Gigabyte EX58-UD5 Fan speed 100%

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First post, long time lurker and researcher.

Had the 4.0Ghz overclocked bundle for a couple of days and have noticed that the fan speed when attached to the Gigabyte EX58-UD5 headers is always running at 100% and is unchangeable in BIOS or using the Easytune software.

Surprisingly there's very little information about this issue around the forum or indeed the whole internet. The only solution mentioned is a non released BIOS.

I like the idea of dynamically adjusting fan speeds depending on what heat the cpu is producing rather than just undervolting and hoping for the best.

I'm hesitant to update to a non-official BIOS due to the loss of the overclock settings.

Is there any way to fix this without a BIOS update?

If not and want to update BIOS will the oc.uk saved settings work in a different BIOS or do I have to go back through and manually set the same settings again?

Many thanks.
 
What do you mean unchangable in the bios? I can change it in mine or do you mean when you change the setting it has no effect?
 
Poor choice of words perhaps. The setting can be changed and remains changed to Volts or PWM in BIOS after a reboot but it actually has no effect on anything and the fans remain at 100%.
 
As above, make sure you've connected the fan to the CPU fan header, not one of the SYS fan headers.

I'm curious, though (as I'm likely to get this board soon), aren't all the headers of the PWM variety? If so, wouldn't you expect some speed variation, regardless of which header it's connected to?
 
I'm positive it's on the right header as it says CPU fan or something next to it, plus it displays the speed of the fan in the BIOS and Easytune and marks it as CPU fan.

I'm also connecting to the Northbridge connector which is 12v and the SysFan1 connector which is also 12v according to the manual.

According to BIOS the fans can be either Voltage controlled or PWM, hence the 4 Pin motherboard connector for CPU and SYSFAN 2 with offset locking tab for fitment of the 3 pin connector. All other fan headers are the 3 pin variety.

Maybe I'm expecting too much of Gigabyte to allow controlling and reporting of speeds of fans on the motherboard but my old 5 year old Abit board did it very well for less than half the price.
 
I've got the same board, have you got SpeedFan on your rig? When I put it on my rig, it kept the fan at 100% whatever I did, when I removed it again, it went back to "normal" PWM fan speed....

Just a thought.....
 
Well it seems removing Speedfan seemed to do the trick. I can now change the speed of the CPU fan, or at least the number appears to change in Easytune. I'm not noticing much difference in system noise but that could be because the pull Noctua fan on the heatsink is still motoring on at 100% along with the Xilence outake fan.

Thanks for that advice.

Would it be prudent to have both Heatsink fans running off one header, I have a splitter here which could perform that for me. Is that a good idea, given that the current draw would double?

In your situation is it only the CPU fan that you can see the speed of or can you see them all? Perhaps it's a BIOS option I have overlooked, this BIOS has to be the most complicated I have ever seen.
 
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Hi mate, I have 2 UD5's, and on one of them the PWM fan/Voltage functions work perfectly, but on my 2nd one, the only BIOS that it worked on was the F8f beta BIOS.

I don't know why it works on one and not the other with previous BIOS'es though...
 
DavyBoy said:
Hi mate, I have 2 UD5's, and on one of them the PWM fan/Voltage functions work perfectly, but on my 2nd one, the only BIOS that it worked on was the F8f beta BIOS.

I don't know why it works on one and not the other with previous BIOS'es though...
Click to expand...

Lol mines the same dont work, even though im not that fussed still on F7 bios might try 9A if some one confirms it ok. I must say this UD5 is starting to make me think its not one the best boards after all :(
 
If they are slow fans you could get away with 2 on one header but if they are performance fans then i would'nt risk it. I'd buy one Akasa PWM splitters that OCUK sells that lets you run upto 3 fans from a molex connector but retain the PWM function.
 
They're Noctua NF-P12 fans.

That splitter is a fantastic idea, think I will grab one of those. I suppose it only 'senses' one of the fans speeds but I guess if they are the same they should be the more or less the same speed.

Still would be nice if all fan speeds were sensed irrespective of PWM or voltage function.

This is one of those niggly things, not quite important enough to do anything drastic about. Certainly not important enought to RMA or flash BIOS indiscriminately.
 
Rewired the fans and now they show non-zero figures.

Still only able to control the single cpu fan though, is this normal?
 
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BigBruiserAl said:
Lol mines the same dont work, even though im not that fussed still on F7 bios might try 9A if some one confirms it ok. I must say this UD5 is starting to make me think its not one the best boards after all :(
Click to expand...

AFAIK F9a is good to go, it is the same as the F8 final that got taken down from Gigabyte's site because lots of people were having issues with USB keyboards not working during POST, F9a sorted this issue..
 
Well I have had the 100% fan problem and cured it with the F9 bios.
All good so far.
 
Yeah, like I said mate, F8 and upwards sort the PWM issue on the boards that have this problem.

PWM has worked perfectly on my first UD5 since F5 BIOS, but it only works on my newest one from F8 onwards...
 
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