I want t know can i run radeon r7240 on 305 power supply cuz i dont have enough budget to buy a new power supply??????
R7 240 require a 350W PSU with 19Amps or more on +12V PSU. The 305W may run, but it's more like gamble rather than a solution. For your PSU the cards that will surely work are R5 230 & R5 220. Cheers!