Weighing in at 4GB, the new PC-exclusive Ghost Recon Wildlands 1.1.5 patch, as detailed on Steam, brings improved multi-GPU for both SLI and Crossfire system as well as fixes for stuttering and corruption issues. It also improves support for quad-core CPUs, especially Intel Core i5 systems, as well as fixes freezing and performance issues on those systems.
According to the rest of the release notes, the new patch also fixes Steam Controller integration, brings improved Nvidia Ansel support, brings enhanced mouse navigation in store menu, implements 4K menu background scaling, adresses several crash sources and other bug fixes and improvements as well as improves general performance on AMD graphics cards.
The new patch should automatically download on both Steam and uPlay but just in case you should check if your copy has been updated.