During CES this year it was clear that one of the overriding themes was external graphics solutions. Intel’s Thunderbolt line of ICs has historically been the source of musings, and we saw first and second generation Thunderbolt enclosures being demonstrated at previous events. Several reasons were given for them not being released, including limited bandwidth and the ability to hot-plug were cited as well as other factors. Third generation Thunderbolt  offers up to 40 Gbps of bandwidth over an active cable, and it sounds like some implementations are now supporting hotplug, meaning that we will see some entering the market. However, ASUS’ implementation is considerably different.

The External GPU Dock, over Type-C

If we look at several items on the market, namely the newly announced GX700 laptop from ASUS with a water-cooled graphics card, or the MSI GS30 series of laptops, or even something like the MSI AIO with an external graphics card - the trend is to pass the PCIe lanes through an interface as if the connection is transparent to the PC. This has a variety of limitations such as hot plug probably won’t be enabled and it requires a reboot to switch between the graphics, but it does provide a stop-gap solution for sure.

The external GPU dock on display from ASUS is a little different again to the laptops and AIO mentioned in the previous paragraph, by taking the PCIe lanes and passing the data over a Type-C interface. Using a proprietary IC, ASUS is able to carry 32 Gbps of data over a passive Type-C cable (note, Thunderbolt 3 is limited to 20 Gbps over passive) to a dock that can decode the data. That being said, there were two data cables going from the dock to the laptop, making me think that this is actually two lots of 20Gbps maximum and the IC logic is there to reconstruct the bits from different PCIe lane data streams.

The enclosure on display we are told is near final, and uses the same Mayan pattern-like design as ASUS’ current range of small gaming PCs. The dock is designed to take any serious single GPU card up to 350W, and because the data comes over PCIe, the card can also be overclocked as if it was directly attached as in a normal desktop. Here’s a video:

So there are a few things worth mentioning. The external dock does need an external monitor to run. Because the dock requires ASUS proprietary technology and only ASUS laptops will have it, we are told that the laptops will carry a mini-DisplayPort input connection, meaning that the GPU can be hooked straight back into the laptop if necessary.  If the dock has sufficient power, it can also be used to charge the laptop via a USB-C charging connector as well, meaning that the laptop does not need to be attached to power when this is occurring.

External graphics is a minefield of coping with errors. If the dock is removed, the system should crash, but the idea here is that a user can simply bring their laptop home and start doing powerful gaming. ASUS is saying that their solution can survive a hot-plug event, merely by causing the program that needs the GPU to close – but each GPU will need to be validated in this environment separately as time goes on. The other element is that if this ends up purely for ASUS laptops, there needs to be a few models (both gaming and business oriented) that can support it. No doubt we will see more as time goes on.

ASUS Booth Tour at CES 2016: 10G Switches A USB Type-C Monitor, the MB169C
Comments Locked


View All Comments

  • WhisperingEye - Wednesday, January 20, 2016 - link

    Panzerknacker- I don't understand why you replied to a phone question with a router question.
  • Xajel - Sunday, January 24, 2016 - link

    The main reason behind this is that most consumer devices hardly sustain the 1Gb connection.. only some extreme consumers like heavy media servers at home that serves multi 4K stream...

    so for a consumer, 1Gb is enough, and there's no devices that can make use of 10Gb for the consumer...

    Some advanced/enthusiast users uses a Link Aggregation connection as a backbone of their network ( NAS -> Switch <- HTPC/Main PC ) so these can serve multi streams in the same time without any drops... but that is rare as 1Gb is enough for most users already...

    Maybe pro users, like pro video editing needs these 10Gb links, but it's already rare situation to see this in a home user, a person with the need for 10Gb ethernet is already using high-end workstations with professional systems.. so it's not a consumer oriented product any more...

    Personally I thought about having 10Gb as a backbone for my home network just to be future proof.. but after looking again.. I found it too expensive, and I can make 2x 1Gb Link Aggregation which much less cost and still serve me well for few years a head ( NAS + HTPC + router + Switch all with LA connections )
  • Lieuchikaka - Thursday, June 2, 2016 - link

  • Lieuchikaka - Thursday, June 2, 2016 - link

  • rhx123 - Tuesday, January 19, 2016 - link

    Using their own standard instead of TB3 just screams of Vendor Lock-In, especially when TB3 can do 36gbps over an active cable.
  • SirKnobsworth - Tuesday, January 19, 2016 - link

    According to Tom's, they actually require 2 type C cables too.
  • Alexvrb - Tuesday, January 19, 2016 - link

    Your statement is ironic to me because thunderbolt is itself... a proprietary standard. For external graphics we really need a standardized "Type G" port or something that can provide all the bandwidth by itself. But that will probably never happen. For that matter, even a much tamer enclosure hosting "only" up to 150W GPUs would still be a huge boost for a laptop.
  • nathanddrews - Tuesday, January 19, 2016 - link

    So... what are the implications of USB-C displacing HDMI and DisplayPort connectors? I know that it technically is DP over alternate mode, but it's clearly very popular. It seems like many new displays have it built in. Adaptive Sync? Latency? Would there be a penalty of some kind for sending video output through the USB bus instead of directly from the GPU?

    My only experience is with a first-generation USB display that sucked immense balls.
  • SirKnobsworth - Tuesday, January 19, 2016 - link

    It's just a multiplexer that sends the signal over unused pins. You only get two lanes (as opposed to the usual 4), but that's fine as long as you don't need 4k60.
  • Ryan Smith - Tuesday, January 19, 2016 - link

    You can get 4 lanes of DP. It just uses up all the differential pairs, so you have to give up USB 3.x to get it (which is why DP 1.3 is going to be such a big deal).

Log in

Don't have an account? Sign up now