Somewhere above 720p upscaled to 1080p with the help of FSR should work for 60 fps. The lower render resolution is likely enough to compensate for the lack of VRAM. This is all theoretical, of course.

How’s your CPU situation?

Bit late, but in theory, it should work just fine, even at 60 fps, given that the Steam Deck’s display resolution is only about half of 1080p.

Use supersampling. Either at the driver level (works with nearly all 3D games - enable the feature there, then select a highest than native resolution unital) or directly in games that come with the feature (usually a resolution scaling option that goes beyond 100 percent). It’s very heavy on your GPU depending on the title, but the resulting image quality of turning several rendered pixels into one is sublime. Thin objects like power lines, as well as transparent textures like foliage, hair and chain-link fences benefit the most from this.

Always keep the limits of your hardware in mind though. Running a game at 2.75 or even four times the native resolution will have a serious impact on performance, even with last-gen stuff.

Emulators often have this feature as well, by the way - and here, it tends to hardly matter, since emulation is usually more CPU-bound (except with very tricky to emulate systems). Render resolution and output resolution are often separate. I’ve played old console games at 5K resolution, for example. Even ancient titles look magnificent like that.