AMD Thunderbird 1.4 GHz Temps

Question

Okay here's my system. AK73 Pro(A) Motherboard AMD Thunderbird 1.4GHz @ 1.33GHz (It's a long story) Thermaltake Volcano 5 HSF Currently as I type this, Motherboard Monitor 5 gives a CPU temp of 49?? C. If I run Prime95's torture test for just a couple minutes that temp will increase to 57?? C. Is this within normal ranges? BTW, I have the case open too.