are these parts compatibal with each other and are they hard to find , and am i forgetting something ? :

1-CASE : Cooler Master MasterBox Q300L Micro-ATX PC Case – Compact mATX Computer Case with Magnetic Dust Filters, Modular Adjustable I/O Panel, Perforated Airflow Design, 1 x 120mm Pre-Installed Fan

2-motherboard :GIGABYTE B550M DS3H AC R2 AMD AM4 mATX Motherboard

3-CPU :AMD Ryzen 7 5700 8-Core, 16-Thread Desktop Processor

4-harddisk :M.2 NVMe PCIe Gen3x4 SSD 1TB, Read Speed up to 3500MB/s, SLC Cache TLC 3D NAND Gaming SSD

5-GPU :Nvidia GeForce GTX 1080 8GB FE Founders Edition GDDR5X Video Graphics Card (Renewed)

6-RAM :CORSAIR Vengeance LPX DDR4 RAM 16GB (2x8GB) 3200MHz CL16-20-20-38 1.35V Intel AMD Desktop Computer Memory

7-POWER SUPPLY :Power Supply, Equipped with Ultra-Quiet Fans, 500W Power Supply Suitable for Micro ATX, is The Best Gaming Server Power Supply 500W ATX PSU.