Question RTX 3080 ti temp hits

I7-14700KF+Arctic LF III 420mm / EVGA XC3 RTX 3080 ti + Alphacool DC-LT 3600 pump and 250ml reservoir with corsair XG3 and Corsair420mm radiator custom loop. I have a PU-SC1000 at 4500rpm for the new pump and reuse to dc-lt reservoir housing but plugging the motor hole with a plug so it'll just be a reservoir. At 78F ambient i get 49-50C full load with OCCT non-license software and idle at 27C after 1 hour of stress test with the current system setup. Hopefully with the PU-SC1000 i get even better specs because the dc-lt has 2.0L/m and the PU-SC1000 has 20L/m so a great performance increase is expected.
 
I want to cut-out 90mm sections off the old XC3 backplate to mount 2 90mm fans for back cooling because i like seeing a backplate so i'll add an active cooling one with the custom fan mod.