I am a beginner in the crypto world. Having a background in tech, I want to get my hand dirty in the cryptocurrency thing and decided to build my own mining rig with 3 of my friends. Since people have been mining for 4-5 years ago, there are abundant articles and guides on how to build your own rig. After going through a few credible sources and forums, there was only one more thing that is missing from the whole process. One GPU is missing. The hash rate is not as advertised. Overloading the outlet :D. The last thing we missed was how to connect the 8th GPU to the board. We googled a lot of sites, tried a lot of different BIOS settings, and replaced a few parts, but still couldn't get 8th GPU to be recognized by the motherboard until I found the above video. We have the same parts and settings as the person in the video. One thing that was very critical the included screws to level the M2 adapters. You will see it mentions in the video. Without these screws, you won't be about to support 8 GPUs because the M2 adapters are not connected properly.
Below is the summary of the parts
XFX GTS RX 580 8GB x 8 (There is a tiny switch near the 8 pin power adapter to switch to mining bios. You are welcome)
Intel Celeron 3900
6 PCI Riser
2 M2 to PCI adapters
2 EVGA 1000W PSU