I'm getting 90c while in gaming load I have a 240mm AIO. I just wanted to ask if this is normal or if I should replace my AIO.
List your full PC spec, and PSU, case and number of fans too.
Have you recently installed the CPU? Did you apply thermal paste. Which exact AIO is it?
Edit: Typically your temps should be roughly inline with this:
This is dependant on a number of factors, including ambient temp, cooling system, air flow, case.