It is not bad actually. It also depend what case you are using. I haven't overclock mind yet, and its at 28 c idle and 33 c full so far.
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I'm using an Antec SX-1035B with (4) 80mm case fans. I checked out the AVC Sunflower which has 33 cfm, thought the Thermaltake Dragon ORB with 49.4 cfm would be better ?