VideoCardz scored some photos of the final design of MSI's Radeon RX 5700 MECH OC, you can view the pictures over here. The card has a dual-slot design and uses a dual-fan cooling solution:
The MECH RX 5700 is a dual-slot and dual-fan design. The card pictured below is factory-overclocked, but at the time of writing the clocks were unconfirmed. This model offers the same connectivity options as the reference model: 3x DisplayPort 1.4 and 1x HDMI 2.0.