Hello guys, I have a Mac Pro 4.1 Intel Xeon E5520 Dual 8x2.26 ghz 6GB DDR3 1033Mhz Ram Nvidia GT 120 512MB Mac OSX 10.9.3 I wanted to buy this card here to replace it with the gt 120 http://www.steg-electronics.ch/de/article/evga-gtx-650-178246.aspx And i have 3 questions: 1.I know i need another power cable for the graphics card is it this one? http://www.amazon.de/Adaptare-PCIe-...7RU6G/ref=cm_cr_pr_product_top#productDetails 2. My GT 120 is 1 slot , the gtx 650 has 2 slots do i need ot buy anything else or can i just do it like with the gt 120? Do i have to get another thing to plug it in the port or can i just use 1? 3. is the Evga GTX 650 compatible with mac osx?