yeah its down to binary 1,2,4,8,16,32,64 yada yada. which is the number of "blocks" or pixels. scales up (and down) nicely.


Though on that front if I remember rightly HDD's are rounded to 1000's over 1024 in an OS but not by the manufacturer so what your PC "sees" is the rounded but the HDD is quoted as the full. Or theres something like that with them!! Got a year older today so starting to loose it!