how did you guys set the memory clock to 300?
i've he 5850 extreme (3of them) and cant find a tool to set the 300mhz for all of them... trixx does the trick for jus one card and afterburner doesn't change the mhz below 900.
any help would be awesome... right niw i get 275mhash, need more:-)
See this thread:
http://forum.bitcoin.org/?topic=4292.0very easy to do

All my 5870s are at 300 and it saves quite a bit on power and also the cards run cooler...