cooling fans at startup

Emachines / T3120
June 30, 2010 at 18:24:52
Specs: XP HOME
it used to be, when i press the power button on my T3120, the fans would go to high speed and then settle down to idle. after replacing the mobo with oem parts, i noticed they would rev up to about half speed and then idle down. i'm trying to figure out what changed. since the mobe replacement, i have run the restore disk, so i assume all the drivers are the same. i tried speedfan, and didnt work on either of my emachines. i read an article on the microsoft website by i believe a programmer, and he said that most oems lock the bios settings. he mentioned a backdoor approach by editing the values in the driver file, but that probably would not work either if its a read only file. do i need a driver update or bios update? where can i find the fan drivers on my comp?

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June 30, 2010 at 18:55:26
Probably just a different BIOS verson on that board. Fan speeds are commonly addressed in BIOS updates.

Audares Juvo

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June 30, 2010 at 19:37:37
Why was it necessary to replace the motherboard? And why didn't you upgrade to a better S754 board rather than getting another eMachines? Hopefully you didn't pay much because there are several decent S754 boards w/PCIe for under $40 that would have worked:

Anyhow, about a month ago I was given an old W3107 eMachines was completely gutted except for the motherboard. I took it home, removed the board, benchtested it & it still worked. The board is a K8MC51G, same as yours. I did a little googling & found a modded BIOS & took a chance. I now have a working board with all the necssary BIOS options for tweaking/overclocking. Here's the thread if you wanna have a look.

Drivers can be found here:

Getting back to your question...there are no "fan drivers". If there is some sort of fan control, it's in the BIOS. If it's not, it cannot be added or modified without special BIOS Mod software, plus you would have to know what you're doing.

If your system isn't overheating, what are you worried about?

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June 30, 2010 at 21:10:22
To Skip: yes you are right, i just discovered the old board has a pmc bios chip and the new board has sst. i also just found out i could pry the thing out. i thought they were soldered in. Do you think i should put this one in the new board?

To Jam: the old board died, i dont know if it was something on the board itself or the cpu. anyway i bought a new oem board, cpu with heatsink and fan, and extra memory stick for $75 on ebay. My technical expertise has grown immensely in the last 3 months since i changed the board. At the time, i didnt know any better. but i still think i did ok. I'll take a look at the bios modding and study up on it. thanks guys. on another matter, if you want to know anything about building a high performance pontiac engine and dropping into a '79 trans am i can help you with that. i did that back in the 90's and started by taking the engine out and tearing it down. you just have to roll up your sleeves and do it. this is basically the same thing, except with computers and without getting all dirty. there is nothing like going from 0 to 108 mph in 13.09 seconds down the quarter mile in a street legal car....cheers

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October 12, 2010 at 19:38:19
RE: cooling fans at startup. had to followup on this. i was about to throw away my old motherboard for this machine. after looking closely, i decided to put the original heatsink and cooling fan on the new board, The heatsink looked sturdier. Viola. when i turned it on, the fans came up to high speed as they did originally. i cant figure out for the life of me, why this is. the 2 cpu fans are the same size. i have no idea why it does this but im glad it did.

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