I manage my rigs with Awesome Miner, so I don't set that stuff manually from the command line. But here's what the rig with the arguments below looks like:

And here's the command line parameters that AM is sending:
Command line parameters: --cclock @1450,@1200,@1200,@1400,@1200,@1450,@1200 --no-watchdog -a ethash -o stratum+tcp://us1.ethermine.org:4444 -u 0x304AcBc3bfa713AC08bD2F6d5a59AaE2df047F72.miner006 --api 0.0.0.0:4028