How many of you have used multiple GPUs config. like x-fire or SLI. What for?

Used 2 nVIDIA GTX 1080 Ti as SLI, rendering my cat ear wielding AI waifu gf who responds to any and all commands I issue to her and usually responds with uWu. And I only paid $2999 for the setup.

Oh shit, this is a public forum....

Yeah I used it to run Crysis at 4K 120 FPS at Ultra settings, also used for CoD MW2 at the same settings.

SLI is dead. A few people use multiple 3090s and 4090s for AI.

I used to have two 980s on SLI, just because I happened to pick up a spare one from work.

Mainly used it for gaming, but can't say it made much difference. Most certainly it's not a 2x bump as many believe. More like a 1.25x or so, so not really worth it, hence why it died.

there was a brief period in time where it actually provided measurable benefits.

but mostly, it's just for bragging rights.

Mining crypto, dedicating one to gaming when needed

ML training, but that's just multiple GPUs - not SLI.