I have now installed a mobile XP2500, a Thermalright SI-97 with Artic Silver 5 and a Vantec Stealth SF9225L 92mm Fan (I know … but is was the best 92mm fan that they had got where the SI-97 came from). This CPU will also boot at 1.275V at default speed (1862MHz). It is worth mentioning that I cannot the get the multiplier to change on the fly in Windows 98; it should be possible in WinXP if I (up?)grade.
Here are some figures:
System running Word unless otherwise stated. Video card underclocked 150/150MHz and Video card fan ~ 2600RPM unless other wise stated.
~0.22A ~ 53W CPU@300 MHz (5x60) 1.1Vcore, CPU fan ~ 1000 RPM CPU 22ºC – System 22ºC
~0.21A ~ 51W CPU@300 MHz (5x60) 1.1Vcore, CPU & VGA fan Off CPU 29ºC – System 29ºC
~0.25A ~ 60W CPU@665MHz (5x133) 1.1Vcore, CPU fan ~ 1000 RPM
~0.25A ~ 60W CPU@665MHz (5x133) 1.1Vcore, CPU fan lowest setting CPU 29ºC – System 30ºC
~0.24A ~ 58W CPU@665MHz (5x133) 1.1Vcore, CPU & VGA fan off CPU 37ºC – System 33ºC
~0.25A ~ 60W CPU@665MHz (5x133) 1.1Vcore, CPU & VGA fan off – Running Game CPU 39ºC – System 34ºC
~0.23A ~ 55W CPU@840MHz (14x60) 1.1Vcore, CPU fan ~ 1000 RPM
Video card at default 250/200 MHz
~0.29A ~ 70W CPU@1862MHz (14x133) 1.275Vcore, CPU fan ~ 1000 RPM Video Fan 3400 RPM
~0.32A ~ 77W Default @1862MHz (14x133) 1.45Vcore, CPU fan ~ 1800 RPM Video Fan 5300 RPM
I suspect that the reduction in current compared to the previous setup at the same speeds is mainly due to the Stealth fan being much more efficient than the Zalman. According to the specs it is not as efficient as the Nexus, but pretty close, it is also quiet enough when undervolted below about 1000RPM. I might get a Nexus fan next time I am putting in an order to somewhere that sells them.
I have also tried some different video cards, here are some figure that I obtained at windows desktop 1024x768, 1862MHz CPU, 1.275Vcore, CPU fan ~ 1000 RPM:
Connect 3D Radeon 9000 with Asaka GPU fan at ~ 2600 RPM 0.28A ~ 67W
Nvidia MX440 0.27A ~ 65W
ASUS Radeon 9600XT/TVD 0.31-0.32A ~ 75W
If the MX440 uses ~8W (http://forums.silentpcreview.com/viewtopic.php?t=7753
) then it appears that the 9000 uses ~10W and the ASUS 9600XT/TVD uses ~ 16W. Of the three the Radeon 9000 appears the best performance during games per Watt in 2D.