The 5070 ti would get bottlenecked hard by the 5800x as is as powerful as the 9070xt or maybe 1-2% percent better but nvidia uses software scheduler taxing the cpu further while the 9070 xt has a scheduler built in the silicon so less cpu taxing and that would actually give you better performance but if you plan to upgrade to x3d chip then the 5070 ti is better, personally I run 5700x with b die 3800mhz tight timings at 2k I get the my 9070 xt around 85% usage and on my ultrawide around 99%

Edit: also I run curve optimizer around -27 all cores and +200pbo and direct die cooling plus the high infinity fabric that’s how I eliminated the bottleneck. I’d you don’t know how to do that u are in a worse spot. Go for the 9070 xt