AMD Athlon 64 X2 4200+ Overheating

I have a HP Pavilion a 1483w. The Athlon 64 X2 4200 is Socket 939.

My computer has been turning off. I went into the BIOS and the CPU temps are crazy! Just looking at the temp in BIOS, it got up to 70C! It will start off at around 45C and slowly work it's way it to 70C. If I load Windows, it goes up to the mid 90C range and cuts off completely.

I'm using the stock HS and Fan. I've got some thermal paste, which i have applied (after completely removing the old thermal strip that was on it). I turned it on for a couple of minutes to let it get warm, then turned it off so the thermal paste could set up good. No luck. Same temps.

Anybody got a solution on this? I've seen several people on forums with this problem, but none of the threads were complete (people posted their question, got a reply and never came back...).

Any help would be greatly appreciated.

Thanks,
Chad

Those are obscenely high temps for that CPU and I'm surprised it makes up to the 90s. I was under the impression that the X2s had a much lower temperature ceiling... like mid 70s. Since you said it slowly builds back up, be sure to check the airflow in your case... are you using the tower in an enclosed desk? I had a computer desk once that was completely enclosed (it had a door that I had to leave open)

Like Nik_I said... obviously you want to make sure the CPU heatsink is properly fitted to the socket.

im runing the adm 6000+ d/c and i had a big problem with the heat ,even though i was useing the recomended heatsink and fan at the time ,in the end to cure my problem i whent out and brought evo blue akasa ,it is big then with a 120 fan rear of case pushing pulling that heat out , as well as the main one on the evo and my temp are stable now under full load , they say the cpu compound can take a long time to set the longer its on the lower the temp will go eventuarly ,some people prep the heatsink first with a light grade of wet and dry give it a key , some might agree some might disagree on that , some other things you could check out is the bios if you have that cool and quite option that will raise and lower the temp the evo is a good option with support for 939 am2 sockets but you have to take out the hole board to fit the mounting brackets under it
good luck