Sure I’ll entertain . Let’s look at counter strike . 1440p benches show 578fps . At 4k benches show 347 fps .if the 9800x3d used here bottlenecked this card I would expect to see the same fps or very close to 347fps at 1440p. How did I do ?
The 9800X3D could still bottleneck this GPU fine on both resolutions even if the FPS is different. The only issue is, you can barely test it because there's hardly a faster CPU out there. But, the fact that these GPUs (4090, 5090) end up closer together on lower resolutions, indicates they are bottlenecked by something in the pipeline and you're not seeing the full grunt the faster GPU has on offer.
I'm not here to insult you - but perhaps you have a few things to learn.
Let's look a bit longer at CS2 and do some math. 3090 vs 5090 this time?
1080p
726 / 403 = 1,8014 = 180% performance win for 5090
1440p
578 / 289 = 2,0000 = 200% performance win for 5090
4K
347 / 152 = 2,2828 = 228% performance win for 5090
Neither of these GPUs struggle on this game in terms of resources, they all produce immense FPS
At the lower resolutions though, EVEN at 1440p and 4K, there is a CPU impact on the 5090, because it is leaps and bounds faster (48%!!) at 4K. I bet at 8K, you would see an even bigger gap, moving even more load onto the GPU and removing the CPU further as a limiting factor.
You see, a cpu bottleneck isn't just 'cpu too slow'... it loses a fraction of a second on
every frame, and when frames are produced at such high frequencies, every millisecond matters and returns in lost GPU performance. In heavier titles, with lower FPS, this effect is less pronounced because now you've got a generally higher average time to produce a frame; a lot more leeway for CPUs to prepare data for said frame.