AMD CPU Overheating...

I was worried about my cpu tempreture because it idles at 45- 47... I downloaded a stress test program and at 70% load my cpu was already at 55c. I'm scared because at 60c, silicon becomes unstable right? Can anyone help give me some tips for making it cooler. I think they mounted the IHS badly... I'm about to buy the CM Hyper 212 to replace my stock... Are these temperature normal? I haven't over clocked it or anything except under voltage my cpu like 0.5 volts. Thanks...

Can you clarify this comment you made?

I haven't over clocked it or anything except under voltage my cpu like 0.5 volts. Thanks...

What freq is it running at now?

You may need to reapply for HSF - shutdown, remove, clean off the old grease, reapply, refit and try.

idle temps should be lower than 45 unless you have oc'd it a lot.

If you are running the stock cooler the temps arent that far off. With the stock cooler my 940 idled near 50 and maxed out into the 60's. If you are looking for a good cooler, get a Xigmatek S1283. I went thru 3 after market coolers before trying the Xigmatek which dropped my temps to idling in the low 30's and maxing in the mid 40's.

Some one said the Hyper 212 was about the same preformance but lower price...

I don't think your temps are that bad.
I certainly would go for remounting and reapplying the thermal paste again though.
AMD stock coolers are actually pretty good, my 920 clocked at 3.2 has never gone over about 54, idles at around 34. Be sure to use the correct amount of thermal paste, too much is as bad as too little. I use the rice grain size technique, sit the heatsink down about 1/8 turn off, and with steady pressure down turn the heatsink into position, and lock it down. May or may not be the best way, but I never have had any heat problems.

I feel a lot better, my cpu at full load was at 57-59 for 10 minutes...