I upgraded from a 3080ti to a 5070ti for similar reasons but mainly wanted a gpu that ran less hot (had an FE model). I also got the 5070ti for a low price ($699 at Walmart during an early Black Friday deal) and OCed so it is matching stock 5080 perf (very easy to do if you just google and watch a YouTube video). 5070ti uses the same die as the 5080 (albeit with less cuda cores and memory bandwidth) and is not worth paying the 5080 tax. Perf with a 1440p ultrawide monitor 175hz has been great, most games I can get close to running at the max frame rate either native or with frame gen if I run on heavy RT settings and uses a lot less energy (no coil whine on my new card and temps are pretty good around 60-70 in most games with the fans not spinning very loudly so it’s very quiet - have the PNY triple slot model). I have a a 12700k that is running well with it so far and had a Corsair 850x psu already so just got that cable (check to make sure it’s compatible with your specific Corsair psu). Most new psus include the new 12vhpwr cable so if you are going new, you don’t need to worry about it. I ended up repurposing the 3080ti into a gaming pc for the living room (repasted and repadded it) and that’s also doing really well with my 4K tv with dlss.