TV Monitor OCing problem

Hello guys , i'm having a problem My TV Monitor(60hz) is connected to an RX 580 using a DVI To VGA when I'm O'C my TV Monitor to any refresh rates(65hz to 75hz) its aspect ratio changes or it stretches badly, black bars on the upper screen too any solution to this?
thanks!.


https://imgur.com/W95t4Y2
https://imgur.com/AHOlcYK

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