Thunderbolt 3 pcie lanes?

Question

Level 1

5 points

Thunderbolt 3 pcie lanes?

Hi there, how many pcie lanes are in the 2017 MacBook Pro 15-inch thunderbolt 3 ports? I am reading mixed things online, about the 13-inch only having two and not four lanes, whereas the 15-inch in 2017 had 4 lanes in all 4 ports. In 2018, this was all revamped and the 13-inch was given 16 lanes so it had full thunderbolt power capability. Did the 2017 15-inch model have all lanes in it or no? Asking because I want to consider an eGPU and don't know if my ports are restricting compared to other laptops.

MacBook Pro 15″, macOS 10.15

Posted on Jun 11, 2020 11:16 AM

Reply

Answer 1

Kappy

Level 10

362,017 points

Jun 11, 2020 11:51 AM in response to Lucas_lap

These are all a function of the hardware design about which Apple provides little public information. The more lanes supported by the PCIe determines the maximum speed the TB3 ports can sustain. However, I believe what you are reading has to do with the PCIe lane support for the internal SSD. This will affect the r/w speeds of the SSD. The TB3 ports should be on a separate controller, I believe. Check the specs to determine what speeds the ports support. The highest speed would be 40Gbps, followed by 20Gbps, 10Gbps, and 5Gbps. The latter is standard USB 3.0 speed.

Reply

Thunderbolt 3 pcie lanes?

Similar questions