The reference card from AMD launches on December 7th for $999 but the real question is how much volume the company will ship. Supply of Navi21 GPUs isn't enough to meet demand so it will most likely be very hard to get your hands on a card unless you want to pay a big premium.
AMD is set to launch its Radeon RX 6900 XT reference SKU on December 8th. The graphics card features 80 Compute Units with 5120 Stream Processors enabled. This is the full-fat variant of the Big Navi that is officially targeting NVIDIA GeForce RTX 3090 in AMD’s own benchmark comparison. The graphics card will officially retail at 999 USD, which is 1/3 cheaper than RTX 3090. It is currently unclear how many cards will be available for sale at launch, but one would guess it won’t be overwhelming.