GPU fan stopped working - main fan overworking to compensate

January 28, 2012 at 08:46:13
Specs: Windows 7, i7-2670QM / 12gb
Hello! Bought a Clevo P150HM from Pro-Star in November, with a gpu upgrade to the AMD Radeon HD 6990M for gaming. Laptop has been fantastic...until last night.

Had been running a couple of hours normally. I jumped into an online game, graphics intensive. The main fan kicked on, and jumped up to high...then stayed there. Hasn't stopped since.

(All the heavy duty gaming I've done to date, that's never happened. The main fan hardly ever comes on, and even if it does it's only for a few if it's stepping into help out a little, and as soon as things cool off, it goes back to normal.)

Quit the game, sent the laptop to hibernate, fan powered down. Brought up from hibernate, fan immediately came on and stayed on at high speed. Tried a couple of reboots, same thing. Shut down and let it sit overnight, turned on this morning, same thing.

Downloaded the speedfan app to take a closer look.
Main fan - not listed
GPU fan - listed at 0% rpm
HD, Core 0, 1, 2, 3 - all display at low to normal temps (blue down arrow)
GPU temp ranges widely - if i'm not using graphics, it's blue down arrow, as graphics use increases, it goes to green checkmark, then red up arrow, then at its hottest in the high 50s shows a little flame. Haha, that can't be good....

From here out, working theories on my part...

Given that speedfan seems to be tracking varying gpu temp changes, and the temps seem appropriate relative to the graphics i'm using at any given time, it seems the thermal sensor is functioning normally.

Speedfan shows the GPU fan at 0% rpm, which suggests it's not working at all.

That seems to fit with what the main fan is doing. GPU heated up last night. GPU fan failed to main fan jumped in to compensate. Maybe the system settings are 'stuck' now, and the main fan doesn't know it's ok to shut off. Or maybe the system is smartly doing what it should - does a safety check on startup, recognizes that the gpu fan isn't operational, and automatically leaves the main fan running to compensate. Main fan is running constantly, so all other components remain at low/normal temps, plenty well cooled.

What do you think? Does that make sense or do you have other ideas about what might be going on? (I sent an email to ProStar support of course, but they're not open until Monday.)

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January 28, 2012 at 09:00:38
Don't trust Speedfan.

Your system is obviously oveheating, but it sounds like its the CPU. Do you use the laptop in a dusty area? See my response here:

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January 28, 2012 at 09:05:51
You can't necessarily believe Speedfan. Those programs rely on being able to read the sensors. They sometimes don't pickup the sensor, or get the wrong sensor. Could very well be the GPU fan is not working but you can hear teh CPU fan and still no reading.

Try HWMonitor to see if it does any better. Get it at the link below.

You could also boot into the BIOS (setup) to see if you have readings in there.

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January 28, 2012 at 09:14:33
Thanks for the suggestions! Just downloaded HWMonitor and also Open Hardware Monitor.

Temps for cores and GPU are consistant across Speedfan, HWMonitor, and Open Hardware.

Fans...that has me stumped. Speedfan lists GPU fan at 0%, doesn't mention a main system fan. HWMonitor lists no fans at all. Open Hardware lists GPU fan at 50% (this never varies, so I don't know how accurate it is).

My assumption as that I have two fans in the system, one dedicated to the GPU and a main/system fan. Am I way off base there?

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Related Solutions

January 28, 2012 at 09:19:11
thanks for the reply, riider.

laptop isn't used in a dusty area. and it's brand new...just got it in november, custom config'd.

also the cpu/cores do not appear to be overheating. three different monitoring apps all show consistent temps, with the hd and core temps all remaining low/normal.

even the gpu temp stays reasonable for the most part (unless i'm doing something graphics intensive). the main fan (i assume it's the main system fan) is constantly on and at high speed, and seems to be doing a great job compensating for (again i'm guessing) a failed gpu fan. as i've been researching the problem on forums, the gpu temp has stayed low/normal.

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January 28, 2012 at 09:21:19
If it would help, I can post screenshots of the monitoring app(s), just let me know.

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January 28, 2012 at 16:35:23
Just tell us what the temps are. Is the CPU over 50C?

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January 28, 2012 at 20:07:15
CPU does not seem to be overheating - all four cores, and the HD, remain in the 30s consistently, usually low 30s, per all three monitoring applications. I haven't seen any of the cpu or hd indicators even approach 50C.

GPU is running hotter though - if i'm just browsing, it's mid to high 30s; if i try gaming it spikes up to low to mid 50s.

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January 29, 2012 at 12:48:02
Most GPUs can tolerate up to 100C. 50C is about normal.

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January 29, 2012 at 16:12:23
Thanks Riider, that's reassuring. At least I'm not likely to fry my GPU using the laptop while I troubleshoot the problem.

Still trying to figure out how to confirm the problem, and fix. My belief is that the GPU fan has failed, and that the main fan is now 'always on' as a safety measure, to compensate.

Short term that might be ok, although it's incredibly loud; the fan does seem to do a good job keeping both the cpu cores and the gpu cool. But longer term, it seems like a lot of wear & tear on the fan.

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January 29, 2012 at 16:14:43
You just bought the laptop so return it or get warranty repair, your choice.

Have you checked the power settings. Could be you are running at full CPU speed all the time, which would make the CPU fan run all the time.

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January 29, 2012 at 17:51:32
Another good tip, thanks. Have three different monitors for cpu/gpu temp, fan speed, and cpu speed. The new new laptop is an i7 quad core, I'm barely touching its processing power - averaging 5-15% across the cores.

I've done a ton of work to configure the laptop, load apps, files, pref settings, etc. So I'd reallllly hate to return it. Warranty repair would be an option, but I'd probably have to ship from Boston to California and wait weeks. Awful.

So crossing fingers, although admittedly it's a long shot, that the company that built it can troubleshoot and remote fix.

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