PCI-E 16X to 1X Adapter Riser Card Flex Extension Cable with Molex Power Connector Total length: approx. 19cm Molex 4 pin power connector available for more stable operation for graphic card while mining Install PCI-E 16X device to PCI-E 1X slot freely according to dimension and position of computer case Ideal for small computer & server case, like 1U & 2U One end is PCI-E 16X female and another end is PCI-E 1X male