Crazy temperatures on my pc

Theres a huge difference between the 3 cores of my cpu and its really confusing me. Heres my system:

Phenom tripple core 8450 (2.1GH)
ACS Geforce 7050MM Motherboard
2 Gb Ram (2gb X 1)
Nvidia Geforce 9500GT (No fan, just a giant heatsink)

3 HDDs
1 X 250GB IDE (Main drive)
1 X 160GB SATA (Backup)
1 X 80GB USB (I call this one my ambassador drive lol)

Aside from the usual fans (cpu and psu) Ive installed one other case fan at the side of my computer that blows air directly onto my motherboard.

I got another pretty powerful fan at the back of my comp but I aint too sure how to install it coz my motherboard only has 1 fan socket, plugged it directly into the power socket but it was so damn loud I couldnt sleep.

Now for my problems:

HERES AN EXAMPLE OF HOW SPEEDFAN DISPLAYS MY SYSTEM'S STATS.

http://i43.tinypic.com/2nnbk2.jpg

1)Everytime I play a game like fallout 3, the temp of my "GPU" and "temp" reach peaks of up to 76C, "temp1" around the mid 60Cs and "temp2" somewhere in the 50Cs.

Now I figure that GPU is my video card and temp, temp1 and temp2 are the cores of my cpu, I aint too sure. What I wanna know is why theres such a great difference in the damn temps.

2) As you have seen from the pic above (on the link), speedfan doesnt give a novice user like me much to go on in terms of what is actually what. Is there any way someone can explain what all these things mean? And why one of these two fans are so lazy?

 

Hello,
According to what I can see in you SpeedFan window, the temperatures in the list are the following items:

• GPU = Graphics card
• Temp = GPU (again)
• Temp1 = Motherboard temperature sensor (unknown location)
• Temp2 = Motherboard temperature sensor (another one)
• Temp3 = Non-existent sensor
• HD0 = first hard drive
• HD1 = second hard drive
• Temp1 = Second hard drive (again)
• Core = Processor temperature

From this, and from your reported voltages, I can report that your motherboard probably does not pass the most accurate data to speedfan, and speedfan is probably misinterpreting that data that it is being sent. This is quite normal.

I would recommend trying Everest to see what it says: http://majorgeeks.com/download4181.html

 

Thanx for u help - looks like u were pretty right, these are the readings I got from everest:

Sensor Properties:
Sensor Type HDD
GPU Sensor Type Driver (NV-DRV)

Temperatures:
CPU 30 °C (86 °F)
GPU 56 °C (133 °F)
Hitachi HDT725025VLAT80 39 °C (102 °F)
Seagate ST9160821AS 32 °C (90 °F)

I use to think that I was burning up my System when I wasnt even giving it a challenge. Nice to know I can keep that other annoying loud fan turned off.