Disclaimer: Physical dimensions aren't checked yet, such as graphics card length, CPU cooler height and RAM clearance. Check these measurements against the manufacturer's specifications before you buy.
Start with either one. Every list you open after that only shows parts that work with it.
RAM is matched to your motherboard's DDR type and slots, and cases to your motherboard's size.
See at a glance whether anything clashes, plus your estimated wattage for choosing a power supply.
Copy your build's link or Reddit markup for feedback, or add every part to your Amazon cart.
Your build saves automatically, so you can come back and edit it any time.