The ASRock riser kit came out when ribbon risers were popular. I'm not sure the ASRock kit is better than using USB risers. The USB 6-pin risers have four capacitors for a stable current flow and a voltage regulator to prevent spikes, which the ASRock risers don't have. It's also questionable if providing power from the PCI-E slots for 13 cards through the motherboard is a good idea. The ASRock riser kit is expensive at $30 each too.
oh i see, i thought they were new for the 13 pci slot boards.. this old overpriced hardware is not very good indeed.
them usb raisers are very good.. not much problems with them if you take care of them