Please list the specs to your build like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
including the age of your PSU if it's been in service for a while.
As for your GPU purchase, where are you located and your preferred site for purchase?
Are we supposed to go off the line of text at the bottom of your post(s)? Sig space specs can and will change over time, rendering this thread and any relevant suggestions moot to the end user in the same boat as you're in right now. Please add your specs to the thread's body as I've asked.
Assuming you're looking at the latest version of Cinema 4D; https://www.maxon.net/en/requirements/cinema-4d-2023-requirements
you're good to go with anything that's the latest on the market. Perhaps an RTX4070Ti though the prices are going to be skewed for your region.