Sli not working properly

[s26rech]

I have a 980ti sli configuration and it always worked fine. 1/2 weeks ago almost any game started heavy stuttering due to low gpus usage, in fact the cards always run different usage but never 99% ( 60/70/80/50 etc ), this is very annoying and it also happens in easy games ( rocket league doesn't go above 200 fps and it keeps stuttering ), any help?

 

[smorizio]

post your hardware info. start with mb bios make sure it updated and then make sure the mb has the newest intel or amd chipset drivers.

 

[s26rech]

post your hardware info. start with mb bios make sure it updated and then make sure the mb has the newest intel or amd chipset drivers.

i7 6700k ( stock due to high temps but even clocking it to 4.6ghz makes no effect )
Z170 Pro Gaming
Corsair H100i
WD Black
Samsung 850 Pro Evo
2x4gb Kingston Savage 2133mhz
Sli 980ti g1 gaming
Haf X
W10 ( last build, 1607 I think )

And yes, I got all the newest driver 8 even the bios ( 2003 )

 

[sizzling]

What's your cpu usage and temps while gaming?