PXE boot args for disabling nouveau

Doing lsmod | grep nouveau showed nouveau drivers being loaded, even though I had the following PXE boot args

append initrd=myrd.gz root=/dev/ram0 rdblacklist=nouveau nouveau.modeset=0 init=/bin/init ramdisk_size=800000 ramdisk_blocksize=1024 rw
Noveau was still loading, but adding nouveau.blacklist=1 solved it, like so:

append initrd=myrd.gz root=/dev/ram0 nouveau.blacklist=1 rdblacklist=nouveau nouveau.modeset=0 init=/bin/init ramdisk_size=800000 ramdisk_blocksize=1024 rw

There is also a nouveau.disable=1 option, which I did not try
http://fedora.12.x6.nabble.com/Problems-removing-nouveau-in-fed-18-td4993336.html