

Most GPUs will have fan spin & lights if only on pcie power (the pcie slot provides 75W without external connection), but then misbehave during display; I know it sounds stupid but make sure the 12V power connector on the top of the card is firmly plugged in, that connector in particular has a reputation for being unreliable.
I used nushell for a good 6 months, it was nice having structured data, but the syntax difference to bash which I use for my day job was just too jarring to stick with.
Fish was (for me) the right balance of nice syntactic sugar and being able to reasonably expect a bash idiom will work.