I'd have though 50-55C with a gorb. You clearly have good case cooling, so it'd probably be a bit below 50C, but I wouldn't expect miracles. The gorb isn't designed for socket A cpus, and a lot of people have crushed their cpu cores with the strong clip on it. With good case cooling and a good hsf like the Globalwin FOP38 or Alpha PEP66 you could get temps around 40C - I'd seriously consider getting a new hsf, cos gorbs (generally) can't cope with oc'ed AMD cpus.