Monitoring computer temperatures

[sterfry1988]

This is my first time ever building a computer. I installed all the components no problem. Q6600 intel processor, ASUS P5N32-SLI 680i MB, 4gb corsair xms RAM, My power supply is 500w, the case i am using can be found here. OS windows XP pro SP2
http://www.bestbuy.com/site/olspage.jsp?skuId=8329864&st=computer+case&lp=5&type=product&cp=1&id=1175388730209

So i have downloaded many different software applications to monitor the temperature of my computer.PC probe II, Speedfan, CoreTemp, CPU-Z, Everest HOME. Out of all of these programs they all give off different computer temperatures. With my computer just with firefox open and the basics(aim, catalyst, etc) no gaming or photo editing software. My computer temperature reads 30C for the CPU, and 40C for the MB. With Coretemp it reads 51c, 43c, 44c, and 38c.
Basically i am just wondering if i need to worry about any of these temperatures and if so what can i do to improve them. I assume that the computer will just shut off if anything becomes harmful. I also installed another fan blowing air Out of the case on the door.

 

[chookman]

Those temps are actually pretty good if you still have stock HSF. To lower temps you could look at additional case cooling for better air flow, an aftermarket cpu cooler (for that CPU Artic Freezer 7 OR Thermalright120 i would go) and some thermalpaste... but i would say leave it how it is all looks well

 

[sterfry1988]

One thing i am kind of wondering, what about the MB temp i though the threshold for a MB was like 45C where would i place a fan to help cool the MB

 

[sterfry1988]

also the light on my comp is orange, and is it supposed to be green lol, im thinking i may have the LED cords in the wrong place