First of all - try to touch backplate. 3090 may throttle due to high memory temperature. If its ok - try to add core clock several times per 100MH one time.
I have checked HWInfo and no thermal throttling, only power throttle!
In MSI Afterburner its not even displaying the mV, why would that be do you think?
Also the fan for the backplate that comes with the unit doesnt fit into my case because of another cable

Thanks for replies

You will not see memory throttle, that`s why try to touch. I can`t say anything about MSI Afterburner - i just don`t remember it. Try HiveOS or RaveOS. It`s simple and helps to configure your GPUs easily.
New version of HWinfo shows memory temps for my 3090s. If its lower then 110 there is no throttling.
By the way backplate of Palit (96C mem) is hotter than Gigabyate Eagle (108C mem), when i touch it.
Good morning Jazz1984:
I have a Gigabyte Aorus 3090 Xtreme Waterforce and I have only been able to adjust the temperature of the VRM to 108 degrees, incorporating 4 fans (two above the backplate and two below the GPU). My question is if you can tell me the heatsink you have used, what temperatures you have achieved in the VRMs and what configuration you have in aftterburner.
Thank you.
All the best.
my settings - 0.725V 1100 Mhz Core/ 10500 Mhz memory
its on eth 120Mh/300W power consumption
Sounds like your Palit has better thermal pads in the back that transfer heat better to the backplate. F'ing Gigabyte must have gone cheap with the thermal pads. I tried to figure out the pad thickness online and I am finding it's 3.0mm yet Thermal Grizzly and Gelid are both out of stock for 3.0mm pads.