Which is the best fan configuration for my build

Hey, people in the community I was wondering what would be the most optimal fan configuration for my corsair spec-05 if my specs are:
-Ryzen 5 3500x
-Gigabyte Radeon RX 590
-240 GB SATA SSD
-1 TB HDD
-16 GB 3200 MHz ram
-Gigabyte ds3h b450m
-500-watt PSU that comes with a case
PS-Also a side note please recommend me some parts so that I can save money like using an a320 motherboard instead of b450
Thank You!!!