1,3 MacBook running external Monitor @ 60hz

WillO95

macrumors member
Original poster
Dec 15, 2014
70
18
Hello ,

Maybe someone can answer this question for me, might sound like a stupid question, but in the Apple Store they couldn't give me a answer!

I am planning to buy the built-to-order 1,3 2016 MacBook, but there is one thing I need to know before purchasing. I currently use a 2013 Retina MacBook Pro 15 at home in clamshell mode plugged into a 34" Ultra-Wide monitor. The MBPR will run 2560x1080 at 60hz no problem. (Note this is through HDMI)

So will the MacBook do the same? I know they say the MacBook will run up to 4K resolutions at 30hz, but some forums seem to suggest that it can handle 60hz at lower resolutions. So considering it is technically only 1080p resolution, can I get the screen to run at 60hz instead of 30hz? Or do I just quit while I'm ahead.

In the store they told me to buy anyway and just return if it doesn't work, but I have to purchase online for a built-to-order, and don't have the time to faff with posting stuff back, so is there someone who can test this for me?

Monitor is a LG34UM57-P

Thanks in advance!
[doublepost=1461746157][/doublepost]Sorry that this appeared twice! Wifi sucks so the iPad reset and didn't realise it had posted!
 

WillO95

macrumors member
Original poster
Dec 15, 2014
70
18
Seeing as HDMI 1.4 supports 1440p (2560x1440) at 60hz i couldn't imagine the rMB having any issue running 2560x1080 at 60hz.
Thanks for the input, makes sense. Shame that on the website apple are very vague about the specs!
 

keviig

macrumors 6502
Jun 7, 2012
498
225
Thanks for the input, makes sense. Shame that on the website apple are very vague about the specs!
They are being very vague indeed. They state it'll only do 4k@30hz, while also stating "Native DisplayPort 1.2 video output". Now DisplayPort 1.2 actually supports 4k@60hz so they are just confusing their customers at this point. If 4k@30hz is what it's limited to, that would equal to DisplayPort 1.1 spec, not 1.2.

However, 4k@30hz still requires a lot more bandwidth than 2560x1080@60hz so you should be good either way!
 
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zhenya

macrumors 603
Jan 6, 2005
6,360
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This page verifies the specifications of the usb-c digital AV adapter in more detail. https://support.apple.com/en-us/HT204360

The HDMI port on this adapter supports the following:

  • TVs, displays, and projectors that you connect via HDMI
  • HDMI 1.4b
  • 720p and 1080p HDTVs, projectors, and displays at up to 1920 x 1200 resolution
  • 4K Ultra-HD TVs and displays with the following resolutions (learn more):
    • 3840 x 2160 at 30Hz
    • 4096 x 2160 at 24Hz