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CAC-1170, MacBook Retina (late 2013), QHD resolution

Updated on 28-03-2018 in Adapters and Cables
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5 on 24-03-2018

Hello everyone,

Before buying CAC-1170 and monitor, I am interested if anyone know if following would work or have  experience with similar setup.

I would like to connect MacBook Retina (late 2013) to monitor LG 38UC99 which supports 3840×1600 QHD resolution. MBR supports HDMI but only at 30 Hz and I would like to avoid this.

LG 38UC99 (and lot of other monitors) have picture by picture (PBP) allowing splitting input screen in two screens. MBR have 2 display ports and each one supports up to 2560 by 1600 pixels. Monitor have one Display port input and one HDMI 2 inputs port.

Now, the question is – would CAC-1170 active adapter allow to connect mini display port from MBR to monitor HDMI input while supporting 1920×1600@60Hz resolution so monitor would display full 3840×1600 resolution at 60 Hz from laptop.

Thanks in advance,
Bojan

MBR specs:
2560 by 1600 pixels
https://support.apple.com/kb/SP691?locale=en_US

Monitor info:
http://www.lg.com/us/monitors/lg-38UC99-W-ultrawide-monitor

CAC-1170 info:
http://www.club-3d.com/en/detail/2339/mini-displayportt-1.2-to-hdmi-2.0/

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MST1407 0 on 26-03-2018

Good day bojanm,

Not quite clear to me what MacBook you have … is it a MacBook Pro ?

Now, the question is – would CAC-1170 active adapter allow to connect mini display port from MBR to monitor HDMI input while supporting 1920×1600@60Hz resolution so monitor would display full 3840×1600 resolution at 60 Hz from laptop.

I think you can set that resolution on your system, but i doubt if tit will display full 3840×1600 this way. The adapter only converts the existing DP signal you chose to output into and HDMI signal.
Since your screen has a DP input, i am not quite clear why you would want to convert that DP Signal …
If you MacBook has a Thunderbolt 2 output, you should be able to output 4K60Hz and  just use a Mini-DP to DP cable like our CAC-2163.

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bojanm 3 on 26-03-2018

Hello,

thanks for answer, I would like to clarify:

MacBook is MacBook Pro (Retina, 13-inch, Late 2013) (specifications: https://support.apple.com/kb/SP691?locale=en_US)

This MacBook Pro does not support 3840×1600 resolution but monitor allows splitting screen into 2 screens, each one gets signal from different input port. One input would be display port, while other input would be HDMI. MacBook Pro has HDMI input but support only 1920×1080@60Hz . This is where I would like to use CAC-1170 adapter to convert signal from other available Thunderbolt port to HDMI.

Does that make sense?

MST1407 on 26-03-2018

Not really.
I dont know any better than that a MBPro late 2013 has a TB2 output looking like this 
and with a lighting sign next to it looking like this

That means it supports DisplayPort 1.2 specs and that the MBPro should be able to output 3840×1600 and send that to the TB2 ouput. Meaning you should be able to use a CAC-2163 cable to connect to your screen and be done.

https://support.apple.com/en-us/HT206587
https://www.macrumors.com/guide/4k-5k-displays-buyers-guide-mac/
https://www.macworld.com/article/2881177/macs/how-to-reset-your-macs-nvram-pram-and-smc.html

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bojanm on 27-03-2018

Thanks for answer.

That would be great even I am still not sure 100% that it would work at full resolution @60. On this forum almost everyone that achieve it had max refreshment of @52:

https://forums.macrumors.com/threads/4k-display-and-retina-macbook-pro-13.1741440/page-11

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MST1407 on 28-03-2018

ah ok, i get your point now, was not aware of that.
Well if your notebook is nto abel to output 4K at 60Hz over its TB2 output, the CAC-1170 or CAC-2170 or any aother adapter like it, will not help you.
They just convert from DP to HDMI, they do not increase frequency or resolution.
They only work around for that would be to use an External USB Graphics Adapter like
CSV-1474
http://www.club-3d.com/en/detail/2412/sensevision_usb_a_to_hdmit_2.0_dual_monitor_4k_60hz/
or CSV-1477
http://www.club-3d.com/en/detail/2413/sensevision_usb_a_to_displayportt_1.2_dual_monitor_4k_60hz/

Those will use a free USB 3.0 port and will aloow you to feed 2 x Screen at 4K 60Hz resolution for sure!

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