Re: Risers: what is this trend to remove them and attach the GPU to the mobo?
but my bad experience with risers is that I use 4pin molex psu cable powering up 3 Risers wit GPU Rx480 8GB, and ended up burning the cable connected to PSU. 
Basically you have used a 3x splitter over a single molex cable?
I also read that sata to power the riser is generally a bad idea, this is correct?