the vrm's are cooled by the reference style fan in there shrouds
[seahawk]
''The baseplate is used to sink heat from the VRAM and VRM, which then sees dissipation from the blower fan. The baseplate isn't finned, but GDDR5X doesn't generate a ton of heat and the card's OC potential is fairly limited, so the baseplate + blower solution is sufficient. We'll show this later.''
[evga]
Cooling is handled by the same Asetek 4.5 Gen liquid cooler with the protruded copper coldplate, but now uses some more unique cooling methods to dissipate heat from VRAM. EVGA has fitted a backswept blade design to its VRM for the VRM cooling, but the VRAM is indirectly cooled by the GPU coldplate. Still, enough of the VRAM copper sink is exposed to post benefit from increasing the VRM fan speed
http://www.gamersnexus.net/hwreviews/2582-evga-gtx-1080-ftw-hybrid-review-vs-sea-hawk-x?showall=1
up in till that revision in the corsair/msi card the seahawk used a h55 ''CPU'' cooler [seen in the reviews of it ] the evga is for a GPU
in the end they all got there pro's and con's thing is evga was first to do this and the rest try to copy .
with each of them the thing I see now after the fact is if the pumps go bad or something with there coolers you have to RMA the whole card and then you may get back a referb or a card that may not be as good [card wise ] like some guys having to rma 2 or 3 times to got a decent card back [evga and corsair / msi ]
see if you get the air cooled card and the pump fails or something not to do with the card its self you just remove the pump/radiator part and just send it in and put the air cooler back on your ''good'' card and keep using it intill you get the replacement pump back with out down time or getting back a worse preforming card that you giot to do another rma over and so on
look over corsdair/msi forums on that and also the evga forums under the 900 series of guys reporting these things with a factory seahawk or hybrid card .
of course that's if you get bad luck I guess if you get that luck of the draw card it wil llast at least the 3 years of there warrantee time [??]
like I say I got a 980ti hybrid and I like it a lot so far [knock on wood] its been a better card then I even expected from it good out of the box boost clocks never seen over 48c [and got that when looking for the best place to mount the radiator now like 45c is the highest I see]
no pump noise quite fan , quitter then my last 2 or 3 air cards for sure when full load heating things up , pretty happy with mine , but that's all I can speak for is what my experience has been with the 980ti hybrid I got . I'm sure there maybe better , and I do know theres worse .
also I cant say what may have changed over the 900 series to the 10 series , you see from that vid I linked corsair/ msi made a cold plate change on theres to do something , evga changed with that copper thing on there cold plate not on a 900 series ???
I think what it boils down to is even more luck of the draw comes in to play on how much of a well cooled solid card you end up with like everything else .
either way corsair/msi or evga you roll the dice , you buy , you try , and hope it don't make you cry .. cause theres all ways that slight chance you could get the lemon with any brand
''Also, are there any tutorials for installing the evga hybrid waterblock for the evga gtx 1080ti sc? ''
don't know never loked to see ?? that gamersnexus does a lot of them vids ? you can download the manual of the hybrid coolers from evga and review them as well on instillation
loks to be a few utube vid on it like this
https://www.youtube.com/watch?v=wRHF3J4Yz4M
for the 10 series cant be too much difference if any between any of them
some user experience post on that
https://www.reddit.com/r/nvidia/comments/64r0z2/1080_ti_hybrid_install_because_evga_instructions/