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Dual Displays on Mac Tube and FCPX

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Kevin Patrick
Dual Displays on Mac Tube and FCPX
on Jan 2, 2016 at 10:28:06 pm

Apple states that FCPX uses both graphics cards for playback and effects.

But what affect does two displays have on performance?
Is it a 5%, 20% or more?

Could I be getting much better performance with just one display?

I realize I could probably test this out, but I was wondering if anyone knew enough about how FCPX works with the GPUs to quantify this.

Thanks.

Mac Pro, Late 2013 (the tube)
Dual D700 graphics cards
Dual 27" displays


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John Davidson
Re: Dual Displays on Mac Tube and FCPX
on Jan 3, 2016 at 2:43:21 am

FCPX and motion apps will work great but expect nothing to be great with CC AE 2015. Ram previews with AE get about 9-12 fps with my dual screen iMac 5k setup with Thunderbolt Display attached. Switched to the non 5k monitor only and it gets to about 23fps.

John Davidson | President / Creative Director | Magic Feather Inc.


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Bret Williams
Re: Dual Displays on Mac Tube and FCPX
on Jan 3, 2016 at 3:46:34 am

John are you talking full Rez ram previews? Usually I skip a frame or two and go half Rez but that's on iMac. I thought Adobe didn't want to call them RAM previews anymore.


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John Davidson
Re: Dual Displays on Mac Tube and FCPX
on Jan 3, 2016 at 6:13:03 am

Yeah, lots of forum posts on Adobe about how real time previews (whatever you want to call them) don't work on Macs. Most folks that have the retina iMacs. When I preview, it plays back at the crap frame rate. When I select render queue, the comp video plays back fine. It's the silliest thing ever. Adobe CC 2015 is a mess.

John Davidson | President / Creative Director | Magic Feather Inc.


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Kevin Patrick
Re: Dual Displays on Mac Tube and FCPX
on Jan 4, 2016 at 1:14:03 pm

So your saying that having one or two displays has a negligible impact on FCPX? Moving to a single display wouldn't help performance in a noticeable way?

What about moving from dual 27" (2560x1440) displays to a single 4K display? From a pixel count, one 4K display is less than two of the 27" displays.

Would it matter if I the 4K display was connected via Display Port (TB) or HDMI?


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Jeff Kirkland
Re: Dual Displays on Mac Tube and FCPX
on Jan 7, 2016 at 10:30:47 pm

If there's a difference, it's going to be in the 5% range, if anything at all. I played with FCPX in all the configuration's you've mentioned while trying to decide on my monitoring options last year, and I didn't notice any perceptible change in speed from setup to setup.

I'll add that a 4k display for using FCPX will have to be massive. At smaller desktop friendly sizes like the 27" 4k display I own, text is way too small to read for any length of time.

One thing I have noticed that seems to make the FCPX user interface a little slower is using a scaled screen resolution. If I use my 4k display scaled back to something I can read, screen refreshing doesn't feel quite as snappy.

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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Kevin Patrick
Re: Dual Displays on Mac Tube and FCPX
on Jan 8, 2016 at 12:32:23 pm

Well that's interesting. Seeing as Apple has been shipping 4K (and now 5K) iMacs, I would think FCPX would not have an issue with screen scaling.


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Jeff Kirkland
Re: Dual Displays on Mac Tube and FCPX
on Jan 8, 2016 at 8:30:12 pm

Well, Apple has been shipping El Capitan for quite a while now and FCPX still isn't 100% compatible with that so I don't think, in Apple's eyes, the state of the hardware has much to do with the performance of the application. I would think that say 5% slower scaled vs unscaled wouldn't be seen as a significant issue.

I'm not saying it's show-stoppingly slow, and it would be greatly influenced by the GPU driving it, but I do personally think the UI updating feels a little more sluggish if I'm not using the screen's native resolution.

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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