AW3225QF EDID values

Hello by default monitor reports 426 nits fo any mode apart P1000.  Somewhere I saw  monitor can push 450, but when I use windows calibration tool I get 470.   So where is right value?

If it actuially  push up to 470 can monitor report 470 because I use RXT HDR and it's stuck at 426  any calibration or CRU value mod does not help to fix this.