Benchmark for using two eGPUs in a game ...
 

Benchmark for using two eGPUs in a game (Ashes of the Singularity)  

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OliverB
(@oliverb)
Noble Member

Actually it's quite possible and makes perfact sense to use multiple (e)GPUs in a game. A good example is Ashes of the Singulary, which profits from a multiple GPU setup and not just Crossfire/SLI:

To use it, check "Enable Multiple GPUs" in Video Option:

EnableMultipleGPUs

The result is good. For 1440p Preset High the FPS could be increased from 46.2 to 56.7 FPS. This wasn't the only win, the CPU had less work to do and thus the MacBook didn't heat at much. Here is the detailed result:

  Radeon RX580 Radeon  RX580 + RX570

Ashes of the Singularity

1440p Preset High

AotS RX580 1440pHigh

AotS RX580 RX570  1440pHigh

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680

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Posted : Feb 5, 2019 6:13 pm
OliverB
(@oliverb)
Noble Member

Of course, with 2 GPUs there are 4 combinations:

First eGPU One eGPUS Two eGPUs
RX 580 46.2 56.7
RX 570 37.6 54.6

When combining two cards that are quite different there is not always an improvement, see RX570 and GTX1080Ti

This post was modified 4 months ago

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680

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Posted : Feb 5, 2019 8:31 pm
theitsage liked
theitsage
(@itsage)
Famed Member Admin

Thank you for sharing this feature of Ashes of the Singularity! I wish more games and software took advantage of external and multiple GPUs.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

94 external GPU build guides

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Posted : Feb 6, 2019 11:28 pm
Joikansai and OliverB liked
OliverB
(@oliverb)
Noble Member

It's also possible to combine two completely different GPUs, here I combined RX570 and GTX780Ti (can they be more different?)

 

First eGPU One eGPUS Two eGPUs
GTX 780 Ti 42.9 54.2
RX 570 37.6 52.9

They shouldn't be very different in terms of performant, though.

AotS GTX780Ti RX570 1440pHigh

This post was modified 4 months ago

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680

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Posted : Feb 6, 2019 11:58 pm