Dust dangerous for graphics card?

I recently bought a PC, before that I only had laptops. Now I have noticed that the housing is open on one side like a perforated sheet, and it is quite dusty in our apartment, and after two months some dust has already settled on the circuit board of the graphics card. The fans are still clean, however, is dust on a circuit board harmful?

If so, I have to unscrew it every few weeks to remove the dust from the graphics card.

Dust is not harmful, it can only ensure higher temperatures if it clogs the cooling fins.