AMD's FSR 4 expands its compatibility thanks to OptiScaler's ability to convert any contemporary upscaler into FSR 4, provided that the game isn't built upon Vulkan or contains anti-cheat software, excluding such titles.
OptiScaler, a third-party application, is revolutionising the gaming landscape by enabling AMD's FSR 4 upscaling technology in games that do not natively support it. This innovative tool acts as a middleware DLL, intercepting upscaling calls made by games and redirecting them to use FSR 4, providing enhanced AI-driven frame generation and upscaling on RDNA 4 GPUs.
To make use of OptiScaler, you'll need a compatible GPU based on AMD's RDNA 4 architecture, such as the Radeon RX 9000 series. The process involves manually installing OptiScaler files into each game's directory and configuring settings using batch scripts. It's important to note that this is not a simple toggle or automatic solution, and per-game setup is required for OptiScaler to function effectively.
The prerequisites for using OptiScaler are as follows:
- The game must support DirectX 11 or DirectX 12 (not Vulkan) and already include DLSS 2+ or FSR 2+ as a native upscaler.
- The game must not use anti-cheat software or Vulkan API, as OptiScaler's FSR 4 support does not work in these environments.
OptiScaler can convert older FSR or DLSS tech to FSR 4, DLSS, or XeSS, thereby enhancing the gaming experience for many titles. It's worth mentioning that Nvidia's DLSS technology has been dominating the upscaling market for some time, using neural networks trained on massive datasets. However, AMD's FSR 4 update matches the quality of Nvidia's DLSS 4 technologies.
As of May 2025, over 125 games have DLSS 4 (with frame gen), and with OptiScaler, this number could increase significantly, making FSR 4 more accessible to a wider audience. While most games that support FSR 4 are obscure titles, the introduction of OptiScaler could broaden the application of this technology to more popular games.
One of the key advantages of OptiScaler is that it does not require additional payment, unlike alternatives like Lossless Scaling. This makes it an appealing option for gamers seeking to improve their gaming experience without incurring extra costs.
In summary, OptiScaler enables AMD GPUs with RDNA 4 to force FSR 4 upscaling in many games that have DLSS or FSR 2+ support but lack native FSR 4 support, by intercepting and redirecting upscaling calls through manual installation and configuration on a per-game basis, excluding Vulkan and anti-cheat-protected titles.
- With OptiScaler, gamers can take advantage of artificial-intelligence-driven frame generation and upscaling on smartphones and gadgets with compatible AMD GPUs, as it can convert older FSR or DLSS tech to FSR 4, DLSS, or XeSS.
- As OptiScaler supports data-and-cloud-computing technology, it could potentially improve the gaming experience on various platforms, not just PCs, by making FSR 4 more accessible to a wider audience.
- In the realm of cybersecurity, OptiScaler offers an added layer of protection against potential issues arising from the installation and usage of third-party applications, given that it requires manual installation and configuration for each game.
