Well if the options took you will see:
NVRM: RmPowerManagement: 3
NVRM: RMPowerManagement: 4
messages in /var/log/messages as well as a char option for the RegDwords:
modinfo nvidia | grep Dwords
Do you have these?
You can also check the nvidia-settings-manager and go to Powermizer and make sure it is set to maximum performance, lower clock speeds should be greyed out
If these don't appear to be true, you need to make sure you correctly added the module options for your distro of Gnu/Linux