Era of Mercury / Intex / iBall / Hitech / Richtech / VIP / Zebronics ....... is gone now . Use better PSU from brands like CM . You can have an entry level mother board for Athlon X4 620 in between INR 3000 to 4000 like ASUS M2N68 AM Plus , Biostar GF 8100 , 8200 . If you want to go for the entry level motherboard use your budget for better PSU and RAM . For PSU I will suggest you CM RPP 460 Watt / 80 Plus Bronze @ INR 3800 or Extreme Power Plus 650 Watt @ INR 4200.