Ubisoft has released details for the PC system requirements that you need in order to play South Park: The Fractured But Whole. The specs are not too high.
Ubisoft released the details on the official blog. Both the minimum and recommended specs have been posted down below for South Park: The Fractured But Whole. Check them out.
Minimum Configuration
Resolution:720p @~60FPS
Video Preset: Low
V-Sync: Off
OS: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
PROCESSOR: Intel Core i5 2400 | AMD FX 4320 or equivalent
VIDEO CARD: NVIDIA GeForce GTX 560Ti / GTX 650 / GTX 750 / GTX 950 / GTX 1050
AMD Radeon HD 7850 / R9 270 / R9 370 / RX 460
(2GB VRAM or above)
SYSTEM RAM: 6 GB
Recommended Configuration
Resolution: 1080p @~60FPS
Video Preset: High
V-Sync: Off
OS: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
PROCESSOR: Intel Core i5-4690K | AMD FX-8350 or equivalent
VIDEO CARD: NVIDIA GeForce GTX 670 / GTX 750ti / GTX 960 / GTX 1060
AMD Radeon R9 280X / R9 380 / RX 470
(2 GB VRAM or above)
SYSTEM RAM: 8 GB
The game itself will be released on October 17th, 2017 for the PC, PS4 and Xbox One platforms.