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Old Oct 1, 2009, 03:06 AM   #1
handheldgames
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Audio Decoding KILLS MacPro (2009) green factor

Audio Decoding on the 2009 Mac Pro causes the CPU temps to hit near 100% load temperatures and voltage requirements... Yielding a 30(c) rise in temps and a 50w additional power just for the task of Audio playback. Is this an OS X issue or hardware? This issue appears to invalidate major marketing points of the platform.

Its frustrating seeing a MP3 file played in Quicktime, bring the CPU voltage and temps so high.... This Can't be good... Ripping a DVD and listening to music pushes the Core i7 CPU to near 80(c) temps!! Basically bug turns the Mac Pro into a Heat Miser..

In this POST, VIRTUALRAIN took the time to document the severity of the long debated issue with detailed charts and data.

This issue has garnered the time and attention of many MR users and everyone attention to get to the bottom of this apparently Serious issue is greatly appreciated.



(updated)
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Old Oct 1, 2009, 05:31 AM   #2
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Quote:
Originally Posted by handheldgames View Post
Audio Decoding on the 2009 Mac Pro cause the CPU temps to hit near 100% load temperatures and voltage requirements... Is this an OS X issue or hardware?

Its frustrating seeing a MP3 file played in Quicktime, bring the CPU voltage and temps so high.... Can't be good...
It sounds strange, even my old MacBook can play music files without raising the temperatures too much, it will surely increase the fan speeds a bit, but it won't increase the CPU temperatures or workload that much
I would contact Apple.
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Old Oct 1, 2009, 11:08 AM   #3
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Is anyone else with a 2009 MacPro seeing this issue? There was a thread where people were saying their box was running hot.. They thought it was iTunes...

It turns out that any kind of audio decoding causes the increase in heat / Voltage usage. It's not just the built in audio hardware as it happens with that OR a USB based audio system.

Idle: 31(c)

Play Audio for 3 Mins 60(c) - 1% CPU utilization

or

Max all CPU's for 3 Mins 65(c) - 800% CPU Utilization


The temp readings are taken from iStat menus or smcFanControl.
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Old Oct 1, 2009, 11:50 AM   #4
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Extra info would be nice, especially in regards to any controls you maybe did? Just seems like too arbitrary of an evaluation the way you presented it.

Was that 1% utilization an average, peak or minimum value? Did you try any non-decoding sources of utilization to match that and see how those worked? What was the background utilization?

At 800% utilization, have the fans increased in speed at all? What were you maxing out the CPU load with?

I haven't seen any of this discussion about the 2009's running hot, so if this information is already over there in some form or another, just send me that way.

EDIT: Just browsed through the thread about '09's running hot. Where'd you find information that it was audio decoding in general vs. just iTunes?

Has anyone tried running iTunes in minimized mode vs. full window to see if that makes a difference?

Last edited by thehimay; Oct 1, 2009 at 12:11 PM. Reason: Found other info
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Old Oct 1, 2009, 02:03 PM   #5
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Originally Posted by thehimay View Post
Extra info would be nice, especially in regards to any controls you maybe did? Just seems like too arbitrary of an evaluation the way you presented it.

Was that 1% utilization an average, peak or minimum value? Did you try any non-decoding sources of utilization to match that and see how those worked? What was the background utilization?

At 800% utilization, have the fans increased in speed at all? What were you maxing out the CPU load with?

I haven't seen any of this discussion about the 2009's running hot, so if this information is already over there in some form or another, just send me that way.

EDIT: Just browsed through the thread about '09's running hot. Where'd you find information that it was audio decoding in general vs. just iTunes?

Has anyone tried running iTunes in minimized mode vs. full window to see if that makes a difference?

I have a "CLEAN" Snow Leopard partition that isolates any software conflicts. Processor usage was about 1% give or take. Nothing real going on. The fans did not increase when playing audio. When maxing CPU, BOOSTA kicked up to 1200 when CPU hit 65(c) then back down to 1050.

The heat issue showed up with each of the following. No differences.
  • The issue showed up with iTunes as advertised - Internet radio stream and ACC file. CPU cooled/voltage drop when audio stopped. Visualizer caused no difference in temps.
  • Played a MP3 file with Quicktime. CPU cooled/voltage drop when audio stopped.
  • Played a MP3 file with VLC. CPU cooled/voltage drop when audio stopped.

When I run into issues... I generally like to isolate it to the lowest common issue - in this case it is audio decoding / playback.

