I have heard that coolers with the GTX 970/980/TitanX will Focus on the M40 likewise. On the list of EVGA HYBRID coolers (water cooling to the GPU, air for that memory) might be fascinating to try. Eliminated the M4000 through the x16 slot (my P400 is used for the OS https://subhashj490rvx3.hamachiwiki.com/user