The Steam Client Beta has been updated with the following changes: General The Steam client is now 64-bit on Windows 11 and Windows 10 64-bit. Systems running 32-bit versions of Windows will continue receiving updates to the 32-bit Steam client until January 1, 2026. Game Recording Fixed errors copying to clipboard or exporting H265 videos on systems with a NVIDIA 50xx series gpu.
Probably not with any usable level of performance. It’s not just about address width but CPU instruction set, too.