Our budget cautious gaming PC build costs about 800 (being it $ or euro) without monitor. Yes, you can replace the RM750X with a lower priced power supply, the RX 5500 XT with similarly priced and performing graphics card from the NVIDIA camp. If you can extend your budget a bit, you can even get the Ryzen 5 3600 or even 3600X if the price is right. Case selection is also a matter of choice.
