I powering pump trough psu, to the MB its connected just for regulation. right now i have it on normal mode, in full mode its around 4000. Iam not sure about which piece of protective plastic you talking about, can you tell me more about it? I already few times dismanteled expanzion and pump to clean it but i didnt see any plastic that looks like it should be removed.
Disconnect the PWM to the M/B so the pump will run flat out, constant pump varying is not a good idea IMO as it allows temperature build up that once a high is reached cannot be resolved. IMO PWM control is becoming brand specific to cause premature pump failure to sell more pumps, the argument of saving electricity on 12v DC is a freaking joke! IMO
The plastic referenced is the plastic on the face of the water block that is to be removed before the water block is installed.
IMO, if you intend going the overclock route on your 8700K, you are a prime candidate for a dual loop setup to isolate the CPUs overclock temperature from the 1080Ti temperature with it not even overclocked is very toasty.
The 1080Ti will keep your loop temperature hot enough to cause your CPUs overclock to reach unstable territory, then blue screen crash Bingo Bango!
If you are determined to run one loop, then you need more radiator cooling field to get the job done, simple as that.
It's amazing what's actually expected one radiator to handle with CPUs and Graphics cards getting hotter and hotter and hotter to run.
Most radiators that run the dimensions you posted are only running 43mm thick cores, even though radiators may seem to be the same as old days they really are not, WHY?
Because so many users have ran screws through the tubing installing their fans that radiators are now designed with the core being further set in and some even have made metal plates to stop the screws.
Which means in translation what you see in radiator dimensions is no longer what you actually get!
IMO the simplest solution is not to shrink the actual core but align the tubing so they're not in the path of the screws, a No-Brainer!
So many want to claim the 360 is good enough, yeah for a completely stock configuration maybe, but more cooling can be found with the proper cooling fans added as well, like at least 2,000 rpm minimum.
So there it is! SS