withoutvideo

Help please, I have little money and I could only buy a zotac gaming gtx 1650 oc, without 6pin pcie port, but when installing the driver the pc hangs and stops giving video. my mobo is an Asus M4N68T-M LE V2 (old am3), phenom ii x4 955 3.2 ghz, 8gb ddr3 1333 and psu 350w please.