What does a fully enabled GPU mean?

As the title says, what is a fully enabled GPU?

AMD pulled out all the stops on the RX 6900 XT. It has a fully enabled Navi 21 GPU, which helps account for its scarcity.

source: https://www.tomshardware.com/reviews/best-gpus,4380.html

Solution 1:

Silicon is prone to defects which means that areas of circuitry sometimes does not work as intended. Either they don't work well at high speeds, in which case a manufacturer will clock them down, or entire sections will simply not work at all.

GPUs though have an upside. They are essentially a large set of repeated circuits and a failure in one set does not render the entire unit useless. That failed section, so long as it is not a critical area, can simply be disabled and rendered useless.

Perfect silicon will have all sections and cores usable with no disabled sections.

Imperfect silicon will have one or more cores disabled, the more cores disabled the lower the part ends up in the range.

Basically the manufacturer will make one intended part and then "bin" each part according to what clock speeds it can manage or how many cores have to be disabled. This simplifies manufacturing and reduces waste, while maximising profits.

Solution 2:

I actually think the accepted answer is, in this case, wrong.
There is nothing wrong with the answer in general, but in this case it doesn't apply.

The linked article places this in the context of GPU's that have artifical restrictions to make them less attractive for crypto-currency mining.
NVidia and AMD have done this to several high-end GPU's because the crypto-guys were buying every GPU they could find which made high-end GPU's even more scarce than they already were and which greatly inflated prices.
(These restrictions don't affect the use of these cards for gaming.)

This RX6900XT has no such restrictions and is therefore more attractive (and thus scarce due to high demand).