I am running Windows 7 
And playing/recording synths, like Roland Alpha Juno, Oberheim, etc. via Midi 
 
I have a MOTU micro Express which is USB1 I believe 
Also I got a RME Multiface with a Midi Port. Connected to PCI 
 
I measured IN and OUT midi latency and have 5ms in and 5ms out on the MOTU 
On the RME it's zero ms, from zero to 1ms adding IN+OUT 
 
I know this might not be related to Midiboxes (maybe also?) but here are the people with expertise. 
 
So, can anyone state what it is about? 
Am I beeing fussy? 5ms-10ms ain't that much, but it add's up with another 10ms audio latency. 
 
Would there be a good option to USB Midi Interfaces, like old-school serial? 
Or is only my MOTU effected from that problem? Is it the OS even? 
 
some insight on this topic would be greatly appreciated. 
 
moloxbat