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  Topic Review (Newest First)
01-14-2007 09:10 PM
Mootsfox
Quote:
Originally Posted by jrs View Post
Haha....I assume because you have your vcore set below 1.4v?
Yup! 220mhz increase, .1v decrease.
01-14-2007 09:10 PM
pauldovi
Quote:
Originally Posted by Fishie36 View Post
What if you have air cooling?
Clearly it doesn't do a good job of showing performance with air blocks. But it should show you how much heat the CPU is making.
01-14-2007 09:09 PM
Fishie36
Quote:
Originally Posted by pauldovi View Post
This should give you an idea of CPU heat production:

From this thread. The results come from a test I was doing on flow rate vs. heat transfer. The Vcore was at 1.55V, which was intentional to produce more heat. Actual CPU Vcores will be lower, and thus heat production as well.
What if you have air cooling?
01-14-2007 09:08 PM
jrs
Quote:
Originally Posted by Mootsfox View Post
Mine is about 4 watts less overclocked than stock!
Haha....I assume because you have your vcore set below 1.4v?
01-14-2007 09:07 PM
pauldovi This should give you an idea of CPU heat production:



From this thread. The results come from a test I was doing on flow rate vs. heat transfer. The Vcore was at 1.55V, which was intentional to produce more heat. Actual CPU Vcores will be lower, and thus heat production as well.
01-14-2007 09:05 PM
Mootsfox Mine is about 4 watts less overclocked than stock!
01-14-2007 09:01 PM
jrs
Quote:
Originally Posted by Fishie36 View Post
Hmm... so supposedly my CPU is drawing/pumping out 157 watts of heat. I'm surprised my little Arctic freezer 64 can keep it at 48C.
Unfortunately that number is much higher than what it is really going to put out. AMD's TDP of 89w represents a value that is way over the top, and is a power consumption level that will never be reached at stock. I'll pm burn and see what he used when he calculated his, because his number came out to be around 100w......which means he used something lower and more realistic.

~jrs
01-14-2007 11:16 AM
Fishie36 Hmm... so supposedly my CPU is drawing/pumping out 157 watts of heat. I'm surprised my little Arctic freezer 64 can keep it at 48C.
01-13-2007 10:46 PM
jrs
Quote:
Originally Posted by pauldovi View Post
Nice program however it is not very accurate. The problem is, the voltage you set in BIOS never reaches your CPU. This is caused by Vdroop. Also, your formula will not produce an accurate value because:

A. The TPD is not the amount of heat that a C2D puts out, however, it is the amount of heat the cooler is expected to dispell. The C2D may really put out 40 watts or even less.
B. The processors Mhz has no correlation to heat output, as far as I am aware.

Now if you could measure the Amps and voltage going to the CPU, you could calculate CPU wattage.
The program may not be extremely accurate, but it isn't bad for approximations.

A. TDP represents the maximum amount of heat the cooling solution is expected to dissipate(as you said). The figure is high by default from the manufacture because the processor will never reach that heat level? So I guess the program doesn't calculate the total amount of heat, but maybe just how much the heatsink will have to dissipate in order to keep the chip in an acceptable temp range.

B. Raising the clock speed of a chip will increase its thermal output even if there is no increase in the voltage. I have seen an explanation for it but at the moment I can't find one .

Thanks for the input

~jrs
01-13-2007 10:20 PM
pauldovi Nice program however it is not very accurate. The problem is, the voltage you set in BIOS never reaches your CPU. This is caused by Vdroop. Also, your formula will not produce an accurate value because:

A. The TPD is not the amount of heat that a C2D puts out, however, it is the amount of heat the cooler is expected to dispell. The C2D may really put out 40 watts or even less.
B. The processors Mhz has no correlation to heat output, as far as I am aware.

Now if you could measure the Amps and voltage going to the CPU, you could calculate CPU wattage.
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