So I have one 144hz monitor and one 60hz monitor both 1080p on my current gaming rig. Can I still use the 144hz through dvi or do i have to drop to 60hz and use the hdmi splitter to the cap card?
Yes, with an Nvidia Graphic Card, you can output over hdmi and dvi at the same time, but tell your card to output 144hz over dvi and 60 through hdmi. On an AMD/ATI gpu it can problematic to get this working. There are workarounds though, but they definitely make it a bit complicated.
The audio is also pretty confusing. I would like to have a single mic and headphone set up. So I'm looking at a Mic (XLR), Behringer mixer. I'm just confused as to how i would wire it up and what wires and cables would be needed? i.e 3x 3.5mm female to RCA & 2x 3.5mm to 3.5mm etc etc.
Your mixer would probably give you the option to output the main out to your first pc and a secondary output or monitor output to the second PC, that way you could configure the Mic on both PC's. But, because of your question below, I had a better idea, see also below.
I bookmarked some of your Videos on youtube (amazing stuff) and I definitely would want to be able to talk to stream and then push to talk to Skype/TS whilst the stream gets muted or vice versa. Also this may be a silly question but i would like to use dolby headphone with this set up. Hope i have explained myself well enough.. would totally appreciate some help.
You could use my current setup, I just run a local Teamspeak server, both PC's connect to it. The gaming PC inputs the Microphone and the streaming PC listens to it. In my case I setup a second channel and even send desktop sound over using TS if needed, but mainly because I had problems with HDMI Audio.
For the Microphone part I can recommend it to anyone though, you can setup PTT or Voice Activation and Hotkeys to mute your Mic either on stream or to your mates. One thing though, Skype in general sends everything so you might want to dive into its settings, advanced and then set hotkeys for it too.
To get your desktop sound over, the question is, is your headset USB or does it use normal stereo jack? If it uses a stereo jack you could use a Y-cable and feed your game sound into the mixer, or directly into the second PC. Dolby should probaby work ?!
If your headset uses USB, we might have to use a software like Virtual Audio Cable to first grab the desktop sound (thats done by using VAC as the default playback device) and then distributing it, once to your hdmi output, and thus to the second PC, and once to your Headset. In this case you might loose surround sound (I guess thats what you mean with dolby right?)
Would it do me any good/be worth while to add a capture card to my second PC and use it? Also, I currently have a dual monitor setup for my gaming PC, and then just use one of the monitors for the second PC (both monitors have multiple inputs).
Hmm, the main benefit is that you completely offload all work to the second PC. But I am not sure you will be able to improve the quality of your stream, the FX-4300 might not be enough for that. You might end up with the exact same stream.