Is there a doctor in the house?

[WalnutSpice]

So, my G5 is just problem after problem anymore. I fixed my RAM issues, now rocking 3GB of healthy DDR sticks. I popped in a new healthy 320GB WD Blue drive and cloned a fresh Leopard install to it that I have on a backup 60GB hard drive I keep around.
Now it is much faster and even a tad less noisy (Fans don't run full blast as much anymore) but I still get constant crashes which is leading me to believe a CPU is failing.
What happens before a crash? The program running locks up, one CPU ramps to 80%-100%, and the other goes to 5%-23%. Then I either get a kernel panic (happens most often) or the program crashes.

Heres my most recent error log:

Interval Since Last Panic Report: 54689 sec
Panics Since Last Report: 1
Anonymous UUID: B7053A18-C0D2-4289-B3FD-DE393B66AEDB

Tue Sep 15 17:27:51 2015


Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000004 PC=0x00000000000AC1DC
Latest crash info for cpu 0:
Exception state (sv=0x5dee5c80)
PC=0x000AC1DC; MSR=0x00001030; DAR=0x00000004; DSISR=0x40000000; LR=0x0001ED34; R1=0x54DEFDF0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x00440000 0x00025914 0x000B45CC 0xF36323B3
backtrace terminated - frame not mapped or invalid: 0xF05940C0

Proceeding back via exception chain:
Exception state (sv=0x5dee5c80)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x55234780)
PC=0x90694078; MSR=0x0200F030; DAR=0x01467004; DSISR=0x40000000; LR=0x9069AFA0; R1=0xF05940C0; XCP=0x00000030 (0xC00 - System call)

BSD process name corresponding to current thread: Safari

Mac OS version:
9L31a

Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC
System model name: PowerMac7,3

System uptime in nanoseconds: 3040545737652
unloaded kexts:
com.apple.driver.Apple02DBDMAAudio 2.5.8f1 - last unloaded 3036764431
loaded kexts:
com.apple.filesystems.autofs 2.0.2 - last loaded 751532053
com.apple.GeForcePPC 5.4.8
com.apple.driver.AudioIPCDriver 1.0.6
com.apple.driver.AppleTopazAudio 2.5.8f1
com.apple.driver.AppleTAS3004Audio 2.5.8f1
com.apple.driver.AppleTexasAudio 2.5.8f1
com.apple.driver.AppleTexas2Audio 2.5.8f1
com.apple.driver.AppleDACAAudio 2.5.8f1
com.apple.driver.AppleK2Fan 1.0.10f1
com.apple.driver.AppleSCCSerial 1.3.2
com.apple.driver.AppleFCU 1.3.2b0
com.apple.driver.AppleFan 1.0.10f1
com.apple.driver.AppleADT746x 1.0.10f1
com.apple.driver.AppleHWSensor 1.9d0
com.apple.nvidia.nv30hal 5.4.8
com.apple.driver.AppleCPUVoltage 1.5.2d0
com.apple.iokit.IOFireWireIP 1.7.7
com.apple.driver.AppleVSP 2.2.2
com.apple.driver.AppleThermal 1.0.1f2
com.apple.driver.AppleSEP 1.3.0
com.apple.driver.AppleK2Driver 1.7.2f1
com.apple.driver.AppleSlewClock 1.5.2d0
com.apple.driver.AppleHWClock 1.5.2d0
com.apple.driver.AppleADM103x 1.0.10f1
com.apple.driver.PowerMac7_2_PlatformPlugin 3.4.0d0
com.apple.driver.InternalModemSupport 2.4.0
com.apple.driver.AppleMaxim6690 1.9d0
com.apple.driver.AppleI2S 1.0.1f1
com.apple.driver.AppleAD741x 1.9d0
com.apple.driver.AppleLM7x 1.9d0
com.apple.driver.AppleFileSystemDriver 1.1.0
com.apple.iokit.IOUSBHIDDriver 3.4.6
com.apple.driver.AppleUSBComposite 3.2.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.1.1
com.apple.iokit.SCSITaskUserClient 2.1.1
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOATABlockStorage 2.0.6
com.apple.driver.AppleUSBHub 3.4.9
com.apple.iokit.IOUSBUserClient 3.5.2
com.apple.iokit.IOATAPIProtocolTransport 1.5.3
com.apple.driver.ApplePMU 2.5.6d2
com.apple.driver.AppleK2SATA 1.0.4f2
com.apple.driver.AppleGPIO 1.3.0d0
com.apple.driver.AppleVIA 1.5.1d1
com.apple.driver.MacIOGPIO 1.3.0d0
com.apple.driver.AppleCPUThermo 2.0.0a0
com.apple.driver.AppleMPIC 1.5.3
com.apple.driver.AppleI2C 4.0.0d2
com.apple.driver.AppleK2SATARoot 1.0.5b1
com.apple.iokit.AppleGMACEthernet 1.5.9f1
com.apple.driver.AppleFWOHCI 3.9.7
com.apple.driver.AppleKauaiATA 1.2.1f4
com.apple.driver.AppleUSBEHCI 3.4.6
com.apple.driver.AirPortBrcm43xx 367.91.22
com.apple.driver.AppleUSBOHCI 3.4.6
com.apple.driver.AppleK2 1.7.2f1
com.apple.driver.AppleSPU 2.5.6d2
com.apple.driver.AppleMacRiscPCI 3.4.0
com.apple.driver.AppleCore99NVRAM 1.1.1
com.apple.driver.AppleFlashNVRAM 1.0.5
com.apple.security.seatbelt 107.12
com.apple.nke.appl`

 

[WalnutSpice]

Also, the crashes aren't terribly frequent. I can perfectly use the G5 as my main desktop still. But the crashes are still a thing that I have no idea how to fix.

 

[Altemose]

@WalnutSpice I recommend that you go ahead and do an extensive hardware test using Apple Service Diagnostics (ASD). I believe you need an AASP to source this.

 

[flyrod]

Can you pull one CPU out and see if the problem goes away?

 

[Altemose]

Can you pull one CPU out and see if the problem goes away?

Keep in mind that a G5 requires a CPU to always be in the CPU A position to boot.

 

[WalnutSpice]

Can you pull one CPU out and see if the problem goes away?

I wouldn't know which one to test. Sometimes CPU A will go to 100% and B will go to idle, and sometimes CPU A idles and B runs up towards 100%. And I hear of a lot of people damaging the CPUs even when being very gentle with them, so I wouldn't want to risk it doing that myself. I do have an Apple Extensive Hardware DMG though so I can test it through software. I just need some burnable DVDs.

 

[flyrod]

I wouldn't know which one to test.

I was thinking you could just guess. If the problem is still there, then swap to the other one. There's a CPU preference pane thing around, I think it came with xcode, that lets you disable a CPU in software. That might help diagnose the problem.

 

[flyrod]

Although if you've already seen that it's not processor specific, then it may be something else. Perhaps still related to your earlier RAM issue?

 

[WalnutSpice]

Although if you've already seen that it's not processor specific, then it may be something else. Perhaps still related to your earlier RAM issue?

I'm pretty sure it's not RAM related anymore. When it was, I had loads more issues then I do now. But I'll definitely check disabling a CPU through software.