definitely believable

16gb ddr3 ram

ten year old i5

rx580 8gb

arch linux gnome desktop

standard prebuilt dell pc

have two of these machines built and operating in the house both are able to play modern games including Hogwarts Legacy low settings at 60fps no ray tracing

some games run fine with medium or high

some games such as Hogwarts Legacy and Marvel’s Spider-Man Remastered require a per game specialized wine wrapper script that is usually already made by an awesome entity unless you go through the steam launcher and then it just plays like a steam deck

https://en.wikipedia.org/wiki/Steam_Deck

"Steam Deck runs SteamOS version 3, based on the Arch Linux operating system. While SteamOS had been previously developed for Steam Machines using Debian Linux, Valve stated that they wanted to use a rolling upgrade approach for the Deck's system software, a function Debian was not designed for but was a feature of Arch Linux. An application programming interface (API) specific for the Steam Deck is available to game developers, allowing a game to specify certain settings if it is being run on a Steam Deck compared to a normal computer. Within the Steam storefront, developers can populate a special file depot for their game with lower-resolution textures and other reduced elements to allow their game to perform better on the Steam Deck; Steam automatically detects and downloads the appropriate files for the system (whether on a computer or Steam Deck) when the user installs the game"

Why does the Nobara benchmark report as Windows 10 pro?

There's no such thing as magic. Some computation is absolutely getting skipped.

well, unfortunately i have the opposite but it's not too bad. high settings with motion blur etc.,fsr disabled but with chromatic aberration on i get like 10fps less than windows gtx 1660 ti and ryzen 5 3600 prolly a nvidia issue