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Again, as I stated, it depends on the monitor and how it is wired. If the monitor uses MST to drive two virtual 1920x2160 monitors, then 60hz is possible. If it uses MST to support daisy-chaining, and thus, must drive the full 3840x2160 on a single one of those lines, the maximum is 50hz.

Your Dell up2414q is one of the former. You'll notice it doesn't have a displayport out for daisy-chaining.

Exactly: 2 virtual with MST as a single 4K with no daisy chaining @ 60 Hz.

About the rest: you're right, of course.
 
Clearly you have not used the 2014 Mac mini.

The dual core i7 does quite a bit of work.

Quad core does twice as much under ideal conditions. Under non-ideal conditions, I think power users can really benefit from having 4 cores, especially those who run a VM or two.
 
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My mid-2012 Retina MacBook Pro with Intel Graphics 4000 and Nvidia GT 650M drives my Dell UP2414Q at a beautiful 3008 x1692 at 30HZ. The UP2414Q is a gorgeous, ultra-crisp display that will get even better when I buy the next-gen MacBook Pro. (I do not do games.)
 
I just got myself my new 13 inch rMBP, 16gb ram/512gb, and was wondering what u could power with this thing.

Since i have 2 tb2 ports, i should be able to run 2 external 4k screens at 60hz.

But what about 2560x1440 screens like the cinema display, could i run 4 of them via daisy chaining? Or whats whith those extra wide 1440p screens from LG, would i be able to run three of those and if yes, how would i connect them to the macbook pro?

In anycase it's a great laptop with an amazing ssd (blackmagic reported 1.4gb/s read/write)...
 
Why they still call this model the Air when the macbook is thinner and lighter?
 
BTW, it is still laggy on Yosemite... ;)
In System Preferences > Accessibility >Display > Select 'Reduce transparency'. Makes a huge difference, for example when dragging windows.

Which interface are you using? HDMI? Displayport?
UHD @60 hz can only run on Display Port since the rMBP's HDMI is 1.4 and therefore limited to 24 Hz max.

Do most 4k displays have a mini display port? If not, does that mean you could not use HDMI to mini-display port and achieve 60hz?
They will probably have DP and / or HDMI 2.0, usually both. For example my Philips 40" 4K UHD monitor has both and that's one of the cheapest UHD monitors around.
 
In System Preferences > Accessibility >Display > Select 'Reduce transparency'. Makes a huge difference, for example when dragging


I know about that, but I strongly believe, that there should be no lag in the UI, not to mention on a machine of that performance an price.

Sad direction Apple is moving along these days: from professional brand to "pro-fashionable" one...
 
Once there's a second USB Type-C port added to next year's retina MacBook, all is forgiven.

I've been waffling all over the place about which laptop to get (I'm on a 2011 MBP, which, bless its heart, is still working, but isn't the lightest travel companion). I'm thinking that it makes sense, if the machine doesn't fail, to see what the next "generation" is. If I had to pick right now, I'd go for the 11 inch Air.

I'm still planning on getting to the store when the new machines are in, and compare the MBA, the new Macbook and the new 13" MBP, but all the confusion I'm experiencing is keeping me from making a buying decision, even though I likely have a year to wait for anything new on the MBA or Macbook front.
 
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