Question / Help 2700k/3770k or Xeon for streaming and local recording

[exR]

My current encoding PC:
ASUS P8P67
i5 3570k stock (can't overclock, dunno why exactly)
8GB RAM
ATI Radeon HD 5770
AVerMedia Live Gamer HD C985 (but I've found a 1080p 120Hz capture card on eBay from Deltacast which I will test as soon as it arrives)

It's okayish streaming 720p60 at 6000kbit/s, but not that great.

I'm now looking for better options for relatively cheap.
My goal would be to still stream at 720p60, but also record a high quality capture at 1080p60 if possible.

What would I need for that?
Would upgrading to a better CPU but staying at the same board be enough? A highly overclocked 2700k f.e.? I've read to prefer the 2700k over the 3770k because he's better to oc?

Or isn't this enough and an older 6 or 8 core Xeon would be the better option? If so, which one would be enough? (Starting at the cheapest and oldest :P)

Thank you in advance :)

 

[Boildown]

I've done both sides of what you're asking. I have a Datapath DVI-DL and used to use a 2600k with a mild OC to 4.3GHz. I used to stream at 720p40 while simultaneously recording at 1080p60. This was on OBS Classic using two instances of OBS running at the same time. I could do it with minimal duplicated frames by recording with NVEnc (GTX 750 Ti) and streaming x264 on Fast preset.

I then updated my capture PC to this setup: https://www.reddit.com/r/Twitch/comments/47bzdc/budget_friendly_secondary_streaming_pc_guide . You can find the exact parts I got and log files from the encodes in that thread.

Either will do the job, but a Xeon E5-2670 will do it significantly better than the 2600/2700k (even more so when you have two of them). I don't know if the economics of obtaining that setup are as good, worse, or better as over a year ago when that reddit post was made, or if there's a new ebay'd CPU that's better now.

Another thing to consider is getting a Ryzen system instead. You'd pay more for the CPU but less for the motherboard. I'd strongly recommend a cheap Maxwell or later Nvidia GPU for easy NVEnc recording (I heard they were all bought up by cryptocoin miners though). If you can do NVEnc (AMD has a similar thing too, but I've never used it) you can dedicate a lot more CPU to the streaming part, which is bitrate constrained and therefore is the best use of the CPU.

If you already have a Xeon in mind ('cause you can get a good deal on it, or something like that), it entirely depends on which Xeon. Some of them would be great, some would be bad. You want a lot of cores and for it to be of the Sandy Bridge generation, or later.

 

[exR]

I think I won't upgrade to a completely new build for now (bought to much stuff in the recent weeks :D ), so the question would be, i7 2700k or i7 3770k and if I want to use NVEnc (which I suppose would be the best solution for local capture?), I'd need a cheap Graphics Card like the 750ti or?

 

[Boildown]

Those two CPUs are nearly identical in performance, get whatever is cheaper. If its a tie, go for the 3770k.

I like the 750 Ti for NVEnc. Also look at the GTX 950 (or 950 Ti) and GTX 1050 (or 1050 Ti). Any one of those would be great for a dedicated streaming PC, get whichever is the cheapest.