Some sites have tested the technical quality of the Horizon Zero Dawn PC port:
Ars Technica - Horizon Zero Dawn on PC: Not the optimized port we were hoping for
Eurogamer - Horizon Zero Dawn's PC port is deeply disappointing
Digital Foundry - Horizon Zero Dawn PC: An Amazing Game Gets A Disappointing Port
PC Invasion - Horizon Zero Dawn technical review - Can't see the forest
Rock Paper Shotgun - Despite stellar performance on our end, Horizon Zero Dawn's PC port has been nearly unplayable for others
More information.
Ars Technica - Horizon Zero Dawn on PC: Not the optimized port we were hoping for
Eurogamer - Horizon Zero Dawn's PC port is deeply disappointing
Digital Foundry - Horizon Zero Dawn PC: An Amazing Game Gets A Disappointing Port
PC Invasion - Horizon Zero Dawn technical review - Can't see the forest
Rock Paper Shotgun - Despite stellar performance on our end, Horizon Zero Dawn's PC port has been nearly unplayable for others
More information.