The imminent remaster of Horizon Zero Dawn, which was originally released for PC in 2020, will run just fine if you've played Horizon Forbidden West. In other words, the recommended system requirements are the same, and you can probably expect Zero Dawn to look more akin to Forbidden West as a result.
The minimum specs for the remaster are higher than the recommended specs for the original, demanding a minimum 16GB RAM, and GPUs several generations younger. If you're running a long-in-the-tooth PC then you're probably better off just sticking to the older version. Alas, the only way to buy the older version is to buy it as part of a bundle which is $10 pricier ($49.99 in total) than buying the remaster standalone ($39.99). And no, don't go scouring third-party key sellers: Sony has basically wiped the standalone original edition of Horizon Zero Dawn off the face of the earth.
