Moin (hi). I have the same problem as OP.
Since the 1.8 update KSP uses ~11 of vram and crashes a lot. Before the update I was able to use a lot of mods while ksp needed less than 8gb of vram, but a little bit more of the normal RAM.
System is W10, i3770k @4,1GHz, GTX Titan X 12gb vram and 16gb of normal RAM. The KSP folder is 10gb big.
Until now I always suspected the gpu to be broken, but that seems unlikely now.
Any ideas what changed the utilization of the gpu so dramatically? Maybe DirectX11 ?
Since I don’t think it’s fixable for me because the problem is probably unity I am just curious if somebody has a little bit of insight on the topic.
Especially since upgrading vram is way harder than normal RAM.
Thanks and wishing a good start into the new week.