Sign in with
Sign up | Sign in
Your question
Solved

What is the CPU temperature depending on?

Last response: in Overclocking
Share
September 22, 2010 6:57:39 PM

I have actually googled this for a good 30 mins or so, can't seem to get the answer, so maybe you guys know?

I know it has something to do with the Voltage, but is it the voltage alone, or are other factors helping the temperature rise?
a b à CPUs
a b K Overclocking
September 22, 2010 7:10:02 PM

Voltage, ambient temp and airflow even if you are water cooling if you cant remove the heat in the case then the heat build up in the case will increase temps.
m
0
l

Best solution

a b à CPUs
a b K Overclocking
September 22, 2010 7:21:38 PM

Voltage and the Current draw at that Voltage and the ability to dissipate the heat.. You pretty much determine the voltage if you alter it from the BIOS determined value (Based on CPU)

So the varable is current. The current is based on several varaibles. (1) work down by the CPU based on what you + background programs are doing (Can Find % of CPU utilization. The freq used by the CPU ( stock vs OCed). Think of the CPU as a RCL circuit (RCL = Risistance, capacitance, inductive) When Freq goes up R - no effect, Xc (AC Resistance of a capacitor) goes Down, Xl (AC Resistance of an inductor) goes up. The bottom line here is that as Freq goes up the CPU Impeadeance (Fancy name for AC resistance) goes Down = Higher Current. The Temp also has an effect. IF Modern CPUs did not shut down above a given temp a condition called thermal runaway could occur. Semiconductors have a negative temp coeffient (As Temp goes Up R goes down). This means thas as the temp hits a given point the resistance goes down, so Current goes up causing MORE heat, R goes down more, I goes up more untill it goes POOF and gives that burning oder.

Power = Current x Voltag and Voltage = Current / Resistance

Sorry for spell, in a Hurry.
Enjoy Elect 101
Share
Related resources
September 22, 2010 8:17:36 PM

Best answer selected by Slipperss.nnAlso another question, my CPU mhz is going up and down, depending on the load. How do i make it constant?
m
0
l
a b à CPUs
a b K Overclocking
September 22, 2010 8:32:00 PM

disable CIE and EIST in the bios.
m
0
l
a b à CPUs
a b K Overclocking
September 22, 2010 8:33:15 PM

Slipperss said:
Best answer selected by Slipperss.
n
nAlso another question, my CPU mhz is going up and down, depending on the load. How do i make it constant?

n
nYou should let to change speeds, when your cpu isnt loaded it drops to a slower speed ans saves power, produced less heat, when more power is needed it goes back to full speed, you wont see any performance impact.
m
0
l
!