Mac Pro 5 shutting down randomly

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,...

Mac Pro 5 shutting down randomly