One of Dell's new Thunderbolt monitors is aimed right at Apple's Studio Display

Just before the CES festivities kick off, Dell has rolled out a pair of large-format curved displays, with one running at 5K and 120Hz off a single Thunderbolt cable.

Dell's first monitor, released Thursday, was the 40-inch 5K U4025QW display. It has a 120Hz refresh rate, with a 5120x2160 resolution on a curved screen, and a built-in ambient light sensor adjusts screen brightness. Dell also says it reduces blue light exposure with a more advanced LED backlight than the previous 5K display discontinued long ago.

While similar to the Studio Display, it has a lower pixel density versus the 27-inch 5K panel in Apple's offering.

Dell says the monitor has a 2000:1 contrast and a 178-degree viewing angle. It has DisplayHDR 600, which covers 99% of the DCI-P3 gamut and 100% of the sRGB gamut.

Thunderbolt connectivity gives the monitor a few extra features. The monitor is also effectively a Thunderbolt 4 hub, with multiple ports.

• 2.5 Gigabit ethernet jack on the back
• Four 5 gigabit USB-A ports on the back
• Two USB-C ports on the back
• One USB-C port and one USB-A port on a pop-out port extender facing the user
• 140W power delivery to a connected computer

There is also a DisplayPort 1.4 port and a HDMI 2.1 port. Dell isn't clear if these are on the Thunderbolt hub aspect of the port, but given that the technical specs mention picture-in-picture, these are likely alternative inputs.

The U3225WE is smaller at 34 inches. It also has a much lower pixel density than Apple's Studio Display, running at 3440x1440 resolution. It, too, connects with Thunderbolt but lacks front-facing ports.

DisplayHDR is missing on the U3225WE but has 100% sRGB and 98% of DCI-P3 gamuts. It also has a 2000:1 contrast ratio with a 178-degree viewing angle.

Port connectivity is similar to its larger cousin, but power delivery is limited somewhat to 90 watts to a host device. This is still enough to power a 16-inch MacBook Pro under heavy load, but the battery won't charge very quickly.

The larger U4025QW retails for $2399. The smaller U3425WE sells for $1019. For comparison, the Apple Studio Display retails for $1599 with standard glass and $1899 with textured glass.

Both models will be available on February 27.

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