Tests have shown that the use of the external Nvidia 1080ti improves performance 15-inch MacBook Pro four times as compared to the integrated graphics Radeon Pro 450.
The team eGPU.io tested the performance of the MacBook Pro with an external Nvidia graphics card for desktop computers. To connect the graphics module used a special box that connects to the laptop via Thunderbolt interface 3. Of course, the throughput of this interface is much lower than the PCI Express ×16. But it was sufficient to four times to increase performance “Proshka”.
The best performance in the benchmark Luxmark amounted to 3.1 5822 points for configurations with Radeon Pro 450 and 6056 glasses is with Radeon Pro 460. Using an external graphics card Nvidia GeForce GTX 980 Ti delivers a result in 22 673 points, and with Nvidia GeForce GTX 1080 Ti — 23 172. The latest Nvidia Titan Xp is not yet available for testing.
Other tests show a similar increase in speed. In Valley 1.0 laptop graphics Radeon Pro 450 scored 706 points, and with Nvidia GeForce GTX 1080 Ti — 2353 points. If you use an external display, the result gets even higher — 3031 score.
In the Heaven 4.0 benchmark the laptop with Radeon Pro 450 showed 360 points, with external graphics card — 1422. Attaching an external display increases this figure by almost two times — up to 2640 points. This demonstrates a high enough throughput of the Thunderbolt interface 3.
Testing external graphics made possible by the fact that NVIDIA and Apple were able to agree and for the first time to release drivers for macOS with support for the latest generation GPU Pascal series GTX 10.
During testing it was found that in the 13-inch MacBook Pro with panel Touch Bar controllers are connected via Thunderbolt 3 chip PCH-H. Thus, throughput may be limited by other components connected through the PCH-H, including the flash drive on the computer. 15-inch MacBook Pro with Touch Bar 3 Thunderbolt controllers directly connected to the processor, thus avoiding performance degradation.