Fan reving up and down

Gateway Gt5622 desktop
June 10, 2010 at 10:35:36
Specs: Vista Home, Dual Core P4/3gigs
Ok the subject just gives a little bit of info ill give you the rest. Basicly turn computer on, let it sit for a few and then it boots up. During pre and post fan revs up and down and blue power light flashes as the proc fan revs up and down. Heres what I did so far. I cleaned out case. Cleaned out heat sink, fan and reapplied thermal paste. Ive tried three diffrent power supplies and get the same results. Reset bios by taking out battery. I found on the gateway site an update for bios i can flash. Thats the last thing i can think of before ill call it a bad mobo. Anyone else have some suggestions?

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#1
June 10, 2010 at 10:56:56
Does the computer actually boot and run normally?

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#2
June 10, 2010 at 12:21:17
Yes after all that the OS does boot. Also sometimes the blue power light comes on, sometimes it doesnt.

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#3
June 10, 2010 at 12:31:15
Some motherboards control the fan speed as needed to keep up with heat from the processor. It may sense the processor is under load during the boot process and speed the fan up to compensate then slow it down when it is no longer needed.

If the system is booting and running normally I am betting the motherboardis ok. Does the fan change speeds a lot after the computer has booted and allowed to sit idle for a few minutes??


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Related Solutions

#4
June 10, 2010 at 12:46:28
Actually in the health section of the bios there is an option to enable a cpu fan sensor. When i get back to the computer i can tell you exactly what its called. I tried disabling it seeing if maybe that was the problem. And got the same results.
"It may sense the processor is under load during the boot process and speed the fan up to compensate then slow it down when it is no longer needed. "
Yes me too which originally why i thought it was a bad power supply. During idle no its pretty steady. So far it only acts up during logging on and off and of course rebooting

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#5
June 10, 2010 at 14:12:07
Its called CPU smart fan control.

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#6
June 10, 2010 at 14:17:53
Cool and Quiet may be what you are referring to. It simply varies the speed of the fan as needed. If the CPU fan were not detected the computer wouldn't boot.

What are the temperatures as read by the BIOS?


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#7
June 10, 2010 at 16:19:59
system temp is steady at 93f cpu is at 262f. Thats just idling while in bios.

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#8
June 10, 2010 at 17:26:05
The CPU temperature must be wrong or your CPU is frying.

Are you are checking those temps in the BIOS?

262F is 127C. Most CPUs are in danger of frying at 90C.


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#9
June 10, 2010 at 17:42:24
Yep those are the values from the BIOS. 128c/262f. Machines running fine. Its just sitting in bios nice and quiet. Checked to make sure comp isnt locked up. So from a comment above. The mobo could very well be good. Since it boots up fine. No blue screens or erradic behavior. Odd since its vista! Something thats sending info about processor could be faulty. So could this be a prob with bios. I havent flashed it yet with the update i found on gateway site.

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#10
June 10, 2010 at 19:38:19
You have an Intel Dual-Core E2160 Processor. Read 1.1.1 and forward in the article linked below to see what the thermal properties are for that processor.

Either the sensors are wrong or you are killing your processor. If the heat sink is not properly fitted with the proper amount of thermal compound it can overheat. I would have thought the processor should shut itself off before reaching that temperature. Hopefully there is something amiss here. Given that your fan keeps revving up I think you better investigate.

Are you the original owner of the computer? Have you ever removed the heat sink?

http://download.intel.com/design/pr...


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#11
June 11, 2010 at 05:06:29
Yes I agree there's something amiss here. Ive left the computer on all nite and it still working fine. Like is said before. As far as investigation Ive tried swappping out power supplies. The heatsink was caked with crap. In fact i just went and cleaned the whoe case out. Reseated the heatsink onto the proc with new thermal paste. And still get the same results. No this isnt my computer. When I talked to the owner the way she described it i thought it was just a bad powersupply.

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#12
June 11, 2010 at 05:29:38
Are you reading the temperatures from inside the BIOS?

So why did the owner bring the computer to you in the first place? The fan issue?


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#13
June 11, 2010 at 05:49:01
Yes i said this before. These readings are realtime from BIOS. They vary in the beginnng but after a while hold steady. And I do check to make sure the comp didnt lock up. Yes the original issue was the fan reving up and down. There is also a long pause on a cold startup from when you push the power button to when the gateway splash screen appears. Id saya good 3 to 5 mintutes.

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#14
June 11, 2010 at 06:18:55
You state you originally suspected the PSU. Did you check the voltages in the BIOS?

I am pretty sure the thermal sensor is part of the processor, so the motherboard may not be the issue. Possible there could be some glitch in the BIOS that causes erroneous readings.


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#15
June 11, 2010 at 14:00:09
Ill check and get back to you on the voltages Dont think ill get to it tonight. Got home late and got a gig tonight. Ive never seen an issue this bad before. So Ill ask this question. Saying the BIOS could be bad and giving bad data back about proc temp. Could this confuse the system causing the fan to rev up and down eradicly? Though it only acts eradicly during boot. Other wise its nice and quit. Even when BIOS is stating the cpu temp is at 262f

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#16
June 13, 2010 at 07:15:04
Ok heres the voltages from BIOS:
Vcore 1.184v
3vcc 3.248v
Oddly enough the rpms from system and cpu fan arn't registering.

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#17
June 13, 2010 at 07:19:29
There should be additional voltages shown. 5V, +12V.

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#18
August 8, 2010 at 15:41:41
How did you selve the problem ? I am facing exactly same issue for the past couple of days and am going nuts, trying to figure out the root cause.

In addition to the reving up and down fan, the audio stutters and the screen freezes momentarily even in the bios. I am sure this is something to do with the bios setting, but am not able to get up to the root cause.

Any help will be highly appreciated.

Regards,
Ashish


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#19
August 30, 2010 at 22:03:22
I replaced the motherboard and the system is working great

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#20
September 15, 2010 at 22:52:19
Apru: I am the original owner of my Gateway GT5622. Suddenly, after 3 years, I have been dealing with the same issues as you. stuttering, both sound, video and even the clock. I thought... video card, so I bought a new one.....nope. Added 4Gigs RAM........nope. Got a new HDD 500Gig.............nope...... By now I'm starting to get twitchy. I noticed the extreme temps in the BIOS also, so I just put in a huge cooling fan. A SpinQ. Very cool. DL'd a cpu temp monitor the temps vary while idling at 81-86f....As soon as I start up a game of FarCry.....Stuttering again. Well, a MOBO is the only thing left other than a new PSU. Hell I almost have all new guts anyway. May as well build it.

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