So, I got a replacement (used) MoBo from Intel yesterday. I went to the market and bought 2 things,
1. Corsair CX430 (v1, unfortunately)
2. CoolerMaster 80mm case fan
The PSU is fitted above the mobo and has the large fan fitted on the bottom of it. So, it would take hot air from their. So, Instead of fitting the newly bought fan in exhaust position, I fitted it in the intake position. so what happens is, the fan takes cool air into the case, the PSU fan takes that air and the hot MoBo air in. I've kept one side of the case open, as the wires were so long.
So far it idles at 28-30C and 55-60C while playing games.