Improper shutdown Mac pro 3.1 (2008)

[Zermy]

Hi, my mac pro does a Improper shutdown on games and shutdown on sleep mode. I have made all the reset (PRAM and SMC). I run on OS10.6.5. I have tried two different video cards (8800GT and HD 4870) same crash here. The apple hardware test find nothing. So now I'm thinking that it's probably the power supply.

Anyone have a idea to help me find out.

Thx

 

[rtrt]

a

 

[Zermy]

Here's the log. I don't see anytings special. But the blue line are not at the good time....

0-11-21 21:51:11 com.apple.backupd[1574] Copied 514 files (734 KB) from volume Macintosh HD.
10-11-21 21:51:11 com.apple.backupd[1574] No pre-backup thinning needed: 1.08 GB requested (including padding), 5.54 GB available
10-11-21 21:51:11 com.apple.backupd[1574] Waiting for index to be ready (100)
10-11-21 21:51:16 com.apple.backupd[1574] Copied 498 files (284 bytes) from volume Macintosh HD.
10-11-21 21:51:18 com.apple.backupd[1574] Starting post-backup thinning
10-11-21 21:51:21 com.apple.backupd[1574] Deleted backup /Volumes/Backup/Backups.backupdb/Mac Pro de Sylvain Hammond/2010-11-20-205114: 5.54 GB now available
10-11-21 21:51:21 com.apple.backupd[1574] Post-back up thinning complete: 1 expired backups removed
10-11-21 21:51:21 com.apple.backupd[1574] Backup completed successfully.
10-11-21 22:06:13 mDNSResponder[18] PenaltyTimeForServer: PenaltyTime negative -3471, (server penaltyTime 1458022925, timenow 1458026396) resetting the penalty
10-11-21 22:49:14 kernel npvhash=4095
10-11-21 22:47:09 Mail[382] IPCClient: Server port 0 is invalid; looking it up again...
10-11-21 22:49:14 kernel PAE enabled
10-11-21 22:49:14 kernel 64 bit mode enabled
10-11-21 22:49:14 kernel Darwin Kernel Version 10.5.0: Fri Nov 5 23:20:39 PDT 2010; root:xnu-1504.9.17~1/RELEASE_I386
10-11-21 22:49:14 DirectoryService[11] Improper shutdown detected
10-11-21 22:49:14 kernel vm_page_bootstrap: 1532366 free pages and 32306 wired pages
10-11-21 22:49:14 kernel standard timeslicing quantum is 10000 us
10-11-21 22:49:14 kernel mig_table_max_displ = 73
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=0 LocalApicId=0 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=1 LocalApicId=1 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=2 LocalApicId=2 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=3 LocalApicId=3 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=4 LocalApicId=6 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=5 LocalApicId=7 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=6 LocalApicId=4 Enabled
10-11-21 22:49:14 kernel AppleACPICPU: ProcessorId=7 LocalApicId=5 Enabled
10-11-21 22:49:14 kernel calling mpo_policy_init for TMSafetyNet
10-11-21 22:49:14 kernel Security policy loaded: Safety net for Time Machine (TMSafetyNet)

 

[cutterman]

Does the machine crash or KP while you are using it? I don't see anything in your log snippet that would explain an improper shutdown. PSU could be the cause of a random shutdown.

 

[Zermy]

Does the machine crash or KP while you are using it? I don't see anything in your log snippet that would explain an improper shutdown. PSU could be the cause of a random shutdown.

Yes it crash like if I disconnect the power. It's not random crash, it's when the video card work harder. By the way it's the same thing in bootcamp win 7 when I play games...

 

[bearcatrp]

You didn't happen to notice your temp when it crashed, did you? Try smcfancontrol. Crank up your fans to cool it better and see what happens.

 

[Zermy]

Yes I already done the SMC blast. All my temps seem to be good. The highest one is the north bridge at 65oC...

 

[cutterman]

Since it occurs with different video cards then sounds like the power supply is the problem.

 

[bearcatrp]

One other thought. Is your Mac pro using a UPS or are you plugged in to the wall socket? One thing about the Mac pro is it will shut down if it detects low power similar to a brown out or on a particular breaker that drops low due to many things running on it. If your plugged into the wall, move it to a different outlet and see if still does it.