Nouveau-Maxwell

Don't do this if you don't understand what you are doing. Without a mounted fan on the card connected to the motherboard or water-cooling your 980ti will be very very hot!

In

   linux/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

At the section

   nv120_chipset = {
       .name = "GM200",

[..]

Under

       .bus = gf100_bus_new,

Add

       .clk = gk104_clk_new,

Replace

       .pmu = gm200_pmu_new,

With

       .pmu = gm107_pmu_new,

.. recompile the kernel (that's out of the scope of this document)

in /lib/modprobe.d/ or /etc/modprobe.d/ put this in the nouv.conf file:

   options nouveau config=NvClkMode=13,NvMemExec=1

I've tried before with NvClkMode=15 and NvBoost=2 but that failed on my 980ti with crashes.