My head hurts! The older Epsons are 1440dpi. They like to be fed an image at 240ppi, so they have 6X6 dots to approximate a pixel. The newer Epson's are 2880. They still like 240ppi, but now have 12X12 dots to play with, so have somewhat (slightly) better dynamic range. [These 6X6 or 12X12 patterns are not fixed, but are "dithered" over a larger area by the printer drivers. But on the average, like to see an integer relation between dpi and ppi.] Most of the dye sublimation printers are 300dpi, but do not use dots of color to approximate a pixel. For best results, really need to know how final result will be printed. But in practice I've found that reasamplin in PS actually works pretty well.