Can I get an evga gtx 750 ti in my dell inspiron 620?

Dante Ventura

Honorable
Dec 23, 2013
21
0
10,510
Hello I own a dell inspiron 620. http://mobile.walmart.com/ip/Dell-Black-Inspiron-620-Desktop-PC-with-Intel-Core-i5-2320-Processor-8GB-Memory-1TB-Hard-Drive-and-Windows-7-Home-Premium-Monitor-Not-Included/19788717
It doesn't say but it has a 300w psu. It also has a pcie slot x16 2.0. I was wondering if I could go with an evga gtx 750 ti since It doesn't need a power supply connection. I am also concerned about the 2.0 pcie slot because the card is 3.0. Will that cause any problems? Please let me know if it's worth it :)