Not a direct recommendation... just food for thought
- GPU encode offload, if you are okay with the native encoder hardware options, will lower CPU demand. it is a balancing act.. meaning the answer is .. it depends
And then I'd suggest you ask yourself your expectations on the life of this PC? I ask as streaming is currently stuck on H.264 due to H.265 licensing mess. But now we have AV1 encoders (2 of 3 main GPU mfgs), which seem poised, over time, to take over (hopefully?). But these are 1st gen AV1 encoders, with all that implies. Meaning if you don't want to swap GPU in a couple of years, you could get an AV1 capable GPU now, and stick with its limitations (which may or may not be an issue.. TBD). sorry, I know enough to know it is a consideration, but my crystal ball isn't that clear to be able to give a confident recommendation on if/when a streaming transition to a newer, more bandwidth efficient, codec will be (and then whether the newest Intel ARC or nVidia RTX 4xxx GPUs will work well with streaming CDNs (like Twitch) requirements).
- As for RAM, I'd look to Adobe Pro's 4K video recommendation on RAM (likely to be way more than just OBS requires)
- As for CPU, ... I'd ask yourself instead your planned workflow first. For example, is moving large videos files to/from the PC over USB a desire? ie, will you want 40gb/s USB4 or Thunderbolt 4 to an external NVMe drive? if yes, that will probably be a criteria that will greatly limit your options (it is for me... Hoping the newest CPUs, just now being releases and new motherboards, will address this). Being fed up with Intel, I really wanted to go AMD, but AMD has some significant issues of their own (the software supporting their hardware being a key drawback)... no good choice... pick your poison..
IF data transfers primarily over the network? will that be local and will you want more than 1GbE. I spec all new systems to support > 1GbE as I expect 4-5 year life on such systems, and 1GbE just too slow (for me) for large file transfers. I had hoped 802.11bz would have been more broadly supported sooner, as at this point, it may be time to simply skip 802.11bz and go straight to 10GbE.. but that is even more rare in the home/consumer realm at this point.
With expected upcoming recession, PC sales have already started to sink. There will likely be really good deals in the months to come, with DDR5 having a lower price premium, SSDs sales have already started.. etc.
Also, are you planning a do-it-yourself custom build, or a OEM standard system?
