I have an AMD 64 2800+ 1.8ghz in a LanParty UT nF3 250 mobo inside a Antec Super LanBoy case with two 120mm fans, front and rear. At idle my cpu temp is between 43-47c and when I start to push it temp rises to about 54c. What temp. should I start to be concered with and possibly think about another cpu cooler? Also, I bought the "Processor in the Box" so it came with a heat sink and fan from AMD and the fan speed is about 3200rmp.