How many external displays can I power with the 15" retina MacBook Pro? [duplicate]

I have three 24" (1920x1200) Dells that I would like to use on a single setup. With the 15" retina MacBook Pro having two Thunderbolt ports and one HDMI connector, would it be possible to connect them all up in addition to the built-in display?

Solution 1:

The Other World Computing Blog shows that the new MacBook Pro 15" with Retina Display Can Run 3 External Displays:

MacBook Pro 15 with Retina Display Can Run 3 External Displays

image source: http://blog.macsales.com/

These resolutions were used:

Retina on laptop @ “best for Retina”
iMac used as a display @ 2560 x 1440 via Thunderbolt
iMac used as a display @ 2560 x 1440 via Thunderbolt/DisplayPort
LG monitor @ 1920 x 1200 via HDMI

Quote from the MacRumors news article on that:

This makes the Retina MacBook Pro the first Mac -- other than a tower-based workstation like the Mac Pro -- to natively power four displays simultaneously.

Solution 2:

Yes. Much of the official documentation doesn't explicitly address the HDMI port as adding to the two thunderbolt and built in display, this has been shown to work by several early adopters of the retina MacBook Pro. It's also buried in footnote 4 of answer 11 of the useful omnibus Thunderbolt FAQ

See reviews like for details on resolutions and performance:

http://blog.macsales.com/14241-macbook-pro-15-with-retina-display-can-run-3-external-displays

Solution 3:

From http://www.apple.com/macbook-pro/specs/:

Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, at millions of colors

Solution 4:

Through thunderbolt + HDMI, yes, three is the limit, but you can use the DispllayLink monitors to run smaller (15" or so) monitors through the USB. I should have taken a picture because I'm not set up to really use it, but I successfully plugged in two 1920x1200 (thunderbolt), on 1920x1080 (HDMI) and two 1366x768 (USB) monitors running by my 13" Retina Pro. Just plugged em in. (After downloading the DisplayLink drivers.)