Weeks after AMD FSR 4 source code was accidentally leaked online, gamers have been putting it to the test on older RDNA 2 and 3 cards, with some surprising results. According to the tests, running the upscaling tech on older AMD cards like the AMD Radeon RX 6800 XT results in far better image quality for the most part, with only a small drop in performance.So far, AMD hasnt officially enabled FSR 4 on older graphics cards, limiting its accessibility to its brand-new RDNA 4 GPUs like the AMD Radeon RX 9070 XT, which we recommend in our best graphics card guide. These mods, however, prove that the new tech can work on older GPUs, even if it isnt the easiest process to enable.Read the full story on PCGamesN: Make games look loads better on your old AMD Radeon GPU with this new FSR 4 mod