Yes. A 6-pin PCIe connector is designed to deliver a lot more than 150W. Part 2-The testing

Talking about how the +2 is wired into the 6-pin connector and putting it on the load tester to show that the +2 has nothing to do with the cable or connectors' capability to do 75W, 150W... or even 300W.

[@Mickulty]

Completely agree with the general point, but I don't know that the slight simplification that the +2 is just sense pins has helped. My understanding is that one is a sense pin, one is ostensibly an active ground that is intended to sink current. That's supported by the slight change in the voltage even with the connector fully seated.

[@jonnyGURU]

Ostensibly, any additional ground is an improvement in power delivery, but that depends on how those pins are terminated inside the GPU. Where I misspoke was stating they were BOTH sense. Fact of the matter is, pin 6 (the center pin closest to the retention clip on the 6-pin portion) is "sense0". Pin 4 (the pin farthest from the cip on the +2) is sense 1. But I've never seen sense1 not grounded on any PSU. If sense0 is not present, the GPU can only expect up to 50W from the 6-pin. With sense0 grounded, it expects up to 75W is available.
Like I said in the video, the connectors are a bit worn. When I did my test run, I used a different cable on a different port and the voltage didn't budget, but for the video I moved it and it's a little loose. I can shoot a short video showing the other cable and connector to prove the point. With the +2 attached, it physically stabilized the connector and prevent "wiggle" from causing the voltage to drop. For consistency sake, I used the same PSU for the past 5 years for tests like these, but I suppose that's not counterintuitive as it's causing more problems than having a newer reference.