Amazon is selling Rev A00 which is known to have a "yellow tint" issue which can't be properly adjusted by settings (just search for it).
This is my second U2312HM so the difference in color is very noticeable.
I requested a replacement but I received Rev A00 again and it still has yellow tint.
The only reason I ordered this discontinued model was because I wanted a perfect dual monitor setup.
When I see left, I see perfectly balanced white and when I see right, I see ... yellowish white.
I don't know what to do now. I'm just so disappointed.