Is My First PC Build Solid for 3D Modeling?

You probably don’t need a 750W PSU for this build. By the way, the price for that 3060 is quite steep since it’s an older model. You might want to look into something like the 9060XT if gaming is a focus, but it can be pricier. For modeling, an Nvidia card is typically better. Watch some reviews on cases to see which size fits best with your motherboard. I’d recommend going with a slightly bigger case for future upgrades.

Any case size will work! If you choose an ATX case, it'll support any motherboard size if you later decide to upgrade. Overall, this looks like a solid start for your budget! Just a heads-up, consider upgrading your RAM in the future if you plan to work with larger files—it could bottleneck you otherwise.

Your build looks good, but remember that the CPU already comes with a fan, so you probably don’t need to buy a separate one. Also, using one stick of 16GB RAM can save you money now and let you add another later without issues. Just check that case; it might only have one fan, so think about adding another for better airflow. Smaller cases are great for portability but can limit your parts choice, so mid-tower or micro ATX are great budget-friendly options!