2.79 12 Sept version. Brand new branded laptop i7-7820, 32G ram, GTX 1080. Cuda and GPU settings on.
I experience atypical fan trottle yesterday, when learning to rig bendy bones. The scene object, a head mesh is only 5K verts.
Solid display, matcap, no HDRI no dynamic sky. All net browsers and usual resource hungry culprits closed. Temp monitor report, CPU/GPU below 60 degree. Viewport remains responsive enough, but fan kicks in as soon as I enter Edit mode and start adding bones.
The only thing different from my other rigging tests on this 2.79 version, is this 5K head mesh is diligently vertex groups named right after GoB from ZBrush. It has 2 dozen-ish vertex groups prior to skinning. In 2.79 earlier version, I can have multiple constraints on a body rig with no fan/CPU issue, bendy or not (though that mesh involved was a mere 1K vert cartoon proxy type body)
I haven’t heard my fan working so hard, except when installing new BIOs. My fan stays quiet in Daz Studio even with multiple 20K vert multi 4K tex maps heavy-weight mapped characters with multi subD on top!
When I enter Pose mode and start posing, the fan went nuts. Blender viewport can’t deal with 38 bones/ weight maps on a single 5K mesh?
I hesitate to make bug report… since I’m still a Blender noob, barely one month old… I suspect it’s weight maps. But what exactly? Still confuse, is Blender using GPU or CPU for viewport render?