What graphics card are you using?
Which OLED are you using?
What are resolution and color output mode are you using?
I have a strong and good video card
I'm looking for someone who has an OLED and knows what I'm writing about
It's not a guessing question .
How do you expect us to help you if you can't even give us the model of your TV and your video card? Without those we're just guessing.