That would be a decent step for a Mac Pro. Still tough for Apple. If they were able to get a supply of Vega 20s, that would be a slam dunk for Apple.
The early Vega20 GPU will likely be sold as
Radeon Pro or
Radeon Instinct cards. AMD is probably going to sell them at a higher mark up than Apple will ( if repeat the "pro" card pricing Apple did with the Mac Pro 2013. ) . If the supply is limited AMD probably isn't going to want to cut into their own margins.
But is also illustrative of why having a standard PCI-e slot for a compute card would be useful. If Apple did the driver and Metal/OpenCL stack work to make it work seamlessly in macOS that would be the value add.
Especially if they wanted to differentiate against the iMac Pro and really push the Mac Pro into a special category.
The Vega GPUs in the iMac Pro are choked down 100-200W from normal baselines. If can add that back with a larger, but hardly any more noisier cooling subsystem coupled to a twice as large power supply they would have differentiation. AMD's Perf/Watt probably isn't going to radically change with Vega20. I highly doubt it is going to be a free pass for them in competing with Nvidia. If Nvidia is off the books because they won't cooperate with Apple doing a custom "Pro" card then can't skimp on power. The iMac Pro does a good enough job, but for upper edge cases one of the primary things they need is simply a bigger power budget.
Vega GPU going to throw 20+ hour rendering work at and it stays "whisper quiet" would be differentiation.
A slot into which could through a Nvidia CUDA proprietary compute card into ... again that would be clear differentiation.
I worry that Apple pushing out just another Intel (or even AMD) box with Vega is not going to make a splash worthy of how long we've had to wait.
"splash worthy" isn't among Apple's primary problems with the Mac Pro.
1. Timely updates to Mac Pro configurations to track both tech changes and to show Apple's active engagement. In short, Apple needs to do something one regular basis. The new Mac Pro needs to support that for the amount of effort/resources Apple is going to assign it. "Incredible" splash every year or every two years was not the problem. No visible effort at all (let along splash) for 3-4 years is a problem.
I not sure how they think they can perpetrate some fraud that they have to super hard at work for 4 years doing something. They probably haven't been. Trying to fake they were isn't going to fool a substantial number of customers. More than few have already left. Apple needs to stop the bleed not blow alot of smoke.
2. What people who are holding out on Mac Pro 2008-2012s want isn't really exciting. Most want a place for the stuff they already bought. Either drives , GPU cards , audio or video capture cards, higher end networking card, etc. For some stuff Apple probably won't do ( 5.25" drives , firewire ) and some many not provision as much ( PCI-e slots , 2.5" drives , etc. ), but they need to do something along those lines. The people more than content to leave that stuff behind probably bought either a MP 2013 or an iMac Pro. That is
not who is left still circling the airport.
Apple is going to want some twist or unique spin on the workstation tower formula. There are good ways that could go with stuff like specialized Vega hardware, and bad ways that could go like "We made is a pyramid!"
Apple has this problem.... articles like this (and many threads on numerous tech discussion sites )
https://www.imore.com/retro-review-2009-mac-pro-2018
First, it is the overall trend that folks are staying on baseline systems longer. Apple isn't immune. They need a Mac Pro that can be bumped up over time. It isn't a specialized Vega this year and then hide in Rip Van Winkle mode for 2-3 years and then do another specialized. They need to iterate and also open some slight opening for other computational (not necessary boot display ) iteration.
The 2009 is on the vintage list. The 2012 is going onto the vintage list this year too. The need a path for folks to jump off. Once the officially supported macOS updates stop those folks will move to Windows (and its associated hardware) increasingly more often.
I have a really hard time believing Apple would want to sit out Vega M, but I haven't looked at the thermals on that to see if it's even an option for the MacBook Pro. Maybe you'd know.
I haven't seen any details on thermals. For the public materials it looks like Radeon Vega Mobile GPU will be alot like the Vega that is attached to the Intel CPU in that package mash-up. Perhaps bigger HBMv2 stack ( 4 GB instead of perhaps 2GB. ) but same general range.
It should be an option for the MacBook Pro 15" if only because probably get some logic board space back with the single HBMv2 stack versus multiple GDDR5 chips.
I thnk some folks think you'll magically get a Vega into the MBP 13". That I'm not so sure about. There is really no "extra' board space now so "smaller footprint " GPU to replace a "bigger footprint" one isn't a tradeoff to make. Even a bigger CPU package (with the dGPU fused in ) has substantive doubt.[/QUOTE]