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Do AMD GPUs run Metal Apps Faster under macOS Mojave?

October 5th, 2018, by rob-ART morgan, mad scientist
October 24th: Clarification in 'What Did We Learn'

Will AMD GPUs run faster when you upgrade your Mac Pro tower from macOS High Sierra (10.13.6) to Mojave (10.14)?

GRAPH LEGEND

Vega Frontier - AMD Radeon Vega Frontier Edition
RX Vega 56 = AMD Radeon RX Vega 56
RX 580 = AMD Radeon RX 580
HD 7950 = AMD Radeon HD 7950 'Mac Edition'

TEST MULE was a 2010 Mac Pro tower with dual 6-core X5680 3.33GHz Xeon processors and 96G of 1333 MHz DDR3 memory.

GEEKBENCH METAL GPU COMPUTE

(HIGHER Score = FASTER)

RISE OF TOMB RAIDER (METAL)

A Metal based game, we used the built-in 3 phase benchmark. Settings were High preset at 2560x1440, Fullscreen. (HIGHER Frames per Second = FASTER)

GFXBENCH METAL - AZTEC RUINS HIGH TIER

This cross-platform benchmark measures METAL performance of GPUs. We tested using the new Aztec Ruins High Tier animation at 1080p OFFscreen. (HIGHER Frames per Second = FASTER)

DAVINCI RESOLVE 15 (METAL)

Looping playback of 1080p Candle project while rendering one Noise Reduction node on-the-fly. GPU Processing Mode was Metal. (HIGHER Frames per Second = FASTER)

What did we learn?

macOS Mojave provides little or no performance gain over High Sierra running Metal apps. The only exception was DaVinci Resolve. The graph below reveals that, though the Vegas run GPU Processing faster using OpenCL, the RX 580 and HD 7950 run GPU Processing faster using Metal.

UPDATE: All graphs now show both High Sierra and Mojave results for the Radeon RX 580. Our MSI Armor MK2 model was very quiet compared to the other GPUs. The dual dispersion fans only spin when the GPU is stressed. Even when spinning, they were silent. Signficantly faster than the Radeon HD 7950 Mac Edition and without extreme power requirements, it could be called the 'sweet spot' of Mac Pro tower GPU upgrades.

For 'speed freaks,' the Vega series of GPUs is an even stronger AMD upgrade option, as you can see in the graphs. However, they require more power than the Mac Pro towers provide with the dual 6pin PCIe power cables. We were able to provide supplemental power feeds from the unused SATA connectors in the optical bay and factory drive bay. Not pretty sight. The term, 'Rat Rod,' comes to mind.

We are hoping to soon see NVIDIA Pascal series GPU drivers for macOS Mojave. Why? Because NVIDIA GPUs are fast and support CUDA as well as Metal and OpenCL. We are greedy. We hope NVIDIA will also produce RTX 2080 and 2080 Ti drivers for Mojave.

How fast are the NVIDIA GPUs? Take a look at these Geekbench scores compared to the fastest AMD GPUs:

(NOTE: RTX 2080 and 2080 Ti tested using Windows; TITAN XP and 1080 Ti tested using macOS High Sierra)

Comments? Suggestions? Feel free to email me,
Follow me on Twitter @barefeats

WHERE TO BUY APPLE products:
Go to the Apple Online Store USA. And don't forget to check out Factory Certified Refurbished products.

WHERE TO BUY AMD GPUS
B&H Photo Video sells various brands of AMD Radeon Vega series GPUs (including RX 580, RX Vega 56, RX Vega 64, Vega Frontier).

The Radeon HD 7950 Mac Edition is still available from Other World Computing.

WHERE TO BUY NVIDIA GPUs
B&H Photo Video has various brands of Pascal Series GPUs including the GTX 1080, 1080 Ti, and TITAN Xp. The also have or will soon have various models of the new RTX 2080 and 2080 Ti.

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copyright 2018 Rob Art Morgan
'BARE facts on Macintosh speed FEATS'
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Gfxbench metal

The first unified cross-platform 3D graphics benchmark database for comparing Android, iOS, Windows 8, Windows Phone 8 and Windows RT capable devices based on graphics processing power. What does GFXBench Metal do? GFXBench is a comprehensive cross-platform and cross-API 3D graphics benchmark that measures graphics performance, long-term performance stability, render quality and battery with a single, easy-to-use application. A couple of days ago, Kishonti released its new GFXBench version made especially for Apple and their low-overhead graphics framework “Metal”. As they say, the Metal edition was the next in line of. GFXBench Metal is now available on El Capitan, allowing performance measurement of Metal on OS X and comparing results to Open GL performance on OS X and also to iOS devices. The Metal edition is the latest in the line of GFXBench API ports, which further enables multi.

Gfxbench Metal

GFXBench 4.0 GFXBench 5.0 3D Graphics Performance of Meizu M57AC Blue Charm Metal.