Is the 5070 Ti worth the extra cost for editing and 4K gaming?

At those prices, I’d lean toward the 5070 unless your editing projects regularly run into GPU memory limits or you want more headroom for demanding 4K games. The Ti is faster and has 16 GB of VRAM, which can help with heavier workloads and higher-resolution textures, but paying roughly 55% more for it is a steep jump. If your editing is comfortable on the 5070, the money saved could go toward storage, memory, or other parts of the system.

For 4K gaming, the Ti is the more comfortable choice of these two. Its extra performance and VRAM give you more room to use higher settings, though you may still need upscaling in demanding games. If you expect to keep the card for several years and can afford it without stretching the rest of the build, that extra capacity has a clearer use than it would for editing alone.

I’d separate the editing decision from the gaming one. Both cards can be suitable for video editing, and the benefit depends on your footage, effects, timeline, and export settings. Since you use Resolve, check the requirements and benchmarks for the specific features you rely on rather than assuming the more expensive card will make every task much faster. For a 50% price increase, I’d want a real workload reason, not just the idea of future-proofing.

If medium-to-high settings with upscaling are fine and ray tracing isn’t a priority, the 5070 sounds like the sensible value pick. The Ti’s advantages are real, but whether they matter depends on the games and projects you actually run. I wouldn’t pay the premium just because 16 GB sounds safer.