4K Display - how much RAM is left?

[MRrainer]

As I understand it, like all M chips, the „VRAM“ comes from RAM.
I have a 2018 MacMini with 2 4K Displays - but it has 32g RAM.

So how much RAM is there actually „left“ for apps with a 4K display?

Better to buy an M4 MacBook Air?

 

[Basic75]

One UHD framebuffer needs 3840 * 2160 * 4 bytes which is about 32MB. With two displays that makes 64MB, with double or triple buffering you need to double or triple the number. At worst that's 192MB which is not much more than 2% of an 8GB MacBook Neo.

 

[MRrainer]

One UHD framebuffer needs 3840 * 2160 * 4 bytes which is about 32MB. With two displays that makes 64MB, with double or triple buffering you need to double or triple the number. At worst that's 192MB which is not much more than 2% of an 8GB MacBook Neo.

OK, so it doesn't matter much in practice.
Good to know, thank you.