No Power connection required,built-in power IC
Backwards compatible with USB 2.0 and 1.1 devices; Operating System Compatibility: Windows XP/Vista/7/8/10/MAC Pro 10.8.2 Above and Linux
Compatible with PCIE X1, X4,X8, X16 slot
Come with Low profile Bracket ,compatible with Slim PC
If the card doesn't work properly from the start, you may try out the following steps Step 1: de- and reattach the devices to be recognized, so the system can try another recognition search. Step 2: Augment with the optional power supply, so an automatic search can be retried. Step 3: Check the PCI-E socket on the main board for possible faults. Step 4: Try out another Mac Pro, if available, to determine the card's general functionality