In WHAT? This question is too vague.
Games: the higher the resolution, the greater the graphics horsepower needed.
Performance-wise, the
980Ti is roughly equivalent to a 1660 - numbers 24 and 25 on the linked list.
At best, this gpu is a 1080p card in modern titles.
Rendering: this was answered in the
link in my other post.
"On the GPU side, while After Effects can take advantage of the video card to process GPU-accelerated effects, you are almost always going to be limited by the performance of your CPU.
We have found in our testing that even a mid-range GPU will be similar in performance to a high-end one. Because of this, we will be using the NVIDIA GeForce RTX 2060 SUPER 8GB on this (and all the other) configuration."
The old 980Ti will be fine here.
"For the system memory, we will be using 32GB of RAM since After Effects is a memory hungry application. Each frame you render is stored in RAM preview so that Ae doesn't have to re-render the frame each time you hit play. With more RAM, you can store more already rendered frames, which lessens the chance that Ae will have to re-render frames that haven't change."
The focus should be on cpu and ram.
"However, if you also work with Premiere Pro or DaVinci Resolve, you may want to bump the GPU up to a n RTX 2080 SUPER or even an RTX 2080 Ti. But since this post is focusing on After Effects in particular, we are instead going to put more of the budget towards significantly more RAM (128GB) as well as a dedicated Samsung 970 Pro 512GB drive for the disk cache. Even with 128GB of RAM, having a dedicated drive for the disk cache can be very important - not least since it will be able to store the frames from RAM preview between working sessions."
You were specifically stating After Effects, but I added in this quote too just in case.
"For the best possible performance in After Effects, we will be using the AMD Threadripper 3960X 24 core processor. AMD does have CPUs with even more cores (the Threadripper 3970X 32 core and 3990X 64 core), but they are actually
slower in applications like After Effects. So, in this case, we do
not want to simply go with the most expensive option and instead will be using the less expensive and faster Threadripper 3960X. The one downside to this platform is that Thunderbolt is not as established as it is on Intel-based platforms, so if Thunderbolt support is a requirement, you may opt to use the "better" configuration even if you have the budget to go with AMD Threadripper."
Bam! There ya go. 3970X and 3990X are too much, and are actually worse.
"With the AMD Threadripper 3960X, not only do we get a small bump in performance, but also the capability to have 256GB of RAM. This allows for more frames to be stored in RAM preview and lessens the chance that Ae will have to re-render frames that haven't changed which can greatly increase your productivity. More than the performance from the CPU itself, the ability to have this much RAM is what really sets this system apart from the "Better" configuration."
More food for thought.