I was running benchmark,black screen with panic report, if this helps. thanks
Anonymous UUID: 1457A71C-3351-435D-2C28-729D348891B9
Wed Jun 22 22:30:06 2016
*** Panic Report ***
Machine-check capabilities: 0x0000000000000806
family: 6 model: 23 stepping: 6 microcode: 1551
signature: 0x10676
Intel(R) Xeon(R) CPU E5462 @ 2.80GHz
6 error-reporting banks
Processor 0: IA32_MCG_STATUS: 0x0000000000000004
IA32_MC0_STATUS(0x401): 0xf200000410000800
IA32_MC5_STATUS(0x415): 0xf200001044100e0f
Processor 1: IA32_MCG_STATUS: 0x0000000000000004
IA32_MC0_STATUS(0x401): 0xf200000410000800
IA32_MC5_STATUS(0x415): 0xf200001040100e0f
Processor 2: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC5_STATUS(0x415): 0xb200000084200e0f
Processor 3: IA32_MCG_STATUS: 0x0000000000000005
IA32_MC5_STATUS(0x415): 0xb200000080200e0f
panic(cpu 3 caller 0xffffff8013fcf0ba): "Machine Check at 0x00007fff93488325, registers:\n" "CR0: 0x0000000080010033, CR2: 0x000000010f600000, CR3: 0x0000000693416000, CR4: 0x0000000000002660\n" "RAX: 0x00007fff9348830b, RBX: 0x0000000000000004, RCX: 0xfffffffffffff800, RDX: 0x000000000000000c\n" "RSP: 0x0000700000322dc0, RBP: 0x0000700000322dc0, RSI: 0x00000001063aee80, RDI: 0x000000010c25de80\n" "R8: 0x00007fff934882ac, R9: 0x0000000000000000, R10: 0x0000000000000000, R11: 0x000000010c25d280\n" "R12: 0x00000001063ae280, R13: 0x00007fff74d38848, R14: 0x000000010c25d280, R15: 0x00007fff5fbfe7f8\n" "RFL: 0x0000000000000286, RIP: 0x00007fff93488325, CS: 0x000000000000002b, SS: 0x0000000000000023\n" "Error code: 0x0000000000000000\n"@/Library/Caches/com.apple.xbs/Sources/xnu/xnu-3248.50.21/ osfmk/i386/trap_native.c:168
Backtrace (CPU 3), Frame : Return Address
0xffffff8311f5bdd0 : 0xffffff8013edab12
0xffffff8311f5be50 : 0xffffff8013fcf0ba
0xffffff8311f5bfb0 : 0xffffff8013feccff
BSD process name corresponding to current thread: Geekbench 3
Mac OS version:
15F34
Kernel version:
Darwin Kernel Version 15.5.0: Tue Apr 19 18:36:36 PDT 2016; root:xnu-3248.50.21~8/RELEASE_X86_64
Kernel UUID: 7E7B0822-D2DE-3B39-A7A5-77B40A668BC6
Kernel slide: 0x0000000013c00000
Kernel text base: 0xffffff8013e00000
__HIB text base: 0xffffff8013d00000
System model name: MacPro3,1 (Mac-F42C88C8)
System uptime in nanoseconds: 1353921089882
last loaded kext at 244355191020: com.apple.filesystems.msdosfs 1.10 (addr 0xffffff7f94b07000, size 69632)
last unloaded kext at 963234041324: com.apple.driver.AppleFileSystemDriver 3.0.1 (addr 0xffffff7f966a3000, size 8192)
loaded kexts:
com.squirrels.airparrot.framebuffer 5
com.squirrels.driver.AirParrotSpeakers 1.8
com.apple.driver.AppleBluetoothMultitouch 90.3
com.apple.filesystems.ntfs 3.13
com.apple.driver.pmtelemetry 1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.iokit.IOBluetoothSerialManager 4.4.5f3
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHV 1
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleUpstreamUserClient 3.6.1
com.apple.driver.AppleMCCSControl 1.2.13
com.apple.kext.AMDFramebuffer 1.4.2
com.apple.driver.AudioAUUC 1.70
com.apple.driver.AppleHDA 274.9
com.apple.AMDRadeonX4000 1.4.2
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.4.5f3
com.apple.driver.AppleLPC 3.1
com.apple.kext.AMD7000Controller 1.4.2
com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.iokit.SCSITaskUserClient 3.7.7
com.apple.driver.AppleIntel8254XEthernet 3.1.4b1