I know CPUS are made to cook.... But this is excessive....
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Old Oct 1, 2009, 02:45 PM   #6
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On my 2008 MP octo, the highest I'm seeing is 29 degrees C.
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Old Oct 1, 2009, 04:48 PM   #7
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Quote:
Originally Posted by Rainier42 View Post
On my 2008 MP octo, the highest I'm seeing is 29 degrees C.
My 2008 At my office behaves the same. Nice and cool. It's the 2009 at home that's acting odd.
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Old Oct 1, 2009, 04:55 PM   #8
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Decoding of an mp3 file takes approx 60mhz of speed - or about the speed of the first released Pentium chip. Considering you have several cores, each running at 2000+mhz, there is no way in the world listening to an mp3 would use up all your CPU cycles unless there is something strange going on.
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Old Oct 5, 2009, 08:38 PM   #9
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Quote:
Originally Posted by Rainier42 View Post
On my 2008 MP octo, the highest I'm seeing is 29 degrees C.
Really? I mine never gets that low unless I ramp up the fans then I have to put up with the noise!

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Old Oct 5, 2009, 09:22 PM   #10
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Really? I mine never gets that low unless I ramp up the fans then I have to put up with the noise!

Yep... I guess I have a lucky batch of CPU's... Then again I took that reading just after installing a copy of SL Server and the machine was truly running idle... My 2009 is running idle at 31(c) right now.
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Old Oct 1, 2009, 10:51 PM   #11
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Originally Posted by handheldgames View Post
Audio Decoding on the 2009 Mac Pro cause the CPU temps to hit near 100% load temperatures and voltage requirements... Is this an OS X issue or hardware?

Its frustrating seeing a MP3 file played in Quicktime, bring the CPU voltage and temps so high.... Can't be good...
Is the problem from the 3.3GHz QUAD Mac Pro? If so, could it be due to you customizing it?
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Old Oct 1, 2009, 10:59 PM   #12
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Is the problem from the 3.3GHz QUAD Mac Pro? If so, could it be due to you customizing it?
That would be my first guess. I would suggest calling Apple after you have tried to put the original CPU back in if it is a further issue.
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Old Oct 1, 2009, 11:36 PM   #13
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Originally Posted by CubeHacker View Post
All mp3 audio decoding is done in software AFAIK. Sure, the sound is played through the audio hardware, but the physical decoding of the mp3 steam is done by the CPU. However as i said before, it takes very very little power to do that on a computer from 2009.

To run a valid test, you would need to provide us with a link to an mp3 thats causing this problem, state exactly what program you use to listen to the mp3, and your exact stats shown through activity monitor - a screenshot would help.
This happens with any MP3, ACC, or even streaming audio...

Quote:
Originally Posted by jjahshik32 View Post
Is the problem from the 3.3GHz QUAD Mac Pro? If so, could it be due to you customizing it?
I don't think it's from the customization as Cynicalone as the 2.93 and is seeing the same issue.


Quote:
Originally Posted by Techhie View Post
That would be my first guess. I would suggest calling Apple after you have tried to put the original CPU back in if it is a further issue.
Hey Techie... What temps are you seeing?


Quote:
Originally Posted by Cynicalone View Post
I have always thought it was a problem with iTunes. I see a 15 to 20 degree temperature increase when using iTunes to listen to music.

2009 Mac Pro
2.93 Octo Core
32GB of RAM
iTunes 9.0.1
OS X 10.6.1

In the time it took to type this it went from 49º Celsius to 60º Celsius listening to music with iTunes.
A 15-20 degree jump in temp, along with the increase in voltage makes no sense for playing music... When typing this I just saw my system go from 29 to 53 and its still climbing. This is with Quicktime player and with no visualizer to throw it off. Also playing out through the built-in speaker.
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Old Oct 2, 2009, 01:55 AM   #14
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How are you getting CPU voltage readings?
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Old Oct 2, 2009, 05:24 AM   #15
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Hmm, on my 2009 MP, the CPU temp jumps from about 36C to 50C when playing iTunes.
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Old Oct 1, 2009, 10:58 PM   #16
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Audio Decoding on the 2009 Mac Pro cause the CPU temps to hit near 100% load temperatures and voltage requirements... Is this an OS X issue or hardware?

Its frustrating seeing a MP3 file played in Quicktime, bring the CPU voltage and temps so high.... Can't be good...
The major difference with your system is that you replaced your stock CPU with a Core i7 975 Extreme. While this may not be the cause of your issues, it is sufficiently different from most Mac Pro systems. After playing two songs in iTunes while simultaneously running the classic visualizer and enabling the equalizer, my CPU temps hover around 57C. I am running on a Xeon W3580 @ 3.3 GHz.

