Technical Retina Macbook Pro Questions

Discussion in 'MacBook Pro' started by TyleRomeo, Jun 12, 2012.

  1. TyleRomeo macrumors 6502a

    Mar 22, 2002
    New York
    It may be too early for some of these questions but lets give it a shot.

    1. Are each of the Thunderbolt ports on their own bus or are they sharing one bus?

    2. Are the Thunderbolt ports running PCI Express 3.0 or 2.0?

    3. Are each of the USB 3 ports on their own bus or are they sharing one bus?

    4. Is the HDMI port a 1.3 or 1.4?

    5. What is the capacity left of the stock 256GB SSD when you first started your new Retina Macbook Pro? 215GB?

    Thanks to all those lucky ones who already have the new machines.
  2. Stetrain macrumors 68040

    Feb 6, 2009
    All I can really answer is the Thunderbolt question. Since both Thunderbolt ports support display output, the controller chip is either a Light Ridge or Cactus Ridge controller.

    Both of those chips provide 4 Thunderbolt lanes, two per port.

    The non-retina Macbook Pro uses the Light Ridge chip as well (known from previous gen teardowns), but it only had one physical port.

    I don't think that either of these chips are using PCI-E 3.0. Intel has announced that they will bring PCI-E 3.0 to Thunderbolt but no timeframe yet.
  3. Xcelerate macrumors regular

    Jul 11, 2008
    I'm not positive but I think it's 1.4. Someone on here was mentioning that 1.4 requires putting having an actual port on the laptop and paying fees to a committee ... something to do with branding.
  4. dagamer34 macrumors 65816


    May 1, 2007
    Houston, TX
    1. They should be on their own bus.
    2. Doesn't matter as the Thunderbolt chip and cables have their output fixed at 10Gbps bidirectional.
    3. Ivy Bridge chipset supports 4 USB 3.0 ports each on their own separate bus. It's not a hub.
    4. No reason for it not to be 1.4, but there are almost no benefits anyway, unless you plan on outputting to a 4K display anytime soon (and even then, only at 24Hz).
    5. Can't answer.
  5. TyleRomeo thread starter macrumors 6502a

    Mar 22, 2002
    New York
    Thanks guys for clearing things up. I'm reading that most of the issues are now with scrolling with the Retina display at 1680x1050 or 1920x1200. I hope they iron out that issue soon.
  6. chx1975, Jun 14, 2012
    Last edited: Jun 14, 2012

    chx1975 macrumors newbie

    Jun 13, 2012
    Why does Apple claim only two external displays? This is extremly baffling. I am fairly sure the Kepler family can drive four displays, we know it can do three (Apple claims internal + two external), we know Light Ridge multiplexes two DP signals on one cable. I would expect two per port and if you do four then the internal shuts down (like the Air with two).

    Edit: I think I got it. I presumed the two ports meant there are two TB controllers and so four displays but it ain't so,3205-3.html says both Cactus Ridge (which is used per ifixit, they found a DSL3510L) and Light Ridge only got two DP. The signalling for this boggles my mind but -- apparently, this is how it is. I truly wonder whether it'd been so difficult for Apple to allow the HDMI to be the third but I guess they didn't want that because they only have a TB display. So I guess plugging in an alien ;) HDMI cord will force one of the DisplayPorts into DP++ mode and deliver a DVI signal that way.

Share This Page