MP 1,1-5,1 Mac Pro 5 shutting down randomly

[enjoycompany]

Problem seems to be less when in the Aircon of my workshops so something is overhearing below is the log


1.0.0d1

com.apple.AppleFSCompression.!

Unable to gather system configuration information.Model: MacPro5,1, BootROM MP51.007F.B03, 4 processors, Quad-Core Intel Xeon, 2.8 GHz, 8 GB, SMC 1.39f11

Graphics: ATI Radeon HD 5770, ATI Radeon HD 5770, PCIe, 1024 MB

Memory Module: DIMM 1, 4 GB, DDR3 ECC, 1066 MHz, 0x0198, 0x393936353431332D3030362E4130304C4620

Memory Module: DIMM 2, 4 GB, DDR3 ECC, 1066 MHz, 0x0198, 0x393936353431332D3030362E4130304C4620

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.106.198.19.22)

Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports

Network Service: Ethernet 2, Ethernet, en1

Network Service: Wi-Fi, AirPort, en2

PCI Card: ATI Radeon HD 5770, sppci_displaycontroller, Slot-1

Serial ATA Device: HL-DT-ST DVD-RW GH61N

Serial ATA Device: WDC WD1001FALS-403AA0, 1 TB

USB Device: USB Multimedia Keyboard, 0x04ca (Lite-On Technology Corp.), 0x0050, 0x3a200000 / 2

USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x5a100000 / 2

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x5a110000 / 3

USB Device: Apple Optical USB Mouse, apple_vendor_id, 0x0307, 0x5d100000 / 2

FireWire Device: built-in_hub, 800mbit_speed

 

[h9826790]

Did you monitor the temperature? In general, you should hear some crazy fan noise before the Mac Pro overheat.

 

[enjoycompany]

It does not seem to be especially hot but shutting down when not run in aircon, after discussing with an apple tech they agreed that I should reapply thermal paste to quad core before looking at new power supply or GPU. Have tested drives, RAM and Radeon card and reset vram etc. Was hoping that someone could help me decipher the log I posted to see if it points to anything specific

 

[h9826790]

Install iStat (Free), and monitor the temperature. Then stress your Mac, monitor the temperature again.
(It's better to post some screenshots here, otherwise, not much we can help.)