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Apple M1 Ultra

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Re: Apple M1 Ultra

#52
post #15

Are the neural engines actually used for anything, to anyone's knowledge? Edit: Apparently in iPhones, they are used for FaceID.

CoreML models may run on them to macOS's discretion. If you manage to get your neural network in CoreML's format you may use it.

Re: Apple M1 Ultra

#53
post #35
post #4

Looks like all the people saying "just start fusing those M1 CPU's into bigger ones" were right, that's basically what they did here (fused two M1 Max'es together). And since the presenter mentioned the Mac Pro would come on another day, I wonder if they'll just do 4x M1 Max for that.

>I wonder if they'll just do 4x M1 Max for that. They'll be running out of names for that thing. M1 Ultra II would be lame, so M1 Extreme? M1 Steve?

M1 Magnum XL

Re: Apple M1 Ultra

#54
post #4

Looks like all the people saying "just start fusing those M1 CPU's into bigger ones" were right, that's basically what they did here (fused two M1 Max'es together). And since the presenter mentioned the Mac Pro would come on another day, I wonder if they'll just do 4x M1 Max for that.

They might have to have the unified memory more dense to get to 1.5 TB max of RAM on the machine (also since this would be originally shared with a GPU). Maybe they could stack the RAM on the SoC or just get the RAM at a lower process node.

Re: Apple M1 Ultra

#56
post #20

I'm cross posting a question I had from the Mac Studio thread (currently unanswered). ---- Mac Pro scale up? How is this going to scale up to a Mac Pro, especially related to RAM? The Ultra caps at 128 GB of RAM (which isn't much for video editing, especially given that the GPU uses the system RAM). Today's Mac Pro goes up to 1.5TB (and has dedicated video RAM above this). If the Mac Pro is say, 4 Ultra's stacked tog…

I think some of this can be guessed from the SoC codenames

https://en.wikipedia.org/wiki/List_of_Apple_codenames

M1 Max is Jade C-Die => 64GB

M1 Ultra is Jade 2C-Die => 128GB

There is a still unreleased SoC called Jade 4C-Die =>256GB

So I think that's the most we'll see this generation, unless they somehow add (much slower) slotted RAM

If they were to double the max RAM on M2 Pro/Max (Rhodes Chop / Rhodes 1C), which doesn't seem unreasonable, that would mean 512GB RAM on the 4C-Die version, which would be enough for _most_ Mac Pro users.

Perhaps Apple is thinking that anyone who needs more than half a Terabyte of RAM should just offload the work to some other computer somewhere else for the time being.

I do think it's a shame that in some ways the absolute high-end will be worse than before, but I also wonder how many 1.5TB Mac Pros they actually sold.

Re: Apple M1 Ultra

#57

Didn't AMD do something similar with putting 2 CPU chips together with cache in-between? What's the difference here in packaging technology? (maybe there is no shared cache here)

AMD is currently shipping high-end CPUs built with up to nine dies. Their ordinary desktop parts have up to three. They are not built with "cache in-between". There is one special I/O die but it does not contain any cache. Each compute die contains its own cache.

Re: Apple M1 Ultra

#58

> M1 Ultra features an extraordinarily powerful 20-core CPU with 16 high-performance cores and four high-efficiency cores. It delivers 90 percent higher multi-threaded performance than the fastest available 16-core PC desktop chip in the same power envelope. Maybe not a huge caveat, as 16-core chips in the same power envelope probably covers most of what an average PC user is going to have, but there are 64-core Thre…

Is that Threadripper in anything like the "same power envelope"?

If I'm reading the graph in the press release right, M1 Ultra will have a TDP of 60W, right? A 3990X has a TDP of 280W. I know TDP != power draw, and that everyone calculates TDP differently, but looking purely at orders of magnitude, no, it's not even close.

Re: Apple M1 Ultra

#59

Haha, bloody hell, what a monster of a chip. I find my M1 Max already remarkably fast. The change is so huge. It's like in the old days when you'd get a new computer and it felt like it could do things before you could think of doing them. But surely the GPU things can't be real? The GPU in the M1 Ultra beats the top-of-the-line Nvidia? That's nuts.

the problem on mac is the super tiny game selection

Re: Apple M1 Ultra

#60
post #9
post #7

I wonder if the max 128GB graphics memory opens up some applications that would not have been viable before?

Not really. Thanks to the GPU interconnect NVLINK we have system 320GB. https://www.deltacomputer.com/nvidia-dgx-a100-320gb-3ys-edu.... There are even some with 640GB. This is at a different price point though.

640GB should be enough for anyone.
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