Using the latest udpcast (udpwindows port, I cannot obtain more than 15.2mbit/s when using a net express bonded nic as the receiver. This virtual nic has no problems obtaining 90mbit/s with smb or ftp (the ‘bonding’ is mac based outbound only and works as passthrough for individual clients), so it’s not expressly (pardon the pun) an issue with that. Testing with other machines with normal nics (on the same switch with no changes in topology) I’m getting 45+ The physical nics are d-link dfe530tx rev c cards. There’s no error messages (no resends at all). Any ideas? (other than ditching the nic express of course :p )