There's no vram. It's unified / shared memory. There's no M1X. There's M1 Pro and M1 Max

I think we can safely shorten them to M1P and M1X.

Can't allow that. Either M1P and M1M or M1O and M1X.

M1 Pro & Max (and plain M1 too for what it's worth) have unified memory across both CPU and GPU. So depending on the model it'd be up to 32gb or 64gb (not accounting for the amount being used by the CPU). Put differently - far more than 3070 and 3080.

The memory is unified, and very high bandwidth. No idea what that means in practice, guess we'll find out.

It's very high bandwidth for a CPU, but not that great for a GPU (400GB/s vs 440GB/s in 3070 and 980GB/s in 3090).

It's not quite apples to apples. The 3070 only has 8GB of memory available, whereas the M1 Max has up to 64 GB available. It's also unified memory in the M1 and doesn't require a copy between CPU & GPU. Some stuff will be better for the M1 Max and some stuff will be worse.

>> ...not that great for a GPU...

* almost equals the highest laptop GPU available

But it's also a premium product, so it matching a 3070m isn't really above what you'd expect for the cost (but efficiency is another story)

On the other hand, it's zero-copy between CPU and GPU.

Of course, with a 3070 and up you have to play with headphones so you don't hear the fan noise.

This is the best feature of the new Apple CPUs if you ask me: silence.

Now to wait for a decent desktop...

the memory is unified so whatever ram is on there (16,32,64) can be allocated as vram.

That's why during the presentation they bragged about how certain demanding 3d scenes can now be rendered on a notebook.

I still didn't get their example about the 100Gb spaceship model - max RAM supported is 64Gb...

Up to 64GB…