Powered risers control the amount of power drawn through the PCI-E slot and stabalize the flow of current using capacitors. The good ones also use a voltage regulator to prevent spikes. Ribbon cable wires are also too thin to be used under constant load, IMO.
I doubt...those complex sytem work fine? half of them did not even recognize lol. anyways, what is control the amount of power drawn?
for example,we have Rx470 TDP 150W. in general, supplied 75W from mobo, other 75W from additional-PSU.
then, 8pin add-PSU can supply 150W,so we do not use riser card, GPU take 150w from here simply.well done! something wrong with this calculation?
On the contrary,connect riser card to 4pin or SATA cables as a mobo . I guess current flows 30W-75W, but HDD,optical drive, etc require about 10w.so overcurrent..
I feel that more dangerous than do ribbon.