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PeteC · 01-19-2005, 05:42 PM

Thanks for the very detailed and very helpful advice Clintfan, I did a bit of searching yesterday and Asus make (or made) a cable with thermistor for their boards described as a P2T-cable and the spec of this is exactly what you have described, 10k at 25 C with a beta of 3435. I couldn't find a dealer in the UK listing one of these so I have mailed Asus to see if they can help, either point out a dealer or perhaps sell one direct.

It's interesting that the winbond chip can be programmed for either thermister or diode sensing, some Asus boards use thermistors and you would think that logically the mobo manufacturer would stick with one method for compatibility with other products, but i suppose that would be too much to hope for.

In the absence of a response from Asus I think theres a fairly simple way to check how the chip is programmed, a b3435 thermister should have a resistance of 4.16kohms at 50 c so if I put that resistance across the 2 pin connector the bios should report PSU at 50 c, and likewise at 10k should report 25 c. The problem then would be to source the correct thermistor.

thanks again for the advice

-PeteC

01-19-2005, 05:42 PM	#3 (permalink)
PeteC Registered User Join Date: Dec 2004 Location: UK, Leicestershire Posts: 10 OS: XP	Thanks for the very detailed and very helpful advice Clintfan, I did a bit of searching yesterday and Asus make (or made) a cable with thermistor for their boards described as a P2T-cable and the spec of this is exactly what you have described, 10k at 25 C with a beta of 3435. I couldn't find a dealer in the UK listing one of these so I have mailed Asus to see if they can help, either point out a dealer or perhaps sell one direct. It's interesting that the winbond chip can be programmed for either thermister or diode sensing, some Asus boards use thermistors and you would think that logically the mobo manufacturer would stick with one method for compatibility with other products, but i suppose that would be too much to hope for. In the absence of a response from Asus I think theres a fairly simple way to check how the chip is programmed, a b3435 thermister should have a resistance of 4.16kohms at 50 c so if I put that resistance across the 2 pin connector the bios should report PSU at 50 c, and likewise at 10k should report 25 c. The problem then would be to source the correct thermistor. thanks again for the advice -PeteC Last edited by PeteC; 01-19-2005 at 05:48 PM.