Thunderbolt 3 and PCIE Gen 3 lanes

Chen-wei

Estimable
Dec 23, 2015
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4,510
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I have been wondering about this for a long time. I have a laptop that has a USB C port which is capable of supporting Thunderbolt 3. However, it only has 2 PCIE Gen 3 lanes. So am I able to get 40GBPS of speeds as advertised or am I only able to get 20GBPS as I only have 2 lanes.
 

Chen Wei

Prominent
Jun 20, 2017
1
0
510
0


Its a Dell XPS 15 9560. It definitely supports Thunderbolt 3. Im just unsure of the speeds.
 
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