com.apple.driver.AppleFWOHCI 5.5.4
com.apple.iokit.IOAHCIBlockStorage 2.8.5
com.apple.driver.AirPort.Brcm4360 1040.1.1a6
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0
com.apple.BootCache 38
com.apple.driver.usb.AppleUSBEHCIPCI 1.0.1
com.apple.driver.usb.AppleUSBUHCIPCI 1.0.1
com.apple.driver.AppleAHCIPort 3.1.8
com.apple.driver.AppleIntelPIIXATA 2.5.1
com.apple.driver.AppleACPIButtons 4.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 4.0
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 218.0.0
com.apple.nke.applicationfirewall 163
com.apple.security.quarantine 3
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleIntelCPUPowerManagement 218.0.0
com.apple.driver.IOBluetoothHIDDriver 4.4.5f3
com.apple.driver.AppleMultitouchDriver 304.12
com.apple.driver.AppleHIDTransport 5
com.apple.iokit.IOSurface 108.2.1
com.apple.iokit.IOSerialFamily 11
com.apple.driver.CoreCaptureResponder 1
com.apple.kext.triggers 1.0
com.apple.driver.AppleSMBusController 1.0.14d1
com.apple.driver.DspFuncLib 274.9
com.apple.kext.OSvKernDSPLib 525
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.iokit.IOAcceleratorFamily2 205.10
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.4.5f3
com.apple.iokit.IOBluetoothFamily 4.4.5f3
com.apple.iokit.IOFireWireIP 2.2.6
com.apple.driver.AppleHDAController 274.9
com.apple.iokit.IOHDAFamily 274.9
com.apple.kext.AMDSupport 1.4.2
com.apple.AppleGraphicsDeviceControl 3.12.8
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 6.0.0d7
com.apple.driver.AppleSMC 3.1.9
com.apple.driver.AppleHIDKeyboard 181
com.apple.driver.usb.IOUSBHostHIDDevice 1.0.1
com.apple.driver.AppleUSBAudio 303.3.1
com.apple.iokit.IOAudioFamily 204.4
com.apple.vecLib.kext 1.2.0
com.apple.driver.usb.cdc 5.0.0
com.apple.driver.usb.networking 5.0.0
com.apple.driver.usb.AppleUSBHostCompositeDevice 1.0.1
com.apple.driver.usb.AppleUSBHub 1.0.1
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.7
com.apple.iokit.IOBDStorageFamily 1.8
com.apple.iokit.IODVDStorageFamily 1.8
com.apple.iokit.IOCDStorageFamily 1.8
com.apple.iokit.IOFireWireFamily 4.6.1
com.apple.driver.usb.AppleUSBXHCIPCI 1.0.1
com.apple.driver.usb.AppleUSBXHCI 1.0.1
com.apple.iokit.IOATAPIProtocolTransport 3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.7
com.apple.iokit.IO80211Family 1110.26
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.iokit.IONetworkingFamily 3.2
com.apple.driver.corecapture 1.0.4
com.apple.driver.usb.AppleUSBUHCI 1.0.1
com.apple.driver.usb.AppleUSBEHCI 1.0.1
com.apple.iokit.IOAHCIFamily 2.8.1
com.apple.iokit.IOATAFamily 2.5.3
com.apple.iokit.IOUSBFamily 900.4.1
com.apple.iokit.IOUSBHostFamily 1.0.1
com.apple.driver.AppleUSBHostMergeProperties 1.0.1
com.apple.driver.AppleEFINVRAM 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.driver.AppleEFIRuntime 2.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 300.0
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.AppleKeyStore 2
com.apple.driver.AppleMobileFileIntegrity 1.0.5
com.apple.driver.AppleCredentialManager 1.0
com.apple.driver.DiskImages 417.4
com.apple.iokit.IOStorageFamily 2.1
com.apple.iokit.IOReportFamily 31
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 4.0
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.Libm 1
com.apple.kec.pthread 1
com.apple.kec.corecrypto 1.0