Does rendering to image sequence or movie from sequencer use CPU or GPU?

Does rendering to image sequence or movie from sequencer use CPU or GPU?

I am building a new computer that will be used to model, animate with Maya and Blender; then render the shots with Unreal sequencer.
I have looked around and everything is about making just games.

If sequencer uses GPU to render I will get a GTX 1080 but if it does not I would rather get a GTX 1070 and use the 200 in savings for bigger SSD.
CPU will be i7-5820K and 32 gigs of ram.

Thank you for your time.

It uses both but depends more on the GPU.
However, the framerate when you’re recording to a video is set so it will take however much time it needs to maintain that framerate so even if you have a bad GPU you can render nice looking stuff at 30fps, it will just take longer.

I’m getting ahead of myself but I want to future proof my computer.
So a 1070 should be able to handle about anything?

Pretty much, the 1070 is a high-end graphics card.

Good gosh, over 5000 posts.
I have 3.
Thank you for helping with my decision.