Surface Laptop 3 15-inchSource: Daniel Rubino/Windows Central

Best answer: Yes, the Surface Laptop 3 supports dual 4K external displays. Both the 13-inch and 15-inch models have a USB-C 3.1 port, which allows you to connect the laptop to two 4K monitors at a 60Hz refresh rate with just a single port, but you'll need the right hardware to achieve this setup.

Two 4K monitors with a single port

The Surface Laptop 3 is a thin and light laptop that builds off the already impressive Surface Laptop line. There are now two versions of the Surface Laptop 3, a 13-inch version and a larger 15-inch version. Both sizes of the Surface Laptop 3 have a USB-C 3.1 Gen 2 port. This port allows a laptop to connect to two 4K monitors at once at 60Hz.

A Microsoft Mechanics video shows off how the new line of Surface devices can power two 4K displays at once with a 60Hz refresh rate. Being able to do this with just a single port leaves other ports open, such as the Surface Connect port and USB-A port that are available on all sizes of the Surface Laptop 3.

Unfortunately, getting the Surface Laptop 3 to power two 4K displays at once at 60Hz is not usually as simple as plugging in a USB-C port into your laptop and monitor. As outlined in a post by Dan S. Charlton, connecting two 4K monitors and hitting 60Hz via USB-C requires additional or specialized hardware. This is due to the Surface Laptop 3's support of DisplayPort 1.4. There are a few options to power two 4K monitors at once.

An easy solution is to purchase an adapter. You can buy Cable Matters USB C to DisplayPort Adapter with 8K HDR DisplayPort 1.4. There aren't many adapters that have the required specs to power dual 4K displays at 60Hz, but this one fits the bill.

Another option is to get a USB-C adapter that natively supports DP 1.4 and Multi-Stream Transport (MST). Cable Matters makes the Cable Matters USB C to DisplayPort Adapter with 8K HDR DisplayPort 1.4 which meets the required specs. It also has two DisplayPorts and one HDMI port.

The final option is to purchase a monitor that can handle this level of daisy-chaining. These aren't especially common, but the BenQ's 27-inch PD2700U can handle it. It has impressive color reproduction for professional design work. To use this monitor with the Surface Laptop 3, you'll need to grab an adapter like the Cable Matters USB C to DisplayPort Adapter with 8K HDR DisplayPort 1.4 mentioned above.

13- and 15-inch options available

The Surface Laptop 3.

Microsoft Surface Laptop 3

Get yours while it's hot

The Surface Laptop 3, available in both 13.5-inch and 15-inch configurations, is sure to please anyone looking for a premium Ultrabook.

27-Inch 4K Monitor

BenQ PD2700U

BenQ PD2700U

Professional-grade 4K display

BenQ's PD2700U supports daisy-chaining, allowing you to connect your Pro 7 to a couple of displays with just a small adapter.

DisplayPort 1.4 compatible adapter

Cable Matters USB C to DisplayPort Adapter with 8K HDR DisplayPort 1.4

Cable Matters USB C to DisplayPort Adapter with 8K HDR DisplayPort 1.4

Easy to connect

This adapter supports DisplayPort 1.4 and works with up to 8K HDR (7680x4320). It's also backward compatible with 4K and 1080p monitors.

A simple hub

Cable Matters USB-C Triple 4K DisplayPort MST Hub with Dual DisplayPort and HDMI

Cable Matters USB-C Triple 4K DisplayPort MST Hub with Dual DisplayPort and HDMI

The latest specs

This hub supports 1.4 high-speed HBR3 with a data rate of 32.4 Gbps. It can also charge your laptop at up to 100W.

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