Doing my runs right now. I currently have a 116777 as my best run with SLI 580s. I wish I had a better 2600k (currently running everything on air just below 5.3ghz).
I still have some room to go as I tweak LOD settings, I just did a straight-5.0LOD run to see how it went (in order: CH,DH,LH,N,LL,DL,CL)