottlenecked by a certain CPU power. It would be nice to have a study that relates CPUs to GPU power, at least in terms of modern CPU frequency and teraflops.
Anyone done something similar or thinking about it?