I had Cyberpunk on my Steam Deck when I put it to sleep a couple days ago. I turned it on today, having totally forgot I was in game. I stared at a nightclub on my screen, dumbfounded, as I was expecting the main menu.
I hadn’t even paused the game when I put my Deck to sleep. I just hit the power button and could play instantly. I still had 30% charge from having played earlier because I didn’t even plug the thing in.
What a total shock.
Putting a PC to sleep is going to use power to keep the RAM refreshed but that’s pretty much it. So it doesn’t matter what the PC was doing, it’s not going to have an impact here.
The downside is the PC can’t actually do stuff while asleep while ARM can do things in low power mode like download stuff in the background.