2018 MBP 13" and dual 4K monitors

[SheridanMac]

I haven't found much information on the Intel 655 integrated graphics on the new 13" MBP - do we know how well it can handle dual external 4K monitors in clamshell mode? Would I be stuck using default resolution of 1920x1080 or could it handle scaling to 2550x1440? I currently use a 2017 15" with dedicated graphics, plugged into a CalDigit TS3 Plus dock using two 27" 4K displays and that works like a charm, but there may be a new 13" in my household, and I'm curious if it can be used in that way too.

 

[Glmnet1]

Based on the official specs page nothing has changed from the 2017 version and it supports up to two 4k screens:

Simultaneously supports full native resolution on the built-in display at millions of colours and:

• One display with 5120-by-2880 resolution at 60Hz at over a billion colours
• Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colours
• Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colours

As to how well it does it, I'm curious too so I'll watch this thread.

 

[justinrao]

I'm using a 2015 topped up 13'' MBP with two 24'' Dell 4K in native resolution (3840 x 2160) in clamsehll mode for coding. Everything seems work fine. Only lag experienced was when I was re-arranging displays in preferences.

I assume 2018 13'' MBP would perform better than mine.

I haven't found much information on the Intel 655 integrated graphics on the new 13" MBP - do we know how well it can handle dual external 4K monitors in clamshell mode? Would I be stuck using default resolution of 1920x1080 or could it handle scaling to 2550x1440? I currently use a 2017 15" with dedicated graphics, plugged into a CalDigit TS3 Plus dock using two 27" 4K displays and that works like a charm, but there may be a new 13" in my household, and I'm curious if it can be used in that way too.

 

[pubmsu]

I'm using a 2015 topped up 13'' MBP with two 24'' Dell 4K in native resolution (3840 x 2160) in clamsehll mode for coding. Everything seems work fine. Only lag experienced was when I was re-arranging displays in preferences.

I assume 2018 13'' MBP would perform better than mine.

Does it work as well when not in clamshell mode?

 

[joeybeninghove]

I'm using a 2015 topped up 13'' MBP with two 24'' Dell 4K in native resolution (3840 x 2160) in clamsehll mode for coding. Everything seems work fine. Only lag experienced was when I was re-arranging displays in preferences.

I assume 2018 13'' MBP would perform better than mine.

How are you running 2 4K displays on a 2015 MBP? Even though it has 2 DisplayPorts, I thought it could only drive 1 4K display at 60Hz (a 2nd one would have to be at 30Hz over HDMI). I've tried getting 2 4K displays working on my 2015 15" MBP, both using DisplayPort without success.

Curious?

 

[Samuelsan2001]

How are you running 2 4K displays on a 2015 MBP? Even though it has 2 DisplayPorts, I thought it could only drive 1 4K display at 60Hz (a 2nd one would have to be at 30Hz over HDMI). I've tried getting 2 4K displays working on my 2015 15" MBP, both using DisplayPort without success.

Curious?

I’d imagine they are running at 30hz it makes no difference for coding.