I would say an upgrade would be in order to obtain maximum performance. However, before you decide on the 7950x3d wait for reviews on 27 February (6 days from now). There are some rumors that the 7900x3d might actually perform better in gaming. 

It depends on the game. Even at 4K there were games that were bottlenecked by my old i9 10940x with my old 3090. I later upgraded to a 5800X3D and relieved that constraint - later, with a 4090, I found that there were some slight bottlenecks again. Most notably in Star Citizen, which is my primary game and what I base my overall system performance on.

So, if I was bottlenecked using a 10940X at 4K even using a 3090 (and later 4090), then you'll definitely be CPU bottlenecked at a ~40% lower resolution in many more games.

Now, whether or not that reduction in overall performance matters to YOU - that's something only you can answer. Test things out. If you get too many FPS drops (some call them "stutters") or too low of an average FPS and GPU utilization, then perhaps a platform upgrade is in order. Since upgrading to a 5800X3D I don't have those annoying FPS dips that folks complain about for the new RT updated Witcher 3, or Hogwarts Legacy - a testament to the extra L3 cache that the X3D has. So, I'd recommend going with a 7800X3D when they come out in April. Snag some CL28 5600MHz DDR5 (LTT showed the same performance as a 6000MHz CL30 kit on a 13th gen Intel, and I suspect similar results with the X3D as it's less memory sensitive than the non X3D AMD chips) and the motherboard of your choice.

kacan22
Im running x299 and i9 10980xe. Ordered strix 4090. My resolution is 3440x1440p and sometimes 10320x1440p(for racing games etc).

Now i wonder if 4090 with bottleneck my system. I got few answers on reddit they told me yes.

Dont want to run into sutters or huge fps drops because of that.

If i go with x670e and 7950x3d would get no bottleneck or it would be slightly better?

Thanks!

So Yeah I looked into this my self running a I9-10920X running a 3090 TI, Never experienced any bottleneck that I now of but from what I read the 4080/90 can get up to 25+/-% Bottleneck on our systems. Not sure if the AMD will be any better but we are now sitting on hardware that needs to be updated to be able to run the Newer tech.  Not sure what card your running but you might be better off upgrading your core system first.

only some games are CPU constrained
 
 
found this tool, do not know how well it works (I've not used it) https://pc-builds.com/bottleneck-calculator/
 
 
What Is a CPU or GPU Bottleneck in PC Gaming? (and How to Fix It)

the I9 10980xe is a hell of a processor and you should not be hampered or bottlenecked at your resolutions , your fears are overblown I think , plug in the big old card and enjoy you new gaming experience, wait for the X3D reviews and see where you might gain on your new AM5 decision, if you wonder what might happen with PCIe gen 3 , there is this   https://www.youtube.com/watch?v=v2SuyiHs-O4
If you want a new MB , wait and see which one is going to be best for you.

flyinion
I don't think I'd use Star Citizen as a reliable benchmark for CPU limited.  Being still in development, that thing is massively untuned.  I tried the free demo a year or so a ago (2021) during the Aerospace Expo in game and my 5950X was seeing like 80% utilization or higher.  There's no reason a game should be pegging nearly every core in a 5950X.  That was while running a 2080 Super FTW3.

Oh, it's CPU limited as all hell. That's why I was really pleased with how the 5800X3D got rid of that CPU bottleneck that my 10940X had at 4K with my 3090. And why I was honest and stated that the 4090 is bottlenecked by the 5800X3D in some locations of Star Citizen. To each their own, but as the primary game that I play - it's something that I am very comfortable making comparisons with my old and new hardware. There are other games that do suffer from CPU bottlenecks at 4K with a 4090 and the 10 series CPUs. Settings maxed, including RT, Hogwarts Legacy and The Witcher 3 come to mind - but I don't have that problem in Hogwarts with my 5800X3D. I've not played enough of the RT update of The Witcher 3 to say yet, but out in the country and in small towns it is buttery smooth without FPS drops that others complain so much about. That's the beauty of the massively expanded L3 cache and games that aren't optimized - those FPS dips (or "stutters" as some call it) just aren't there, and it's a very smooth gameplay experience.