CoL2k3

Hello,

i have a gigabyte EX38-DS4, with an intel Quad Q9450

i had it working for a couple of months with a stock intel Core 2 duo cooler, and recently purchased a xigmatek HDT-S1283.

Both have the same issue, as soon as i start the pc, it spins for a couple of seconds, then stop (meanwhile case fan and everything else is working) lights inside are on, and then the bios starts, only a few seconds after it does, the cpu cooler starts and stays working, theres an unhealthy delay.

i tried searching around and it seems this is due to the Smart Fan control, but i would like to double check and be sure theres nothing else that could be causing this.

If thats the reason tho, is it healthy to have smart fan on? i mean maybe it is suposed to be working this way, but is it healthy having your cpu work without a cooler for a few seconds everytime you turn it on?
i had set the bios to give me a warning when it reached 80C temp, and it did everytime i turned the pc on, wouldnt this hurt the cpu on the long run? is it worth it having it on?

Doby

I would say its not a good thing to have it act that way, I would disable smart fan it that is causing the problem, maybe a bios update would help, check the gigabyte website and look through the bios updates and see if there is one that addresses the issue

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CoL2k3

thanks,

sadly im on the third bios revision, so i doubt they consider it a problem, i have also seen on other forums people reporting this very same problem, so is not really an isolated case.

would it shorten the fan lifetime or have any cons if i keep it on at 100% all the time?

or should i definitely turn smartfan off

Doby

My main concern would be the cpu if it reaches 80C before the fan turns on, I would disable smart fan the only con would be noise

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CoL2k3

ok bad news :(,

i tried disabling smart fan control, but it didnt solve the delay either, it only made the fan run at 100%, but a couple of seconds after i start the pc.

I read somewhere that a solution could be to plug cpu fan (4 pin) on the system fan header (3 pin), and this would make it start with the case fans/video card fan and everything else that actually starts as soon as i turn on the pc.

Should i try it? would there be any problem hooking the cpu fan on the system fan header? (4 pin vs 3 pin)
would it be better to plug directly to the PSU (new cooler came with an adapter to hook it to one of the psu power cables)?

I would appreciate every advice i could get, since i would rather try other stuff before doing one of those, so im all eyes.

p.d I emailed gigabyte about it and i will post if i get any update from them, but i seriously doubt ill get any solution from them since i read around that people called gigabyte about it and didnt really get a helpfull response

Doby

I am not familar with that heatsink assembly, its not a good idea to connect it directly to the system fan header becase its only 3 pin plus the mother board may think that the cpu fan is not connected and shut down if something is not connected to the cpu fan header.

Follow the instructions of the heatsink on how to directly connect it to the psu

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cp_ent

Whether I hook a fan to the mobo header or the molex connector it / they all start at the same time....no delay. Unless I create the delay with smart fan at the cpu header.
When you have smart fan enabled what are your temp settings for each threshold / speed change?

One day I went into bios and tried to stop the surging fan noise at a particular temp threshold by adjusting it a few degrees in the smart fan settings. I did and caused a delay at the cpu fan until my cpu temps went up to 25 C , then it started , the next speed was always the one that surged between 38-40 C ...so I bumped that to 44 C...no more surge. Played with that for about a week ...and finally got it just right with no delay ...and no surging ...

But as you say, you have dis-abled smart fan and the fan should be running full speed immediately, regardless of the 12 v connection....maybe the fan manufacturer has some details. Soft start feature ??

Have you tried to test just the fan on any other computer / molex connection. Are you using the power adapter that is supposed to come with it ......I downloaded the user manual PDF. Figure 8 shows the molex to header 3 pin adapter.
http://www.xigmatek.com/product/air-hdts1283.php
Scroll down 1/2 page click download.

I am perplexed ...are you positive you have this smart fan disabled...If you do it should stat immediately. And how could your cpu ever get to 80 c...that 's crazy...Even if you had some delay built in a temp of 80 C is out there...like a disaster.
A delay of a few seconds is not going to hurt anything ...as long as the temps never get above 30-40 C...However I , like you wouldn't want it either.

Contact the manufacturer and see what they say ... just a thought. Change the molex connector from one to another or use the 3 pin adapter

CoL2k3

Hello, and thank you so much for taking the time to reply.

