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Using GPU and CPU for 2 displays?

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Hey guys. I'm thinking of picking up a 24" monitor tomorrow as we've wall-mounted the TV that we were dual-purposing for both the PC and the games consoles, so it's now unusable as a monitor.

 

I'm looking at this monitor here: http://www.currys.co.uk/gbuk/computing/pc-monitors/pc-monitors/samsung-s24e510c-full-hd-24-curved-led-monitor-10132564-pdt.html

 

Will I need to connect this to the GPU, or will I be able to plug it into my motherboard HDMI and use the 6700K IGPU to run the second screen independently? I'll be using the dedicated GPU to game, etc. but I'd like to hook it up to the TV as well in order to display other applications, like audacity for instance while I record gameplay.

 

Is this possible or can I ONLY plug the screens into either the GPU or processor GPU?

 

Cheers! :)

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As long as you have the drivers installed and the iGPU enabled in the BIOS, you can run both.

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As long as you have the drivers installed and the iGPU enabled in the BIOS, you can run both.

 

That's great! Installing the Intel graphics drivers shouldn't interfere with Nvidia should it?

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What dedicated gpu do you have? Have you considered running both monitors off of it and avoiding using the integrated graphics at altogether?

Edited by Celcius

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What dedicated gpu do you have? Have you considered running both monitors off of it and avoiding using the integrated graphics at altogether?

 

It's a single GTX 960, no OC. I'm definitely considering both options. Does a second display tend to affect in-game performance at all?

 

In my head it's just coming across as neater to use both the GPU and the iGPU as the 960 only has a single HDMI slot.

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As long as you have the drivers installed and the iGPU enabled in the BIOS, you can run both.

 

That's great! Installing the Intel graphics drivers shouldn't interfere with Nvidia should it?

 

You probably don't even have to install it by hand - Windows should handle it. If you want to test, just swap your monitor over to the onboard port and see if you still get a display. If so, you've got nothing further to do besides pick up a new monitor! :cheers:

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I run my second display off of the gpu, gtx970.  Main is a 27" 1440p and the 2nd is a little 18"? 1280x1024 monitor.  I use it for bf4 battlelog, maps for games I'm playing, or playing youtube or kodi or music while playing something slower like dayz.  Depending on what I'm doing, there may be as much as a 5 fps drop but usually nothing noticeable.

 

I also run two monitors off the gpu at work.  Picture editing and cad/cam drawings, file transfers etc.  

 

I don't know why you would bother with the igpu at all?  Isn't the dedicated card SO vastly superior to igpu units that it handles multiple monitors without breaking a sweat while leaving the cpu to do its computing thing?  Serious question, I haven't googled it yet :P

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I don't know why you would bother with the igpu at all?  Isn't the dedicated card SO vastly superior to igpu units that it handles multiple monitors without breaking a sweat while leaving the cpu to do its computing thing?  Serious question, I haven't googled it yet :P

Well if you paid for that extra silicon on the CPU may as well use it for something :lol:

 

In all seriousness some setups see a large boost in idle GPU power usage when doing multi-monitor on a GPU.  Not a HUGE deal, but idle power consumption can sometimes double.  (let's be clear though, idle while likely the most common state for the card isn't usually that high to begin with) In the case of my 290x it has a habit of not fully dropping clocks to idle levels after gaming (3 monitors connected) but will instantly even watching 1080p youtube videos if just the 4K monitor is hooked up. 

 

I don't have the option with Haswell-E to use onboard, but my wife's second monitor IS run off the 4770K and it drops her idle power usage by around 10w vs both on the 7850k, considering the whole system is drawing ~65w at the wall it's a pretty big jump for just swapping ports.  

 

As for the matter of getting it setup, well sometimes you'll plug it in and it works, others you'll have to enable in windows and some boards disable the iGPU if there's no monitor attached to it and some disable if they detect an add in card and you'll need to force it to enable in BIOS.  It seems to vary a fair bit across brands/models.  I know my signature makes me look like the biggest Gigabyte fanboy, but I do use and sell to customers other stuff...I even do some CPUs that say AMD still.  

 

On a side note, you mentioned recording game play and depending on the application you use some (MSI afterburner for example) and offload the encoding to the Intel iGPU giving it another use.

 

Another note is if you're running Windows 7 I would install the driver from the Intel website for the iGPU as I have run into a few REALLY odd issues with the one Windows update was installing as of a few months back. (Had two computers that installed that driver "forget" their secondary monitor was attached or existed until the driver was removed and the direct from Intel one installed)

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So I'm up and running!

 

20160109_193518.jpg

 

It works perfectly. Had a bit of trouble with the Windows drivers but that was easily fixed by downloading the drivers directly.

 

I've run a few benchmarks and there is no performance hit. I made sure that applications use the correct display device as well, and it all works really well.

 

It looks sleek and I can now monitor performance while recording and just playing games :D

 

My mindset here was that I seem to have a huge CPU overhead while recording now, so I figured I would use the iGPU for the 2nd screen in order to save every frame I possibly can.

 

Even so, using the iGPU doesn't seem to generate any extra load or heat on the CPU. It's great! If it's true that the GPU can double idle load on a second screen, then I'm more than happy doing it this way. Woohoo! :P

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Even so, using the iGPU doesn't seem to generate any extra load or heat on the CPU. It's great! If it's true that the GPU can double idle load on a second screen, then I'm more than happy doing it this way. Woohoo! :P

To maybe help clarify, it's VERY unlikely the GPU's idle wattage will double, however I have seen a few reviews that included multi-monitor power numbers in the past where a couple of particularly bad (at idle power management that is not always bad in other respects) GPUs did.  I want to say some of the HD 6900 series may have been where I saw it though that is likely a total guess at this point (and I sold my 6950 a long time ago so I can't test it myself, not to mention a simple driver change could fix something like that overtime).

 

Chances are though you're getting something in line with my wife's 10w and overall that's still nice :)

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Is there an easy way to test the power draw without using a device that plugs into the wall?

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