How do I make USB faster

[leke]

Hi all,
I have a VI that does a Read/Write to and from a USB DIO device.I ran it on the following computers:
  Computer 1                                                     computer 2
Dell Optiplex GX280                                  Dell Dimension L400C
Intel Pentium 4, 3.0 GHz                           Intel Celeron,398MHz
Window XP Pro,has USB2                       Windows XP pro,has USB 1.
 
 
It took computer1 400uS per write and 18mS per read,while it took computer 2 4ms for Write and another 4ms for Read.So,if we combine the read and write ,it took computer1  more than double the time it took computer2.Just looking at the specs,I expected computer1 to be alot faster than computer2.Can anyone help? I need to have a better time than I have.
 

[John E]

Hi leke,


Which USB DIO device are you
using?  One possibility is that it does not support USB 2 and thus the
newer machine has to use a backward compatibility mode to communicate with the
device.  Sometimes manufactures will skimp on the performance of these compatibility
modes.  If this is the case, using a USB 1 PCI adapter card (or USB 1.1
PCI adapter card as the case may be).



Regards,