--- SOLVED ----
USING USB3 port solves problem with all my adapters.......
Baud = 2400 4.16666667 ms/char 4166.66667 us/char bx/10k = 0.24
Expected time for 220000 chars is = 916666.667 milliseconds 916.666667 seconds
Actual time for 220000 chars was = 933368 milliseconds 933.368seconds
Baud = 4800 2.08333333 ms/char 2083.33333 us/char bx/10k = 0.48
Expected time for 220000 chars is = 458333.333 milliseconds 458.333333 seconds
Actual time for 220000 chars was = 461993 milliseconds 461.993seconds
Baud = 9600 1.04166667 ms/char 1041.66667 us/char bx/10k = 0.96
Expected time for 220000 chars is = 229166.667 milliseconds 229.166667 seconds
Actual time for 220000 chars was = 233342 milliseconds 233.342seconds
Baud = 19200 0.520833333 ms/char 520.833333 us/char bx/10k = 1.92
Expected time for 220000 chars is = 114583.333 milliseconds 114.583333 seconds
Actual time for 220000 chars was = 115498 milliseconds 115.498seconds
Baud = 38400 0.260416667 ms/char 260.416667 us/char bx/10k = 3.84
Expected time for 220000 chars is = 57291.6667 milliseconds 57.2916667 seconds
Actual time for 220000 chars was = 58336 milliseconds 58.336seconds
Baud = 57600 0.173611111 ms/char 173.611111 us/char bx/10k = 5.76
Expected time for 220000 chars is = 38194.4444 milliseconds 38.1944444 seconds
Actual time for 220000 chars was = 39281 milliseconds 39.281seconds
Baud = 115200 0.0868055556 ms/char 86.8055556 us/char bx/10k = 11.52
Expected time for 220000 chars is = 19097.2222 milliseconds 19.0972222 seconds
Actual time for 220000 chars was = 19348 milliseconds 19.348seconds
