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CPU for streaming games.

post #1 of 9
Thread Starter 
So this winter im looking into the possibility of using a secondary computer to stream video games from my main computer to Twitch.TV in 720p or 1080p. I already have a matx socket 775 computer that needs a cpu, my question is will a dual core be able to handle the encoding with no major problems? The reason I say dual and not quad core, is this matx computer only has a 90W psu. the computer cant use PCIE video cards so i think the encoding will be handled by the cpu as far as i know, unless a PCI video card such as this would handle the encoding. http://www.newegg.com/Product/Product.aspx?Item=N82E16814500262
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post #2 of 9
I don't think so. My old computer (just replaced like a week ago) had a Q9450 and it could not even stream. Sorry frown.gif
post #3 of 9
That will not work very well unfortunately. If you want a decent quality stream you will need something way more powerful. What is you main computer? It might be better you upgrade you main computer than to spend money on a second computer because for the second system you will also need a capture card which is expensive.
post #4 of 9
In order to play on decent settings and stream at the same time you are going to want atleast an i5, an i7 or 8 core bulldozer would be better in this case.
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post #5 of 9
Quote:
Originally Posted by Ironman517 View Post

In order to play on decent settings and stream at the same time you are going to want atleast an i5, an i7 or 8 core bulldozer would be better in this case.

Indeed, that is why I asked what his main system is.
post #6 of 9
Quote:
Originally Posted by Conquistador SW View Post

Indeed, that is why I asked what his main system is.
C2D is in the sig and he is asking about the 775 socket
So I would assume he is using a C2D thumb.gif
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post #7 of 9
Quote:
Originally Posted by Ironman517 View Post

C2D is in the sig and he is asking about the 775 socket
So I would assume he is using a C2D thumb.gif

Ah, that would be unfortunate. I don't think streaming will work very well for him then. frown.gif
post #8 of 9
Thread Starter 
Well I was planning on building a new computer this christmas with an i7. But I already have a computer thats in my closet that just needs a cpu and ram, a 775 dual core cant handle encoding an incoming hdmi video source? and just compress it for a stream? I can already stream on my laptop @ 720 with about 15 fps, of starcraft 2 (its currently running a 2.5ghz c2d). Or would the capture card/ GPU in the computer doing the streaming do most of the work (is kind of my question). Ultimately if it wont work well this way I will just be streaming from my main computer.
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post #9 of 9
There is a box by Hauppauge that has an HDMI input and output that will allow you to record an unencrypted HDMI signal. It has a hardware H.264 encoder, which is particularly good for web streaming and use with most mobile devices H.264 does a great job of compressing the video stream. Unfortunately, none of the features specify live streaming capabilities, so I don't know if it will actually work for what you want.

The absolute best option would be to upgrade the gaming PC to an i7. It costs about $100 more than an i5 would (i5's are generally considered the best processor -- most cost-effective, that is -- for gaming purposes), which is less than the cost of a capture card that can handle a hardware transcode to MPEG-4/AVC/H.264 (the box that Hauppauge makes has an MSRP of $164). The upgrade from i5 to i7 gives you a slightly better core and adds HyperThreading technology, which goes a long way towards giving you a smooth encode for live streaming. Most forum posts I have seen have reported that an i5 isn't powerful enough to live stream a game that is being played, while the i7 processors are reported to handle live streaming comfortably. I only have anecdotal evidence, though, and nothing I have seen has ever gone into detail about what capture software or codecs were used for streaming, nor what games or graphics settings were required to have a successful stream.

Regardless of the lack of information I have regarding the details, I would suggest an i7-3770(K) unless you have the money and use for an i7-3930K (this CPU is an absolute money pit, but if anything can handle all that multitasking, this chip can). A separate Core 2 CPU just won't be able to handle a live encode at a resolution that you would be happy with. If you wanted to just have the C2D system record the stream, it would be perfectly capable, and then you could stream the performance later after the system had time to catch up with encoding the stream. You may be able to pull off a live stream of the event at a low resolution, but I am not completely sure about how possible that would be, nor how poor the quality would have to be in order to keep up.
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