Difference in Blender

Main issue is super thermally dense boards due to decision to shorten PCB

NVIDIA PG133 Founders Edition board:

Long term problems are very probable.

Small talk from Taiwan

Engineers who worked on RX3080 and RX3090 design told on local closed group chat that thermal design for cards that have FE boards and even less dense custom ones are indeed horrible. And despite that thanks to special throttling and local power management of the main chip they are able to keep its temperature more or less ok - on the board itself it can be areas of too high temperature, especially near VRM and RAM same as in referenced thermal images above.

BGA and memory issues are very probable.

Next thing - Nvidia actually plan shift main focus and promotion on cards with 16GB and more memory. Including 20Gb RX3080 and 24GB RX 3090. All cards with RAM below 16GB will be called "low end and obsolete models" already in 2021. RX3xxx update will focus to bring all memory sizes to 16GB except 1050/1650 level cards. GT1030 replacement also coming with around 3x performance.

GALAX interesting slide

RX 3090 board

Very big thermal density, issue with memory cooling is worse than in RX 3080 already bad case.

Rear memory cooling is terrible.

RTX 3090 consumption

RTX 3080 crashes seems to be hardware related

https://www.igorslab.de/en/what-real-what-can-be-investigative-within-the-crashes-and-instabilities-of-the-force-rtx-3080-andrtx-3090/

On capacitors

Mobile RTX 3070