Above post is probably a scam, the numbers are waaay off. SO, BEWARE!
Back on topic, I cannot change mode for a vega under windows, from A mode to B mode. I already have 20.9.1 driver and I have installed the tdr fix and set compute. I define B, it defaults to A. What do I need to do? Does the page file size matter for this? Also the card is not the main display card.