The RX 5700XT performs slightly faster than an RTX 2070, while using a significantly smaller GPU. Imagine the performance we'd see if AMD made a card using a much bigger Navi GPU.. :
RX 5700 XT @OC vs RX 590 Crossfire @Stock vs RTX 2080 @Stock | (Crossfire Supported Games Only) - YouTube
SLI vs CrossFire: Are Multi-GPU Setups Worth it in 2020?
AMD Radeon RX 5700 and 5700 XT review: Blazing new trails - PC World Australia