I have a dell inspiron i660s that i was gifted about three years ago, and since then i have been getting into csgo and other games. At first i wanted to buy a 6670, but they went out of stock. So now, im debating getting a GT 730, a R7 240, or a R7 250. My first problem is making sure it fits. The second problem is making sure that any of these will work with a 220 watt psu. The only other option is not buying anything, because my dad and mom WILL NOT LET ME UPGRADE ANYTHING ELSE out of fear for breaking something in the computer. If you could respond with a confirmation that these work, or if any other gpus with similar performance will work.