I know wether its hooked to the mobo header or psu molex both are suposed to start at the same time, sadly like i reported this isnt the issue and ive read around a lot of people have this same problem with gigabyte boards, a lot probably experience it and just havent noticed (i didnt notice till a month after i built my pc simply because a few seconds into the boot it has already started, so bios and pc always gave good readings and fan speed readings)

"When you have smart fan enabled what are your temp settings for each threshold / speed change?"

im sorry, i dont get this, on my bios theres only enable smart fan control and disable, and if i choose enable, then i can choose PWM or voltage and thats it, cant change anything else.
and absolutely every option has the same fan delay.

like i said too, yes i have tried this fan on other computers and it works perfectly, in fact i have tried 2 different coolers on my pc (intel stock and this xigmatek), both with the same exact delay, its simply a MB error ( i contacted gigabyte about it, still have no response, will update as soon as i get one).

I did however tried today hooking the cpu cooler directly to one of the psu cables, by using the power adapter you mentioned, and guess what, it now works perfectly, it starts as soon as i power on the pc (just like everything else) and stays on through the whole time. problem is, that adapter only uses 2 cables really (power and ground), so i cant even check the fan speed anywhere. do you think it would be harmfull to hook it to the 3 pin system fan header (and not the cpu fan header) instead of directly to the psu?, so at least i could get a fan speed reading somewhere.

I do know that the system fan header would start inmediately with no delay, since its only the cpu fan header (4 pin) with this problem, every 3 pin header or fan hooked through whatever means would work fine.

and guess what, by having it hooked to the psu, i tried the 80 C alarm, and this time it didnt beep, i tried the 70 C, didnt either nor the 60 C, so suposedly it was indeed reaching this temps while having no cooler (fan delay) at startup (it always suposedly went down tho, by the time i got to the bios, the fan was at full speed ( i looked at it spinning through the whole process, bios gave no fan speed readings ) and the bios read 32 C).

gigabyte x38 board owners should check it out, tho, could be dangerous.

so anyway, no dangerous high temp alert anymore, but having it hooked to the psu gives me no fan reading of any sort, should i try hooking to the 3 pin system fan header?

cp_ent

SWell That's good that the fan is working full speed instantly...
I thought the adapter was a 3 pin header cpu connection...I guess the B&W PDF is'nt all it's cracked up to be....I thought you had it made until i read the next sentence ....lol

I have an ASUS board AMD cpu and my smart fan bios , once enabled gives me options to set 3 fan speeds...low /med/high...therfore the threshold temps of ie; lo 25C after 25C it kicks to the next speed(med)...until it reaches my next selection 38C then it kicks to Hi....
That is in the bios . I also have the ASUS program ASUS PROBE and it monitors the temps and fan speed too.

I would not recommend hooking up a 2 wire to a 3 wire header ...I don't want to be responsible for that.

Lastly ...you are sure this is only a 2 pin connector/ 2 wire... I don't doubt you ...it's just I have never seen one....lol

That is bizzare...I hope you get word from gigabyte...they are suposed to be great boards and customer service.

GOOD LUCK

CoL2k3

the adapter that came with the xigmatek is a molex to 3 pin header, exccept only 2 cables come out of the 3 pin header (red and black), the third hooks to an empty space not hooked to any cable.
i guess thats how its suposed to work cause the third cable is the one that gives speed info and etc, and the psu wouldnt be able to tell that, just give power, my case fan is the same, its hooked directly to the psu and gives no fan speed reading, but always spins at the max speed.

i do think hooking the cooler (4 pin/4 wire) to one of the board many system fan headers (3 pin/3 wire) would be better (than the actual system having 4 pin/4wire hooked to 3 pin/2 wire and only gettin power but no fan speed reading) tho, cause it would auto start and stay full speed just like it is right now hooked to the psu, and more importantly i could get a fan speed reading, even if it said "system fan 1" i would know is the one cooling the cpu. what so you think how would it be worse/more dangerous than just having it hooked to the psu?

gigabyte service is terrible, i emailed them telling them everything detailed and that i tried 2 different coolers, and that they work perfectly on other boards, and that they work perfectly hooked to the psu directly, and the delay only comes when i hook anything to the 4 pin header on their board, and their reply was something like "you should try intel stock cooler and not an aftermarket one, have you tried it on other board? maybe it is the cooler". I emailed them again, i will provide the answer

cp_ent

Ok since I never knew the cpu fan was only a 2 wire...I am going to look at mine as I have ditched the stock unit for a much better one ...I can just pull it from the parts box....Sure enough 3 pin 3 wire....
Can you get a different fan ? what does Gigabyte say use the stock Intel unit ...does it have 3 or four wire?

