How bad are these crashes? Occasional? Or completely unstable?
Great scores are completely pointless if they don't translate into actual performance in the apps/games you want to use...
I don't have frequent crashes, I get occasional crashes usually after sleep wake. If I refresh the finder window it seems to take care of it. Most of the time it wakes fine and runs perfect.
These benchmark scores do translate the open CL apps show compute and or rendering performance (most apple apps), the Uningine and cinebench are for openGL or gaming performance. They are synthetic but do a good job of laying out the capabilities. The Frontier Edition runs the BruceXtest in 12.5 seconds FCPx.
Its similar to the RX 480 in the early Sierra betas. The RX 460 had early support and the RX 480 support came later and progressed nicely. Vega like the RX 460 has its own set of drivers the 1000controller and the 5000kext have 5 different IDs so it looks like full testing support for now. At present we only have 2 of those IDs tested. 0x68631002, and 0x687F1002. That leaves 3 more to go Vega 56 0x68601002? So it looks like at least 2 other Vega cards to go.
Some of these crashes can be related to the software, for example Uningine worked but then after an update it didn't, then the next update fixed it. There are also app compatibility issues, some apps are written for Sierra and may not like High Sierra and the build number scheme. Ive used Nvidia cards in High Sierra gt210, gt710 and have had the same app crash issue, it is random and infrequent but seems to be the safari 11 beta that is causing it for me. Ill load Steam and have my son bang out some games and report.
Update: Steam is working great, Prey on high settings with no crashes on pentium g3258.
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There's also the 30 bit ARGB2101010 vs 24 bit ARGB88888 color scheme and driver support. I've noticed my pentium which can't get IGPU accelerated graphics will only get 24 bit color and Apps work great, my Skylake gets 30 bit color and has some of the crashes and openGL issues. The 30 bit is more buggy but that is understandable its a newer color platform and the drivers are more complex.
These drivers are changing as are the windows drivers, the card has been out for 2 weeks now it will take some time for the Ubuntu linux drivers to mature and translate to OS changes. I just did a WINDOWS 10 Vega driver update and it upped the compute score (miner update), in a few months we should know what these cards can handle..