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cpu heat factors

post #1 of 7
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Question: What factors contribute the most to your CPU temp? Is it just straight clock speed? How much do FSB speeds and voltage affect temps? It seems to me that the FSB makes a huge difference when running the same clock speed but with different multipliers. Lower multiplier, higher FSB, more heat. Higher multiplier, lower FSB, less heat. Does that sound right? I'm not sure how voltage affects temps but it would seem logical that the higher the vcore, the higher the temps. If someone can shed some light on this for a poor oc noob that would be great.
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post #2 of 7
Voltage is the only thing concerning heat.

Because the processor needs more juice to get a higher clock and stay stable. Think of it as a glass of water. Voltage being the size of the glass, the Mhz being the water... and say your in a car. The more water with a smaller glass, the higher chance youll spill the water. Spilling the water in this case being your 'stability', and too much can cause you to crash.

BUT, if you increase the size of the glass (voltage) then youll have a less chance in spilling that precious water. =)

Hope you kind of understood that.. lol
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post #3 of 7
Thread Starter 
really? In my minimal experiences with oc'ing, I've tried the exact same cpu speed with a high FSB/low multi, and low fsb/high multi, keeping the voltage the same (1.375 I think) and the higher FSB method produced noticably more heat. 4-5C
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post #4 of 7
What a perfect analogy... Unfortunately, heat is generated when you raise the vcore... but I have been able to raise my FSB without any single degree increase in heat. Not sure how. Still using a stock fan with my P4 2.4Ghz.

What I want to know is at what temp does the CPU become negatively affected or in danger of melting?

100F? 110F? 120F?
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post #5 of 7
Heat is increased once Operating frequency is change as the Core is worked harder thus requirs more Volts. Overall its the Voltage that caus's the heat increase.
post #6 of 7
Quote:
Originally Posted by ENTERPRISE1701 View Post
Heat is increased once Operating frequency is change as the Core is worked harder thus requirs more Volts. Overall its the Voltage that caus's the heat increase.
Not always requiring more volts...

I run 305x9 (200 x 9 stock), on stock voltages. My temps aren't much higher than they are at stock speeds..

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post #7 of 7
also changing the multi requires more voltage because it has to activate another mechanism in the processor, leading to further rise in temperature with a processor running at a lower multi but higher fsb.
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