noticed this feature on 3080 video cards, if I connect the riser with a good cable pci-e coming from the power supply unit, then the speed of the lhr is about 83-86 megahashes, if I connect the riser with a cheap Chinese 6-pin pci-e cable, and the second end is in the power supply unit, then the speed of work cards with lxr about 88-90 megahashes and so not on one rig, but on two where I have such cards and everything would be fine, but on these nasty cables after a week or two, black wires burn out near the side of the mount with the power supply cable and the card is just falls off, changed it repeatedly and all over again...