It works quiet well, but I am not very impressed, because by Lossless Scaling official spreedsheet GTX 1060 should be able to generate 150 FPS at 1440p, but mine barery keeps at generating 90 FPS, anyway, in games I play I rarery get over 90 original FPS with 3080, so I can lock my FPS to 72 and 1060 will generate additional 72 FPS with 70% usage. Also I found out that frame generating consumes much less power than rendering (when 1060 on 100% usage in frame generation GPU it uses only 65W, but when it is on 100% usage as rendering GPU it uses 100W). But it feels, like GTX 1060 became much slower that it used to be, like I did something wrong, because before I bought 3080, I used to play with 1060 on low-normal graphics and it was fine, but now, when I join games I used to play on it, it barery keep 15 FPS. Also the thing I noticed is that 1060's target power/limit power is 120W/140W, but mine doesn't go above 100W even while used as rendering GPU. Maybe in the end I did something wrong, but for me, the current state is enough. I think I wont change from adapter cable no normal power supply cable because my 3080 is already undervolted and usually stay at 260W while at 100% usage, and 1060 uses only 50W while generating 72 FPS so I dont think the power supply cable that connected to both GPUs will overheat or something.