Do you have the original Xeon that shipped with your Mac Pro? If so, I would suggest swapping it back in and see how things go. Also, when you put in the Core i7 975, did you apply your thermal paste as indicated here (see lower right corner for Core i7)? It needs to be applied in line with the core placement.
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Old Nov 18, 2009, 04:03 AM   #17
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Audio Decoding on the 2009 Mac Pro cause the CPU temps to hit near 100% load temperatures and voltage requirements... Is this an OS X issue or hardware?

Its frustrating seeing a MP3 file played in Quicktime, bring the CPU voltage and temps so high.... Can't be good...
Also you did put 3.33ghz chips in there, which could easily have unintended consequences...
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Old Nov 18, 2009, 10:56 AM   #18
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Also you did put 3.33ghz chips in there, which could easily have unintended consequences...
Did you even bother to read through this thread before responding? Have you noted that this issue can be replicated on ANY 2009 Mac Pro regardless of the type of CPU?
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Old Nov 18, 2009, 02:57 PM   #19
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Also you did put 3.33ghz chips in there, which could easily have unintended consequences...

My initial results are in line with many other members... The issue looks solid across all current i7 CPUs on te mac pro architecture. Too early to tell about late 2009 iMacs.
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Old Nov 20, 2009, 02:09 AM   #20
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Surprisingly, watching a Silverlight webpage is less taxing on the CPU than a Flash based one.

I talked to a few Apple repair vendors here in Singapore. It is very frustrating to explain to them the issue and it is even more troublesome to bring down the machine and keep repeating myself. I keep hearing it is within normal operating temperature...

I wonder how the audio guys are coping with this machine. Blast off those fans ya?
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Old Nov 23, 2009, 11:18 PM   #21
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Interesting thread underway here:

http://discussions.apple.com/thread....art=0&start=30

Somebody's MP is reaching 94C and shutting down as a result of this problem.
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Old Nov 24, 2009, 02:57 PM   #22
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Originally Posted by smacman View Post
Interesting thread underway here:

http://discussions.apple.com/thread....art=0&start=30

Somebody's MP is reaching 94C and shutting down as a result of this problem.
Unless a magical update happens, aka OSX gets fixed... WAKEUP APPLE!!! , The 2009 MP is turning out as the LEMON step child of the product line.
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Old Feb 5, 2010, 12:16 PM   #23
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Thank god I found this topic!
I didn't knew there were so many people complaining about the early 2009 MacPro.I saw the post at macrumors about all this heating of CPU on audio playing and I thought maybe this is my case.Cause since last May I have the machine ,I had about 20 kernel panics,even when only application was in use(I don't remember which one each time,sometimes only transmission for example).ost of the times the KPs was like this:
Sat Jul 4 11:05:12 2009
Machine-check capabilities (cpu 5) 0x0000000000001c09:
family: 6 model: 26 stepping: 5 microcode: 15
Intel(R) Xeon(R) CPU W3520 @ 2.67GHz
9 error-reporting banks
threshold-based error status present
extended corrected memory error handling present
Machine-check status 0x0000000000000004:
machine-check in progress
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000800 invalid
IA32_MC1_STATUS(0x405): 0x0000000000000800 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0000000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0000000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0000000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0000000000000000 invalid
Package 0 logged:
IA32_MC8_STATUS(0x421): 0xfe18b9000001009f valid
Channel number: 15 (unknown)
Memory Operation: read
Machine-specific error: Read ECC
COR_ERR_CNT: 17864
Status bits:
Processor context corrupt
ADDR register valid
MISC register valid
Error enabled
Uncorrected error
Error overflow
IA32_MC8_ADDR(0x422): 0x0000000033577100
IA32_MC8_MISC(0x423): 0x782ffa7700080482
DIMM: 0
Channel: 2
Syndrome: 0x782ffa77
panic(cpu 5 caller 0x001AAA68): Machine Check at 0x155a6534, thread:0x5ef5000, trapno:0x12, err:0x0, registers:
CR0: 0x80010033, CR2: 0x15890000, CR3: 0x011e0000, CR4: 0x00000660
EAX: 0x00003d5a, EBX: 0x155a839b, ECX: 0x0000ffe0, EDX: 0x00000010
ESP: 0xb01d9e40, EBP: 0xb01d9e58, ESI: 0x0000000c, EDI: 0x1589e0d0
EFL: 0x00000206, EIP: 0x155a6534

Backtrace (CPU 5), Frame : Return Address (4 potential args on stack)
0x427b6fb8 : 0x12b4c6 (0x45ec20 0x427b6fec 0x13355c 0x0)
0x427b7008 : 0x1aaa68 (0x468bc0 0x155a6534 0x5ef5000 0x12)
0x427b70e8 : 0x1a2553 (0x427b7100 0x401ff4ab 0x803fe956 0x7fd2ad)
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb01d9e58

