Fan issue (gpu related?)
Hi,
I bought an 21,5" iMac i3 3,2ghz, 4gb ram, 1TB hdd, ati radeon hd5670 in December 2010 and i love it (my first mac).
I haven't had any problems at all until a couple of weeks ago when i was playing world of warcraft and the FPS went from 60 to 10 and the fans started to run a bit high. After 30-40 sec the fans and the game went back to normal again for about 3 min then it was full of lag and the fans got going again.
A week after that (i went back playing on my pc for a while because of this) i started WoW again and played for 30 min when the game went unplayable again. But this time the cpu-fan went up to 4000rpm and the optical drive fan to 3600rpm and it never stopped until i shut the computer down.
I searched the internet for similar problems but couldn't find anything related to what i have so i tried sms-reset but with no luck and the apple hardware test said nothing.
3 days ago I decided to give smcfancontrol a try and gave the fans a small boost: Cpu Fan from 1200 up to 2100rpm, the Optical Drive Fan from 999 up to 1850rpm and the Hdd Fan from 1100 up to 1550rpm and this actually worked very well. The temps where low and the gameplay experience where perfect until this morning.
I woke up and turned on the iMac and opened safari when the fans started to blow like crazy and only a shut down could fix it. I run the hardware test and got this message: 4SMC/1/40000000:SMC
I deleted smcfancontrol just in case and tried smc-reset and did the hardware test again and got the same message.
I decided to call Apple for support and they told me to reset the computer to factory-default and i did. The fans blowed like crazy until i got to like 50% of the new install and then they stopped and everything seemed normal after the installation was complete. I ran hardware test and the message was gone. I waited a couple of hours and then i installed WoW again and after 5-10 minutes of gameplay the fans started to go wild again. Another hardware check and the message is there again but after the next re-start its gone.
This is the average temperatures i experience when gaming:
CPU: 58c
HDD: 53c
GPU Diode: 82c
GPU Heatsink: 76c
Powersupply: 80c
Temps seems normal to me.
This is driving me crazy and I can't think of other than this is a hardware problem when the computer have worked just fine until a couple of weeks ago.
Is there someone who have experienced anything like this that can give me a helping hand?
I bought an 21,5" iMac i3 3,2ghz, 4gb ram, 1TB hdd, ati radeon hd5670 in December 2010 and i love it (my first mac).
I haven't had any problems at all until a couple of weeks ago when i was playing world of warcraft and the FPS went from 60 to 10 and the fans started to run a bit high. After 30-40 sec the fans and the game went back to normal again for about 3 min then it was full of lag and the fans got going again.
A week after that (i went back playing on my pc for a while because of this) i started WoW again and played for 30 min when the game went unplayable again. But this time the cpu-fan went up to 4000rpm and the optical drive fan to 3600rpm and it never stopped until i shut the computer down.
I searched the internet for similar problems but couldn't find anything related to what i have so i tried sms-reset but with no luck and the apple hardware test said nothing.
3 days ago I decided to give smcfancontrol a try and gave the fans a small boost: Cpu Fan from 1200 up to 2100rpm, the Optical Drive Fan from 999 up to 1850rpm and the Hdd Fan from 1100 up to 1550rpm and this actually worked very well. The temps where low and the gameplay experience where perfect until this morning.
I woke up and turned on the iMac and opened safari when the fans started to blow like crazy and only a shut down could fix it. I run the hardware test and got this message: 4SMC/1/40000000:SMC
I deleted smcfancontrol just in case and tried smc-reset and did the hardware test again and got the same message.
I decided to call Apple for support and they told me to reset the computer to factory-default and i did. The fans blowed like crazy until i got to like 50% of the new install and then they stopped and everything seemed normal after the installation was complete. I ran hardware test and the message was gone. I waited a couple of hours and then i installed WoW again and after 5-10 minutes of gameplay the fans started to go wild again. Another hardware check and the message is there again but after the next re-start its gone.
This is the average temperatures i experience when gaming:
CPU: 58c
HDD: 53c
GPU Diode: 82c
GPU Heatsink: 76c
Powersupply: 80c
Temps seems normal to me.
This is driving me crazy and I can't think of other than this is a hardware problem when the computer have worked just fine until a couple of weeks ago.
Is there someone who have experienced anything like this that can give me a helping hand?
Imac, Mac OS X (10.6.6)
