What about my Custom LOW BUDGET cpu gaming rig?

That build looks good, but you aren't done yet. You still need more parts-their are 9 in all. You have the CPU, MoBo, RAM, GPU, and HDD. The CPU probably comes with a CPU cooler. You still need an operating system, a case, and a power supply. A power supply and a case each will cost you around $50 (about 150 RM each) and Windows costs another $100 USD (300 RM). That puts your build at around 1400 RM. If you need to go cheaper, you can chance a cheaper power supply-stay above 500 watts. Cheaper models may not supply the advertised wattage, and prevent you from booting. A cheaper case just doesn't look as nice, and may be harder to put together. Windows is pretty much mandatory-your games won't run on free operating systems such as Linux. Dual core is good for gaming, as most games don't use more than that. Single core is outdated, and really doesn't work anymore.