Enabling AMD's latest upscaler on older Radeon GPUs isn't as difficult as it previously seemed. With a newly discovered trick, one can enable FSR 4 even on RX 6000 GPUs.
By Swapping Two Files in the New Adrenalin Driver, User Demonstrates Improved Visual Quality in Games With AMD RDNA 2 GPUs
A while ago, it was discovered that FSR 4 also works with Radeon RX 7000 GPUs on Windows OS. This method incorporated INT8 model files that leaked from the AMD source code previously, and apparently also worked for RDNA 2, aka Radeon RX 6000 GPUs. However, these GPUs reportedly didn't respond well to the latest upscaler and had noticeable performance impacts, but it looks like someone just fixed it with a simple trick.
It's not the first time someone tried to enable FSR 4 on an RX 6000 GPU, but it had nearly 10-20% impact on the performance, resulting in a choppy gaming experience. Unlike the traditional method, where one has to use tools like OptiScaler to utilize the custom modded DLL, a user from the Computer Base community found a simpler method, which gets the job done, but without performance regression.
- A packing program such as must be installed on the system 7-zip Or WinRAR be installed.
- The old driver must be unpacked via 7-Zip or WinRAR via the extended context menu (right click).
- The new driver must be unpacked via 7-Zip or WinRAR via the extended context menu (right click).
- Then it applies in the old driver in the directory Packages, Drivers, Display, WT6A_INF, B395348, find the files amdxc32.dll and amdxc64.dll.
- Now in the new driver in the same directory (note, the folder called "Bxxxxx“ is different in each driver) the existing files must be overwritten with the old ones.
- The new driver is then installed via the unpacked archive.
By swapping two files, "amdxd32.dll" and "amdxc64.dll" in the latest Adrenalin driver, one can turn on FSR 4 on RX 6000 GPUs. To do this, there are a couple of steps one has to follow, which require unpacking older Adrenalin drivers, such as 23.9.1, and the latest Adrenalin driver version, followed by replacing the above-mentioned files in the newer driver.
The user who implemented this method also showcased the differences in the visual quality with RX 6000 GPUs, such as the RX 6800. He uploaded multiple videos, showcasing the image quality with different FSR 4 presets such as Native, Quality, and Performance, and also compared it directly with the Radeon RX 9070, which officially supports FSR 4 natively. We can see that the FSR 4 Native/Quality is now almost identical to what the RX 9070 offers and also offers very similar image quality to Native, but what's more impressive is that with FSR 4, there is no performance impact at all.
| Kena: Bridge of Spirits | AVG FPS | P1 FPS | P0.1 FPS |
| FSR3.1.5 Quality | 35.2 | 22.5 | 16.9 |
| FSR4 Performance | 33.0 | 22.9 | 17.4 |
| FSR4 Quality | 29,9 | 20.4 | 16.2 |
| TAA Native | 29,9 | 19.4 | 15.9 |
So for me, on the whole, the RX 6800 and the RX 9070 are equivalent in terms of image quality. If the RX 9070 looks slightly better in one place, it's probably because the INT8 version from the leak is a bit older and not as polished as the current FP8 version. This is not an FSR4 Light for me, and cannot be compared to XeSS on Intel or other GPUs.
- mario_mendel34 (via Computer Base)
About the author: Sarfraz Khan is a hardware reporter with a focus on PC components and the builder community. With years of experience writing about PC hardware and laptops, his work has been featured on several reputable technology publications. Sarfraz's hands-on experience is demonstrated through his first-person accounts of using and comparing different hardware configurations, providing practical and relatable insights for everyday users. His technical analysis is respected by peers in the enthusiast community and has been cited by specialized hardware sites such as Germany's Igor's Lab.
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