Im buying a pc from parts i find here https://www.kupujemprodajem.com/ my budget is ~400$/350e and i wanna cpu to be ryzen 5 3400g so i wanna do a build where i can upgerd it in future for example ryzen 3600 etc i just need motherboard that can support upgrades idk which one to pick and because of pricing i wanna go with 2x4gb atleast 3000mhz ddr4 ram and some 240 - ~500gb ssd and case like this MS Industral Sirius 2 500w so in future i can upgrade psu, add gpu, ram and cpu after all so is there anyone too tell me a build like i said up here i mean components and is it worth it for 400$ competitive gaming (csgo, pubg, rainbow 6 siege, fortnite and other games) it would be good if i find already built one but building it myself wont be a problem too.