System Report says my internal sd card reader in my new 2011 mac mini bought on the 23rd from frys is 2.5 GT/s. What is GT/s?? How many megabytes per second is 2.5 GT/s??
2.5 GT/s on PCI-Express = 250MB/s This is how that's worked out... note 'b' = bits, 'B' = bytes, 8b = 1B. 2.5 GT/s = 2.5 Gb/s = 312.5 MB/s... then you've got 8b/10b overhead so 312.5 * 0.8 = 250 MB/s.