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IDProjectCategoryView StatusLast Update
0001952SpeedFanFan controlpublic2013-05-27 17:37
Reportermvendert2 Assigned Toalfredo  
Status acknowledgedResolutionopen 
PlatformPCOSWindows 7OS Version64bit
Product Version4.46 beta 
Summary0001952: After display turnoff (power plan - 15 minutes) ATI GPU temp shows -999 and fanspeed shows 0
DescriptionI have a new ATI 7970 Saphire video card. Whenever the screen goes to sleep (c.q. turned of by the power plan), and is awakened afterwards (from being black) the temp reading on the gpu shows -999 and the fan shows 0 rpm.
(I do never let the computer go to sleep).
Only stopping and restarting fanspeed will show the temperature and fanspeeds again.
TagsNo tags attached.
Motherboard ModelASUS P8z68 deluxe gen3
Video Card ModelSaphire ATI, 7970, driverdate 1202


related to 0002120 acknowledgedalfredo Power saving mode messes up GPU temp sensors 



2012-03-29 17:55

reporter   ~0006917

I have a similar rig and have the same problem

W7 64bit
4.46 beta 6
ATI 7950 GFX card (Powercolor)

Sleep and wake results in -999 for GPU temp. Fixed by exit and reload of speedfan


2012-11-13 21:45

reporter   ~0007105

Speedfan 4.47
W7 64bit
ATI Radeon 4850 GFX (MSI)
Asus P5Q Deluxe

I am also seeing this, and restarting speedfan fixes it.

I also see it when going in through Remote Desktop. When I restart speedfan in this case, the GPU does not appear at all.

ERROR: Fan Controller 1 can't find PWM (ATI Video Card@$0(onISA@$290))
Can't find temperature sensor (1 from ATI Video Card@$0(onISA@$290))
Loaded 0 events


2012-11-13 23:28

reporter   ~0007106

Well, +1 though I wrote it there already ( It seems like W7 x64 problem here. And there is a way to set up minimum fan speed at least 20% just to be sure the card won't burn out))


2012-11-23 11:36

manager   ~0007116

I performed some tests with the latest ATI drivers and didn't experience this issue. Is it still alive for you?


2012-11-27 08:36

reporter   ~0007127

Last edited: 2012-12-03 21:53

Yes it does. Yesterday I've restarted speedfan again because of this. And of course this is a strange bug. Sometimes it happens after a few minutes, but sometimes is still working fine after many hours in this state.

Upd. Once again:
Latest beta driver installed, though the behavior was the same with WHQL version.


2012-12-21 21:58

reporter   ~0007153

Last edited: 2012-12-21 22:00

I have the same issue, When the screens (I have three in Eyefinity mode) wakes up from standby the temp of the GPU is to -999 degrees according to SpeedFan. After stooping and restarting SpeedFan the temperature is back to "normal" again. I am using the latest version of ATI:s drivers and I am using Windows 7 x64.


2013-01-02 12:40

reporter   ~0007165

I don't have Speedfan automatically control the fan speeds on my HD 7770, I let CCC take care of that. I'm not sure how much protection that can actually afford my card from a beta program, but as I said in my one bug report on this issue (was unable to find a precedent on this, bad google search I guess), this still works better for me than the 447 version of this program.


2013-01-04 15:36

reporter   ~0007170

I have a very similar issue. When letting the computer run for a longer time (several hours) under load (FaH), most times GPU temperature will change to -999 degrees. It does not change until I restart speedfan.

Some other observations:
Other tools (GPU-Z/MSI afterburner) still reports correct temperature if started beforehand.
The issue seems to appear independent of if tools reading GPU temperature are started or not

System spec:
Speedfan 4.47
Windows 7 x64
ASUS 5850
No CCC installed
Latest ATI drivers
Gigabyte motherboard


2013-01-25 10:06

reporter   ~0007176

Last edited: 2013-01-25 10:09

Same thing here. Occurs after some hours idling. I'ts a bit more critical than "Minor" to me because speedfan is handling my gpu's fan speed.

System spec:
Speedfan 4.47
Windows 7 x64
CCC installed
Latest ATI drivers


2013-01-25 22:53

reporter   ~0007177

Hm. Maybe it's happening only when speedfan controls GPU, because there is no problems with the readings when MSI Afterburner does the thing and speedfan only reads the temperature.


2013-01-25 23:21

reporter   ~0007178

Last edited: 2013-01-27 14:40

No it isn't, because speedfan don't control my GPU Fan. I removed my physical GPU fan and I make speedfan control the "chassis FAN" instead. In Speedfan the GPU Fan is not activated.

I can add that the problem can occur even when the pc is not idle


2013-02-18 12:01

reporter   ~0007183

Last edited: 2013-02-18 12:02

Do you think that MSI Afterburner could be in conflict with Speedfan while reading the temp?
How can I help in solving this bug, that is critical to me?


2013-02-18 19:49

reporter   ~0007184

No. Speedfan had wrong readings even before I've installed Afterburner. The problem is "W7 x64 + speedfan" only.


2013-05-27 17:37

reporter   ~0007233

That's weird, I don't know if it is thanks to new AMD drivers or the removal of Afterburner, but the problem has disappeared.

Issue History

Date Modified Username Field Change
2012-03-11 23:12 mvendert2 New Issue
2012-03-11 23:12 mvendert2 Status new => assigned
2012-03-11 23:12 mvendert2 Assigned To => alfredo
2012-03-29 17:55 dhaider Note Added: 0006917
2012-11-13 21:45 chilly Note Added: 0007105
2012-11-13 23:28 MaxusR Note Added: 0007106
2012-11-23 11:36 alfredo Note Added: 0007116
2012-11-23 11:36 alfredo Status assigned => acknowledged
2012-11-27 08:36 MaxusR Note Added: 0007127
2012-12-03 21:53 MaxusR Note Edited: 0007127
2012-12-21 21:58 Hasse Note Added: 0007153
2012-12-21 21:59 Hasse Note Edited: 0007153
2012-12-21 22:00 Hasse Note Edited: 0007153
2013-01-02 12:40 astor1977 Note Added: 0007165
2013-01-04 15:36 t90tho Note Added: 0007170
2013-01-25 10:06 Founkk Note Added: 0007176
2013-01-25 10:07 Founkk Note Edited: 0007176
2013-01-25 10:09 Founkk Note Edited: 0007176
2013-01-25 10:09 Founkk Note Edited: 0007176
2013-01-25 22:53 MaxusR Note Added: 0007177
2013-01-25 23:21 Founkk Note Added: 0007178
2013-01-25 23:22 Founkk Note Edited: 0007178
2013-01-27 14:40 Founkk Note Edited: 0007178
2013-02-18 12:01 Founkk Note Added: 0007183
2013-02-18 12:02 Founkk Note Edited: 0007183
2013-02-18 19:49 MaxusR Note Added: 0007184
2013-05-27 16:48 alfredo Relationship added related to 0002120
2013-05-27 17:37 Founkk Note Added: 0007233