8pin to 12vhpwr

After a lot of troubleshooting, I found that it is most likely the GPU adapter cable, I see in reddit several posts complaining on how bad it is and that it is more likely to be faulty than not, so my PC runs fine with the 3080 but loses video with the 4090 I found this one, Sirlyr 12VHPWR...

I bought a 'ROG Thor 850W Platinum Power Supply (2019)' before the 30 Series cards were announced and obviously it doesn't come with a native 12VHPWR socket, and I can't find ASUS selling one separately to power my soon to be purchased 'RTX 4080 Super'. I'm aware of the dangers of using...