Same as Penicilyn I'm at 4.7ghz at 1.27v so I'm thinking you can still do some tweaking. I have my temps under 80degs with prime95 running for 2hrs and my chip is cooled by an Antec 920 with push/pull.
Just thought you'd be interested. Nvidia just released the 320 drivers and so far so good. Here is a link for you to try out!
Welcome to OCN . There are plenty of forum members that can help you get the most out of your rig. User rigbuilder http://www.overclock.net/rigbuilder to put your rig together and add it to your signature.
Best overclocking method -...
I have mine at 4.7ghz with 1.26v and my max temp is 80deg with prime 95 running for 1hr. I know that nothing I do will hammer the cpu at 100% consistently so I am not worried. Mine is cooled by an Antec 920.