There are tons of fans out there...the cheapest way to fix I think...Lots with a 3 wire header as far as I know..Check your better electronics stores... Not Radio Schack. Or Fry's .com / E-bay..

That sucks when you buy a better heatsink / fan and it just don't work ....Contact the fan/heatsink folks and see if they have a solution.

I checked them out ...Dutch or Finish or Swedish ?????

Check these out
http://www.coolitsystems.com/index.p...d=13&Itemid=28

CoL2k3

sorry i think you didnt get my point, or i didnt make myself clear

Xigmatek SD1283, 4 pin / 4 wire
intel stock cooler 4 pin / 4 wire

gigabyte board cpu fan header 4 pin header
gigabyte board system/power fan headers 3 pin headers

adapter to hook the cpu cooler to the psu = 3 pin / 2 wire header to molex

hooking either cooler to the gigabyte directly to the cpu fan header = delay

hooking either cooler to the psu ( connecting the cooler's own 4 pin / 4 wire to a molexTHROUGH an adapter that is only 3 pin / 2 wire) = no delay, but also no fan speed reading since only the power and ground cables are actually gettin connected to the psu


alternative? how about hooking the 4 pin/ 4 wire cpu cooler (either intel stock, or the aftermarket xigmatek) to any of the 3 pin headers on the board for either system fan or power fan etc, i dont see how this would be any harm specially since right now is only tecnically using 2 wires and is working fine, anyone has any input on this or have hooked the cpu cooler to a system or power fan header?

cp_ent

Ok fine if you want to try it ....but which wire to which side of the header?

Another thought is orient and color match for alignment...the wires should be the same on all fans. Red in the middle black and white to the sides...

I guess I am not understanding why the stock one won't give you a no delay and rpm reading.

I am understanding that the aftermarket fan has only 2 wires....I do understand that it works fine on hi speed but you can not adjust speed and have no way to tell what speed it is running.

They sell aftermarket fan controls that you install in a drive bay with all kinds of fancy dials and lights...maybe this would be a solution for you.

Personally I would not have purchased the cooler you have due to it's incompatability with the Mobo.
I bought a coolit and have had it for 3 weeks now ...freakin awesome

Good luck to you ...I hope you find a solution. get another fan with a four pin lead ...switch out the 2 wire fan....lol...or chuck it in the trash...J/K

cp_ent

I re-read your last post ...I know all the mobo books say to have a fan hooked up to the cpu header ...but as long as the fan came on immediately and the voltage was correct , ie; 12 volts....maybe you could do that ....I mean how hard is it to try it for 10-30 seconds with the case open and trying to get a speed reading ...? If it didn't behave you just shut down ASAP...then try another header after letting it cool for 10 minutes if it did get too hot.

Do you get a temp reading program? That runs on O/S ...not bios

Tell me what a four pin header/ wire do, that a 3 pin does'nt?

CoL2k3

ok gigabyte told me to rma the board since it "shouldnt work that way" altho ive read about a bunch of people mentioning it online, yet most posts i read around people claimed "thats how it suposed to work", im rejecting gigabyte's offer for now since i cant stay without the pc for weeks or so, whenever i get some time, or get a temporary pc replacement ill rma it.

They also said it should work if i plug the cpu fan on the system fan header wich im doing right now, and i now at least can get a fan speed reading (unlike when i had it plugged directly to the psu), so im keeping it this way.

plugged to system fan header, no delay anymore.


cpu fan header not working as it should, maybe a future bios revision (theres been a few released so far tho) will fix it.


thanks everyone for your help

misblay

Sorry for late answer. But the same thing goes on for me.

I have a Gigabyte P35-S3L and I have the same problem. CPU Fan delays about 3 seconds. But my fan never turns before it starts working. I tried to solve this as the way you did -connecting CPU fan to system fan connection- and it seemed solved until I see 70C as CPU temp.

What to do now? What may cause this temp problem?