BSD process name corresponding to current thread: StuffIt Expander

Mac OS version:
9J61

Kernel version:
Darwin Kernel Version 9.7.0: Tue Mar 31 22:52:17 PDT 2009; root:xnu-1228.12.14~1/RELEASE_I386
System model name: MacPro4,1 (Mac-F221BEC8)

System uptime in nanoseconds: 1089428758495
unloaded kexts:
com.apple.driver.AppleBluetoothHIDMouse 1.2.3f1 - last unloaded 913612625979
loaded kexts:
com.intego.iokit.VirusBarrierService 10.5.8
com.google.filesystems.fusefs 2.0.3
com.parallels.kext.prl_vnic 4.0 3844.408728
com.parallels.kext.prl_netbridge 4.0 3844.408728
com.parallels.kext.prl_usb_connect 4.0 3844.408728
com.parallels.kext.prl_hid_hook 4.0 3844.408728
com.parallels.kext.prl_hypervisor 4.0 3844.408728
com.Cycling74.driver.Soundflower 1.3.1
com.deepseasoftware.driver.CDSDAudioCaptureSupport 1.3
com.apple.driver.AppleBluetoothHIDMouse 1.2.3f1 - last loaded 922524123242
com.apple.driver.AppleHIDKeyboard 1.0.8b1
com.apple.driver.IOBluetoothHIDDriver 2.1.6f8
com.apple.filesystems.autofs 2.0.2
com.apple.iokit.IOBluetoothSerialManager 2.1.6f8
com.apple.driver.AppleUSBHIDMouse 1.2.3f1
com.apple.driver.AppleMikeyHIDDriver 1.0.6
com.apple.driver.AppleUpstreamUserClient 2.7.5
com.apple.driver.AppleHDA 1.6.8a3
com.apple.driver.AppleMikeyDriver 1.6.8a3
com.apple.kext.ATY_Motmot 5.4.4
com.apple.driver.AppleHWSensor 1.9d0
com.apple.Dont_Steal_Mac_OS_X 6.0.3
com.apple.driver.AGPM 100.6.5
com.apple.driver.AppleTyMCEDriver 1.0.0d28
com.apple.driver.AppleHDAController 1.6.8a3
com.apple.driver.AudioIPCDriver 1.0.6
com.apple.ATIRadeonX2000 5.4.4
com.apple.driver.AppleUSBAudio 2.6.4b10
com.apple.driver.ACPI_SMC_PlatformPlugin 3.4.0d10
com.apple.driver.AppleSMBusPCI 1.0.1d1
com.apple.driver.AppleLPC 1.2.12
com.apple.iokit.IOFireWireIP 1.7.7
com.apple.driver.BroadcomUSBBluetoothHCIController 2.1.6f8
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOAHCIBlockStorage 1.2.1
com.apple.driver.AppleUSBMergeNub 3.4.3
com.apple.iokit.IOUSBMassStorageClass 2.0.6
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.0.9
com.apple.iokit.SCSITaskUserClient 2.0.9
com.apple.driver.AppleFWOHCI 3.8.2
com.apple.iokit.IOAHCISerialATAPI 1.1.1
com.apple.driver.AppleUSBHub 3.4.0
com.apple.driver.AirPortBrcm43xx 363.35.0
com.apple.driver.Intel82574L 1.0.1b40
com.apple.iokit.IOUSBUserClient 3.3.1
com.apple.driver.AppleAHCIPort 1.6.0
com.apple.driver.AppleUSBEHCI 3.4.3
com.apple.driver.AppleUSBUHCI 3.3.5
com.apple.driver.AppleEFINVRAM 1.2.0
com.apple.driver.AppleRTC 1.2.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleACPIPCI 1.2.4
com.apple.driver.AppleACPIButtons 1.2.4
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.2.4
com.apple.driver.AppleAPIC 1.4
com.apple.security.seatbelt 107.12
com.apple.nke.applicationfirewall 1.6.77
com.apple.security.TMSafetyNet 3
com.apple.driver.AppleIntelCPUPowerManagement 76.0.0
com.apple.driver.DiskImages 199
com.apple.BootCache 30.4
com.apple.iokit.IOSerialFamily 9.4
com.apple.iokit.IOUSBHIDDriver 3.2.2
com.apple.driver.AppleHIDMouse 1.2.3f1
com.apple.driver.DspFuncLib 1.6.8a3
com.apple.driver.AppleSMBusController 1.0.1d1
com.apple.iokit.IOHDAFamily 1.6.8a3
com.apple.iokit.IONDRVSupport 1.7.3
com.apple.iokit.IOGraphicsFamily 1.7.3
com.apple.iokit.IOAudioFamily 1.6.9fc3
com.apple.kext.OSvKernDSPLib 1.1
com.apple.driver.IOPlatformPluginFamily 3.4.0d10
com.apple.driver.AppleSMC 2.2.1d2
com.apple.driver.AppleUSBBluetoothHCIController 2.1.6f8
com.apple.iokit.IOBluetoothFamily 2.1.6f8
com.apple.driver.AppleUSBComposite 3.2.0
com.apple.iokit.IOSCSIBlockCommandsDevice 2.0.9
com.apple.iokit.IOBDStorageFamily 1.5
com.apple.iokit.IODVDStorageFamily 1.5
com.apple.iokit.IOCDStorageFamily 1.5
com.apple.iokit.IOFireWireFamily 3.4.7
com.apple.iokit.IOSCSIArchitectureModelFamily 2.0.9
com.apple.iokit.IO80211Family 216.1
com.apple.iokit.IONetworkingFamily 1.6.1
com.apple.iokit.IOAHCIFamily 1.5.0
com.apple.iokit.IOUSBFamily 3.4.3
com.apple.driver.AppleEFIRuntime 1.2.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.iokit.IOStorageFamily 1.5.6
com.apple.iokit.IOHIDFamily 1.5.5
com.apple.driver.AppleACPIPlatform 1.2.4
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.2.0

