Best answer: Yes, the Surface Pro 7 supports dual 4K external displays with up to a 60Hz refresh rate. Depending on the hardware you have at hand, there are a few solutions to achieve this setup.
Connectivity changes for the future
Not a lot has changed physically for the new generation, but the Surface Pro 7 has had its Mini DisplayPort replaced with USB-C 3.1, allowing for more versatile connectivity that's better suited for the future. Many external devices and accessories are going the way of USB-C, and previously the Pro laptops did not have a native way to connect.
As discussed in a Microsoft Mechanics video that details the features of the new Surface devices, the USB-C 3.1 port on the Surface Pro 7 can drive dual 4K displays at a 60Hz refresh rate. This leaves the Surface Connect port free for straight charging without the need for an aging Surface Dock, and it leaves the USB-A port open for connecting something like a USB hub.
In an enlightening post from Dan S. Charlton's blog, it's made apparent that connecting dual 4K monitors via USB-C and hitting the 60Hz refresh rate requires some additional or specialized hardware due to the Pro 7's native support of DisplayPort 1.4. To achieve this setup, you have a few options.
The easiest solution, and likely the one that most people will opt for, is adding an adapter. The only issue here is that there will be a bit of latency, though not enough to disrupt regular operations. If somehow you were planning on using a Pro 7 to game on dual 4K displays at 60Hz you would have a problem, but this isn't really a realistic scenario. We recommend checking out Plugable's USB-C to DisplayPort or USB-C to HDMI adapters. Both also add an Ethernet port into the mix for wired internet connectivity.
Alternatively, you can wait for the future expected release (late 2019 or early 2020) of some USB-C adapters that natively support DP 1.4 and Multi-Stream Transport (MST). One option from Cable Matters is listed on Amazon, though it's not yet available to buy.
There's also the option of investing in a monitor that natively supports DP 1.4 MST up (through DisplayPort or USB-C) and DP 1.2 or 1.4 down in order to start a daisy chain. The second monitor only needs to run DP 1.2 or DP 1.4 in order to connect back to the first display. Unfortunately, monitors that can act as the first in a daisy chain are currently tough to find, though it's expected that many new monitors with native support built in will also be coming in the future.
What about a docking station?
With the Pro 7, you have a couple of options for a docking station solution that will still power multiple monitors yet offer extra connectivity. There is the Surface Connect port to which you can connect a Surface Dock, but the official hardware is certainly showing its age. It's capable of handling a single 4K display at 60Hz, or dual 4K displays at 30Hz.
A more modern USB-C solution is Dell's D6000 Universal dock, which has support for dual 4K external displays at 60Hz. Connected to the USB-C port on the Pro 7, you get the advantage of adding four USB-A 3.0, USB-C, two DisplayPort, HDMI, a 3.5mm audio jack, and RJ45 Ethernet. Note that you will no doubt see some latency here, making it not ideal for gaming. For productivity purposes, it should work fine.
What 4K monitor do we recommend?
Until we can get our hands on some 4K monitors capable of a DP 1.4 MST daisy chain setup, one of our favorite 27-inchers — the HP Z27 — is still a great option. Combined with a Plugable USB-C to DisplayPort adapter, you'll be able to connect two of these displays back to your Pro 7 and get the full 4K at 60Hz experience. It has wide viewing angles thanks to an IPS panel, precise color, and an 8ms response time to go along with the 60Hz refresh rate.
Next in the Pro line
10th Gen Intel CPUs and USB-C connectivity
Thanks to a USB-C port taking over for the Mini DisplayPort, you should have no issues connecting dual 4K displays to your Surface Pro 7.
Dual 4K at 60Hz adapter
Connect two 4K displays at 60Hz
This adapter connects to your Pro 7 with USB-C and provides dual DisplayPort ports for connecting two 4K displays. Included is an Ethernet port for wired internet.
27-inch 4K monitors
Thin bezel, stunning picture
Want to get a workstation for your Pro 7 set up ASAP? Grab a couple of these quality 4K monitors and never go back to anything with a lower resolution.
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