My setup for many months:


Mining Status
Miner Status   Running CGMiner (pid=21448)
Last Checked   Sat Sep 13 04:12:33 UTC 2014
Avg. Hash Rate   3575 Gh/s
WU   49886
Difficulty Accepted   273455155
HW Status
ASIC slot   Temperature   DC/DC avg temp   Clock   Type
1   ---   ---   ---   OFF
2   58.5 ℃   79.6 ℃   500 MHz   NE
3   56.5 ℃   79.3 ℃   500 MHz   NE
4   59 ℃           80.3 ℃   500 MHz     NE
5   57.5 ℃   78.4 ℃   500 MHz   NE
6   55.5 ℃   75.8 ℃   500 MHz   NE

Ambient temp has been 35C to 40C....