Can anyone tell me if my situation is alike the ones almost everyone is complainning,about that audio-CPU temperature thing?
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Old Feb 5, 2010, 12:53 PM   #24
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Originally Posted by jokons View Post
Thank god I found this topic!
I didn't knew there were so many people complaining about the early 2009 MacPro.I saw the post at macrumors about all this heating of CPU on audio playing and I thought maybe this is my case.Cause since last May I have the machine ,I had about 20 kernel panics,even when only application was in use(I don't remember which one each time,sometimes only transmission for example).ost of the times the KPs was like this:
Sat Jul 4 11:05:12 2009
Machine-check capabilities (cpu 5) 0x0000000000001c09:
family: 6 model: 26 stepping: 5 microcode: 15
Intel(R) Xeon(R) CPU W3520 @ 2.67GHz
9 error-reporting banks
threshold-based error status present
extended corrected memory error handling present
Machine-check status 0x0000000000000004:
machine-check in progress
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000800 invalid
IA32_MC1_STATUS(0x405): 0x0000000000000800 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0x0000000000000000 invalid
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0000000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0000000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0000000000000000 invalid
Package 0 logged:
IA32_MC8_STATUS(0x421): 0xfe18b9000001009f valid
Channel number: 15 (unknown)
Memory Operation: read
Machine-specific error: Read ECC
COR_ERR_CNT: 17864
Status bits:
Processor context corrupt
ADDR register valid
MISC register valid
Error enabled
Uncorrected error
Error overflow
IA32_MC8_ADDR(0x422): 0x0000000033577100
IA32_MC8_MISC(0x423): 0x782ffa7700080482
DIMM: 0
Channel: 2

Syndrome: 0x782ffa77
panic(cpu 5 caller 0x001AAA68): Machine Check at 0x155a6534, thread:0x5ef5000, trapno:0x12, err:0x0, registers:
CR0: 0x80010033, CR2: 0x15890000, CR3: 0x011e0000, CR4: 0x00000660
EAX: 0x00003d5a, EBX: 0x155a839b, ECX: 0x0000ffe0, EDX: 0x00000010
ESP: 0xb01d9e40, EBP: 0xb01d9e58, ESI: 0x0000000c, EDI: 0x1589e0d0
EFL: 0x00000206, EIP: 0x155a6534
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Hi Ya

This KP is received by many with Mac Pros including myself, I cured it by removing the Mem stick in Slot 3 which is
DIMM: 0
Channel: 2


Have not tried running my machine cooler with the Mem stick in that slot.

This Particular KP I believe is a CPU Mem call so heat could be the cause I suppose, somebody here will confirm that I would think.
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Old Feb 5, 2010, 01:10 PM   #25
beto2k7
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Join Date: Jan 2010
Location: ::1
I just emailed sjobsATappleDOTcom. I don't expect anything to happen... I'm just starting to lose hope after two months. Thanks for the incredible effort of Smacman, concorde rules, cl-user, nanofrog and basically everyone else that has made any contribution in clarifying this issue.
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