Yes, it works well.
Yes, it works well.
Yes, pairing a 4070 Super with a Ryzen 7 7700X can work well. You likely won’t need to upgrade the CPU unless you have specific performance or power requirements.
It's more useful to evaluate a CPU-GPU pairing within a complete setup that includes performance goals and actual applications, rather than just looking at individual components. This approach shifts the focus to practical scenarios like "What's the best GPU for <budget amount> with a suitable CPU for my needs?" It helps you compare options across generations and even on used platforms for better value. In short, defining your use case and budget will greatly improve the results.
They work well together. I tried a 7700x with a 6900xt at 1440 UW and it performed great.