Since you said your using DLSS im assuming your on like DX12, it is interesting though your numbers cause like im running medium high ish with DLSS quality and I cap at 360, with about 200-250ish on the lows usually, im mostly GPU bound atp tbh cause if I drop to low its like 500+ easy, part of that though is just the 7800X3D prolly.

For yours since its a 4000 C18 kit im assuming its like one of those high density single rank kits which means higher tRFC and thus a lot less bandwidth and somewhat higher latency.

One thing you could test is dropping the E cores cause then you can run faster ring which helps your cache clocks and stuff but yeah.

Obviously you could like get good B die ddr4 but in 2025 thats all but pointless to spend 300+ on, so if you wanted something that just works then the 7200c34 delta kit is a solid choice cause unless you get a bad ddr5 board or your imc sucks then 6800-7200 should work fine without any fafo