Absolutely drop the command rate to 2T as everyone else said.
As for overclocking My friend has the same board with a fx57...not the fx55 like i thought but that motherboard is a great overclocking board....DFI was the boards to get back in the day.
I know that chip runs at 2.2ghz you should be able to get 2.6 easy sometimes 2.8 with that motherboard .....do not be afraid they don't run that hot overclocked and there are plenty of guides and youtube videos showing you how to do it. Just follow instructions
Since you are trying to get the most out of that old system. Here is one example of overclocking to 2.7ghz
http://www.overclock.net/t/310696/overc ... d-pix-4-27And no you do not have to lap your heatsink
2600k@4848mhz @1.4v CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LG 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system