yuvrajroxxxxx2002 :
The pc shold have r3 1200 and gtx 1050 ti and it should be fitting in my bag
This is not going to happen, a gaming size video card and power supply will not fit in a "bag" unless you mean a very large bag and you will be plugging the thing into wall power. Plus by the time you build a chassis for the thing along with a custom screen setup you are going to be well into the price of a laptop. Best you can do is build a small computer and just carry a monitor with you when you travel with it. Or just get a laptop for about $1,000 for games. A low end gaming laptop you can probably find for about $700 for low settings in not too demanding games. Something with a 960m video card maybe on clearance.