TL;DR: Yeah, get a bracket. It's called GPU sag and it stresses the PCIe slot, so don't ignore it. You dont need to spend much either. Basically, just grab the Cooler Master ELV8 GPU Support if you want something that looks kinda cool and fits in the budget. It mounts to the slot covers and takes the weight off the motherboard. If that looks too gamer-y for you, just pick up a uphere Graphics Card GPU Brace Support for like ten bucks on Amazon. It's just a simple metal pillar that sits at the bottom of the case. Super easy to install and it does the job perfectly. Just make sure you tighten it enough to lift the card level, but dont go crazy and push it too hard. Your 4070 ti super will be totally fine once it's braced.

Honestly, sag is a real headache and it can definitely damage the pins on your PCIe slot over time. Just letting it hang is a recipe for disaster with these newer heavy cards. I tried some of those super cheap generic poles before and honestly, they were garbage. The threads stripped out immediately and it felt like it was gonna tip over at any moment. You really need something that actually locks into the chassis rather than just resting on the bottom of the case. I ended up switching to the Lian Li GB-001 Graphics Card Anti-Sag Bracket which is way more reliable because it hides behind the card and mounts directly to the standoffs. It is not as flashy as the LED stuff, but it stays out of the way and keeps everything level. Just make sure you check your case compatibility first.

Re: "TL;DR: Yeah, get a bracket. It's called GPU..." honestly you dont need anything fancy! Those big flashy brackets are cool but overkill. I grabbed the upHere Graphics Card GPU Support Bracket and it works like a charm. It is super cheap and really subtle so it doesnt ruin the aesthetic of the build. Honestly it was the best 10 bucks I spent for my peace of mind. Just install it and the sag is totally gone!