It is still low profile since it is single-fan design and less than 20cm in depth (it's 18cm). Anything beyond 20cm is considered mainstream cards because they

It is still low profile since it is single-fan design and less than 20cm in depth (it's 18cm). Anything beyond 20cm is considered mainstream cards because they can have dual fans which offered better thermal design. The cost margin to have lesser width is a discrepancy of 20% but I drank the kool-aid nonetheless.