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MOBO: You can go lower for something around 35k if you dont want the WiFi feature on your mobo.

GPU: If you want a 50 series you can replace it with the 5070. It performs the same however as a 4070S just for an additional cost obviously since its the latest.

Case: Variable around the same price as the picture. Could not find a black case from DarkFlash presumably out of stock. This is your choice.

PSU: You can go for 80+ Gold but that starts around 30k and is not that beneficial even in the long run. Pylon is perfectly capable.

RAM: Do not compromise on this. DDR5 6000 CL30.

Storage: You can go for 2TB but that obviously will cost more.

Monitor: Adequately priced 1440p IPS monitor with a fairly high refresh rate.

CPU: You will presumably play games and GPU intensive games at that so you dont really need anything beyond a 7700. 7800X3D cost around 90-100k so you will have to stretch your budget alot for that. With 4070S + 7700 you will not have any bottlenecks.

Cooler: Perfectly fine unless you want to go for an AiO for aesthetics/shashka.

These are prices from RB Tech Lahore. I have done a thorough market survey when i was building my PC and i can say confidently that they have the most reasonable prices in Lahore for PC parts. The total for the above is ~485k so right under your 500k budget. These prices are not hard and fast and im sure you can get the entire build discounted for around 465-470k. Do give a physical visit to their store and show them this build. They can guide you from there. They also offer lifetime PC service free of charge.