Low Performance from Vega 64  

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macbookprouser19
(@macbookprouser19)
Active Member
Joined: 2 weeks ago
Posts: 7
December 3, 2018 8:04 am  

Hello everyone. I am testing certain builds. This is my setup:
Macbook pro 2018 15" + Razer Core X + Sapphire Radeon Vega 64 (SAPPHIRE Radeon RX Vega 64 DirectX 12 21275-03-20G 8GB 2048-Bit HBM2 PCI Express 3.0 CrossFireX Support Video Card)

I am getting only 135,000 Open CL from Geekbench. I looked at the results browser and that is lower than the Vega 56, and very close to the RX 580!
I'm not using any external monitor, this is just plug and play on OS X Mojave. Why am I getting such a low result? Also, when I play world of warcraft I never seem to go above 40-45 fps in 4K. 

Anyone  ran into the same issue as me? Thank you!

2018 MacBook Pro 15'' + LG UltraFine 4k + Razer Core X + pending graphics card that supports USB-C


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macbookprouser19
(@macbookprouser19)
Active Member
Joined: 2 weeks ago
Posts: 7
December 3, 2018 8:15 am  

FYI this is what is giving me the 135,000 score (OPen CL). (I know the vega is working because my internal 560x gets only 59,000)

Sobel  235279 
10.4 Gpixels/sec
 
Histogram Equalization  71559 
2.24 Gpixels/sec
 
SFFT  24444 
60.9 Gflops
 
Gaussian Blur  401257 
7.03 Gpixels/sec
 
Face Detection  35959 
10.5 Msubwindows/sec
 
RAW  751431 
7.27 Gpixels/sec
 
Depth of Field  774379 
2.25 Gpixels/sec
 
Particle Physics  32096 
5074.0 FPS

2018 MacBook Pro 15'' + LG UltraFine 4k + Razer Core X + pending graphics card that supports USB-C


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Johnsavv
(@johnsavv)
Active Member
Joined: 3 weeks ago
Posts: 7
December 4, 2018 6:46 am  

You are loosing performance from not having the egpu hooked up to an external monitor... it is having to loop back through the TB3 to the internal display, try it again with it hooked directly from the egpu to a monitor and I’m sure you’ll see a significant increase

Mac Mini late 2018, i7, 512gb ssd, 32gb ram, Sonnet egfx 550w, amd Vega 56


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theitsage
(@itsage)
Famed Member Admin
Joined: 2 years ago
Posts: 3232
December 4, 2018 5:17 pm  

How are you connecting the eGPU and LG 4K monitor atm? Try connecting the eGPU and LG 4K in opposing Thunderbolt 3/USB-C ports as well as the same side. Run the tests again to see if one configuration performs better.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

86 external GPU build guides


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