what is optiscaler for FSR? looks like a massive performance boost if conditions are right?

Hardware
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https://www.pcgamer.com/hardware/graphics-cards/optiscaler-has-been-updated-to-theoretically-support-amds-fsr-4-in-all-games-with-upscaling-that-dont-use-vulcan-or-anti-cheat-which-is-nice-but-why-the-heck-doesnt-amd-do-this/

Can someone explain this in layman’s terms. and is it only available without anti cheat/non Vulkan?

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never heard of it before, but after reading the article, it seems to be some lines of code that you need to manually install into the game files which allows you to use FSR4 on any game. Essentially doing what game Dev’s are gonna eventually get around to doing anyways with their updates. like the most recent cyberpunk update allows you to use FSR 4 now.
*** Warning*** if you do it wrong, you will probably screw your game up have to delete and reload the entire game. It’s kinda like adding a mod to a game manually. It can have serious consequences.

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o dam. i’m not sure i’m comfortable w/ that