not unified memory tho

It is unified memory on this one

From the spec sheets I’m looking at, it is not. I’m seeing models of the Dell Pro Max with 128 GB of DDR5-6400 as CAMM2, then a separate memory of up to 24 GB on the GPU. CAMM2 does not make the memory unified.

There are also SO-DIMM options.

You're not looking at the right thing. Dell's naming is horrible. Dell Pro Max with GB10 (https://www.dell.com/en-us/shop/cty/pdp/spd/dell-pro-max-fcm...). It's a very different computer than what you're looking at and has 128GB LPDDR5X unified memory.

Thanks for pointing that out. I found a more informative article about that model at https://www.mcpgov.com/dell-pro-max-gb10

my bad

I took ~ to be a "singing tone" for some reason till I saw sibling and realized it might be an attempted strikethrough xD

That won't hold much benefit as SOCAMM2 and LPCAMM2 get more popular.

Not quite, what is the vRAM bandwidth of each? The bandwidth is a huge contributor to LLM performance.

AFAIK, for the unified bandwidth, it depends mostly on the CPU, for M4 Max (I think it's the default today?) it does ~550 GB/s, while GB10 does ~270 GB/s, so about a 2x difference between the two. For comparison, RTX Pro 6000 does 1.8 TB/s, pretty much the same as what a 5090 does, which is probably the fastest/best GPUs a prosumer reasonable could get.

Granted, it won't be competitive against the flagship dGPUs. Nevertheless, that ~2x is a pretty huge difference in similarly priced offerings.

> So pretty comparable.

The Mac Studio almost certainly uses at least half the power

(educated guess, I'm too lazy to go look at all the spec sheets and run the numbers)

It's actually reversed. The GB10 chipset has a TDP of 140w, whereas M2/M3 Ultra pulls over 250w from the wall: https://support.apple.com/en-us/102027

> It's actually reversed. The GB10 chipset has a TDP of 140w, whereas M2/M3 Ultra pulls over 250w from the wall

Come on mate ... I think you and I both know I was talking about complete system here, not discrete components.

I'm pretty sure your total package (Dell Pro Max + GB10) will pull more from the wall.

I'm pretty sure you need to look up what you're talking about instead of making a guess.

The Dell Pro Max PSU + enclosure is only rated for 240w, it literally can't pull more than 250w from the wall without shorting itself.

> 240w

280w according to the spec sheet I just looked at.

Also just look at the graphs on Geerling's website. The Mac Studio eats the Dell for breakfast in a number of the tests: https://www.jeffgeerling.com/blog/2025/dells-version-dgx-spa...

Unfortunately the GB10 is incredibly bandwith starved. You get 128gb ram, but only 270GB/s bandwidth. The M3 Ultra mac studio gets you 820GB/s. (The M4 max is at 410GB/s. I'm not aware of any workload that gets the GB10 to it's theoretical peakflops.

You can't get a 128GB M3 Ultra, it's also more expensive. For some workloads the Studio is better, for others the GB10.