The FSR4 4.1.0 Saga continues.
You can now extract the new FSR4 4.1.0 upgrade DLL from the official 26.3.1 Windows 11 driver. Why AMD removed it from the amdxcffx64.dll archive page is beyond me.
Anyways, the 26.3.1 driver package contains two amdxcffx64.dll files, the one you want is 51.5 MB (50 MiB) and is located in the B025836 directory.
Windows 11 driver v26.3.1
File Name : amdxcffx64.dll
Directory : ./B025819
Time Stamp : 2025:03:14 07:58:15-06:00
Company Name : Advanced Micro Devices, Inc.
File Description : DX12 AMD Driver Based FidelityFX Library
File Version : 1.0.0.40394
File Name : amdxcffx64.dll
Directory : ./B025836
Time Stamp : 2026:02:26 11:47:06-07:00
Company Name : Advanced Micro Devices, Inc.
File Description : DX12 AMD Driver Based FidelityFX Library
File Version : 2.2.0.1328
The DLL from reddit is the same as the one included in the 26.3.1 driver release, so no need to download it again, but if you want to check file integrity, here’s the sha256sum:
50ac9e3303d51973e1e720101ce6722fab22fdbf3de6c2d3960c06682dacc03f ./amdxcffx64.dll
And Intel also released a new v101.8626 Windows 11 driver:
Windows 11 driver v101.8626
File Name : igxell.dll
Time Stamp : 2025:11:13 13:02:47-07:00
Company Name : Intel Corporation
File Description : XeLL SDK
File Version : 1.3.0.3
Internal Name : libxell.dll
File Name : igxess.dll
Time Stamp : 2024:04:26 06:51:50-06:00
Company Name : Intel Corporation
File Description : Intel(R) Xe Super Sampling
File Version : 1.4.8.0
Internal Name : igxess.dll
File Name : igxess2.dll
Time Stamp : 2025:10:08 10:08:57-06:00
Company Name : Intel Corporation
File Description : XeSS SDK
File Version : 2.0.2.64
Internal Name : libxess.dll
File Name : igxess_fg.dll
Time Stamp : 2025:11:24 15:40:10-07:00
Company Name : Intel Corporation
File Description : XeSS Frame Generation SDK
File Version : 1.3.1.52
Internal Name : libxess_fg.dll
Notice how Intel tries to be clever and rename some of the XeSS DLLs. And comparing with the XeSS SDK 3.0.0, these are all older versions, but the igxess.dll does seem to be used by some games like The Witcher 3, so you can use this DLL to update any games that use it. This also shows that “new” drivers don’t actually provide the latest versions of each vendor’s upscaling DLLs–as this driver is “newer” than the XeSS SDK 3.0.0.