After reboot (restart) of my W7 64bit, the transmit speed on the network goes way down (from close to 100Mb/s down to 200Kb/s). my way to correct this is to:
1 - uninstall the driver.
2 - reboot
3 - re-install driver.
Then the speed goes back high. if any of the above steps is missing, speed...
64bit
asus
connection
cpu
driver
gbe
hardware
issue
network
pcie
performance
realtek
reboot
reinstall
speed
support
system
troubleshoot
ultimate
windows 7