It’s a more solid 3x or 3x+3y, which… if you had a power failure at a chip doesn’t take a 6x to make it 5x. It makes it 4x with the two remaining PHY units because two logical cores went down with one error.

The x being physical units, and the y being CPUs in lockstep so that the software is confirmed to not bug out somewhere.

It’s 6x for the calculated code portion only, but 3x for CPU and 1-3x for power or solder or circuit board.

I know it’s pretty pedantic, but I would call it the lowest form for any quality, which is likely 2-3x.