Re: Bug#110273: ITP: lvcool -- "cools" the AMD K7 (Athlon/Duron) CPU
On Tue, Aug 28, 2001 at 01:36:03AM +0200, Eduard Bloch wrote:
> the CPU with no extra stuff, just APM and HLT-when-idle has about 55°C.
> With ACPI, it has about 50-52°C. With the vcool-kernel-hack about
> 45-48°C, and with the LVcool <40°C. All this on typical work - mail
I did some measurements of the power consumption of my computer.
Unfortunately, I can't see the effects of lvcool there.
Results:
2.4.9ac3 idle without lvcool 82 watts
2.4.9ac3 idle with lvcool 82 watts
2.4.9ac3 compiling a kernel 90 watts
2.4.8ac7 with lvcool kernel patch 82 watts
Maybe this is just a problem of the cheap power consumption monitor I used,
which may not be able to properly measure the power consumption of a switching
power supply, but as the kernel compile clearly shows up with a 8 watts
increase, I assume the measurement is ok and lvcool doesn't help too much
saving energy.
On the other hand, I wonder where the power goes if the cpu really stays
cooler with lvcool, as your tests show. Perhaps the voltage regulators
take more power if the cpu's power consumption is changing quickly?
Jan
Reply to: