No Fan Control under Windows causes 70 deg C CPU and GPU

Hi All,

I've seen this issue raised a few times, but never properly addressed. Before the MacOS faithful post any replies, please try actually using Windows under Boot Camp for more than 30~60 minutes. Boot Camp is fine if you install it, boot in Windows for a few minutes novelty value and then restart in MacOS. But if you seriously run Windows for more than half an hour you'll have a mini-stove for frying eggs or boiling water instead of a notebook.

From what I've read online, 2007's "Input Remapper" successfully controlled the fans on that year's MacBooks, but it doesn't work with the late 2008 aluminum unibody MacBook that I have.

The only successful work-around I have is to boot into MacOS, use smcFanControl to ramp up the fans to 5000rpm, then restart in Windows. Adds 5~10 minutes to the boot time, but I haven't found any way to natively control the fans in Windows.

What are other Boot Camp users out there doing to keep their notebook usably cool?

Edit: BTW This problem remains even after applying the recent EFI update 1.3 and SMC update 1.2.

Message was edited by: peterjmacbook

MacBook, Windows Vista

Posted on Dec 25, 2008 4:48 AM

33 replies

T1mur

Level 1

55 points

Jun 28, 2009 2:09 PM in response to lubbbo

Try setting KBDMGR's CPU affinity to CPU1 (not CPU0). This will dramatically reduce its DPC Latencies which may be the source of your "lock-down" problems. Also have a look at HWMonitor by CPUID, obviously they managed to get at least read-access to all of Apple's sensors.

lubbbo

Level 1

0 points

Jun 29, 2009 12:19 AM in response to T1mur

I'll try this evening and I'll let you know.

Thanks a lot!

lubbbo

Level 1

0 points

Jun 30, 2009 12:50 AM in response to T1mur

Sorry, it doesn't work.
It reduce the freezing time to 1 second, but the problem still remains.
It's a weak workaround but not a solution, it's very annoying that the system freeze 1 second every 5 seconds.
I thing the problem it's the concurrently SMC access performed by my application and the kbdmgr.
The only solution seems to be the reimplementation of kbdmgr functionalities in to my app.
BUT, we hope Apple will fix the problem instead.

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No Fan Control under Windows causes 70 deg C CPU and GPU