Building a full computer setup within a budget of 100,000 BDT can be challenging, but it is possible to get a decent setup. Here's a sample build that you can consider:
CPU: AMD Ryzen 5 5600X (Approx. 17,000 BDT)
GPU: NVIDIA GeForce GTX 1660 Super (Approx. 22,000 BDT)
Motherboard: ASRock B450M Pro4 (Approx. 6,000 BDT)
RAM: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4 3000MHz (Approx. 9,000 BDT)
Storage: Kingston A2000 500GB NVMe SSD (Approx. 6,000 BDT)
PSU: Corsair CX 450W 80+ Bronze Certified (Approx. 4,000 BDT)
Case: Phanteks Eclipse P400A (Approx. 8,000 BDT)
Monitor: AOC CQ32G1 31.5' Curved Gaming Monitor (Approx. 23,000 BDT)
Keyboard: Redragon K556 RGB LED Backlit Mechanical Gaming Keyboard (Approx. 3,000 BDT)
Mouse: Redragon M686 Wireless Gaming Mouse (Approx. 2,500 BDT)
Speakers: Logitech S120 2.0 Stereo Speakers (Approx. 1,500 BDT)
This build should be able to handle most modern games and provide good performance for the price. The total cost of this build comes to approximately 100,000 BDT, assuming current market prices. Keep in mind that prices for computer components can fluctuate, so it's always best to check for the latest prices before making a purchase.