I also have a 7940X and was thinking about the same upgrade. However, mine is delidded and I run 8 cores @ 4.9GHZ and the rest are at 4.8GHZ - I have also optimized my memory (3600Mhz) to below 50ns latency......I don't need more cores for what I do either so I decided against buying a new CPU for this platform (I am on ROG RAMPAGE VI - the original).
If I was you I would seek to ocerclock the 7940X since your clocks are low compared to what others have managed with this.....Unless you don't fell comfortable with this or your cooling is not up to it...I am on a custom loop with dual D5s and a MORA radiator with 9X140mm fans.
I don't play games (maybe 1-2 per year) and I am on a Pro 32" 4K monitor (60Hz) so I don't think a new CPU would make a dramatic difference either.........
I would overclock your CPU or wait till DDR5 platforms are available before I upgrade.........Also wait for ZEN 3 and see what it brings.......maybe it is worth it for you if it saves you time and helps you earn more money through your work.
Hey there, thanks for your input.
I am clearly not as skilled overclocker as you are, so there is a good chance i could OC my CPU higher, by the combination of those various settings, than i did, if i knew better. Really, my OCing was about changing like 5 settings in BIOS :-D, i never did the meticulous testing of stability for each core, etc... While OCing is kinda fun for me, its mostly down to the thrill of finding out how much unused potential is there left, but once there is too much work involved (like changing settings, testing stability, rinse and repeat ad nauseum, to get every last drop of performance), i am out
Anyway, perhaps i could not do much more. I dont have delidded CPU nor do i have your fancy loop, i am cooling it with basic 360 AIO (AC Eisbaer) - i am not even sure for how many watts is such AIO intended - i mean, it can keep my CPU under 90C at 4,1GHz and cca 250W...is this its cooling performance limit or if i got the CPU delidded, temps would be significantly lower, so i could allow higher clocks (more watts)?....i dont know.
Waiting for next Intel or AMD HEDT is obviously an option. I might still do it. It was my intention until last week, when i randomly found the 10980xe to be fairly available around here, so it got me thinking.
BTW, my machine got somewhat unstable lately. Getting random BSODs, funnily while browsing web or watching utube or even skyping, never during gaming, autoCAD drawinf, octane rendering or CB runs (actual heavier tasks). The reason is always WHEA UNCORRECTABLE ERROR. Do you think its down to my OC not being stable anymore, maybe cause of the degradation or whatever else, or more likely software issue? Truth to be told, my Windows is borked as hell, it screwed itself during one of those autoupdates and cant even be updated anymore. I am stuck at 1803 version or so, tried downloading their Media Creation tool to manually update it, only for the update to fail in the middle of the process.... i suppose i need complete reinstall, but since for work its OK, i am lazy to do that.