MacPro 2014 freezes on FCPX and restarts

MacPro 2014 freezes on FCPX and restarts automatically in 5 sec. after that i got this screen

what kind of problem i have?

Can't read what the message says but it looks like a kernel panic and most likely a hardware problem.

Crash report:

Thu Sep 4 16:30:42 2014
panic(cpu 4 caller 0xffffff8016cdc24e): Kernel trap at 0xffffff7f98e93644, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000000, CR3: 0x0000000029d24000, CR4: 0x00000000001606e0
RAX: 0xf44f065ce4c800c9, RBX: 0xffffff8065d42980, RCX: 0xffffff8065d429a4, RDX: 0x0000000000000001
RSP: 0xffffff83ce32b960, RBP: 0xffffff83ce32b9d0, RSI: 0xffffff83ce32ba18, RDI: 0xffffff8065d42980
R8: 0xffffff80837ff200, R9: 0xffffff0000000fff, R10: 0xffffff83d04c1248, R11: 0xffffff83f4bbf248
R12: 0x0000000000000000, R13: 0xffffff83f4722000, R14: 0xffffff8065d429a8, R15: 0xffffff83ce32ba18
RFL: 0x0000000000010202, RIP: 0xffffff7f98e93644, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x0000000000000000, Error code: 0x0000000000000000, Fault CPU: 0x4

Backtrace (CPU 4), Frame : Return Address
0xffffff83ce32b5f0 : 0xffffff8016c22f79
0xffffff83ce32b670 : 0xffffff8016cdc24e
0xffffff83ce32b840 : 0xffffff8016cf3746
0xffffff83ce32b860 : 0xffffff7f98e93644
0xffffff83ce32b9d0 : 0xffffff7f98e92f8b
0xffffff83ce32b9e0 : 0xffffff7f98df44a9
0xffffff83ce32bad0 : 0xffffff7f98e0393a
0xffffff83ce32baf0 : 0xffffff7f98df3bc5
0xffffff83ce32bb20 : 0xffffff7f98df3b59
0xffffff83ce32bb40 : 0xffffff7f98e0473e
0xffffff83ce32bb60 : 0xffffff7f98df1c79
0xffffff83ce32bb80 : 0xffffff7f98dbd8cb
0xffffff83ce32bbc0 : 0xffffff7f98da7ac7
0xffffff83ce32bc80 : 0xffffff7f98d4a9be
0xffffff83ce32bcb0 : 0xffffff7f98d67be4
0xffffff83ce32bcf0 : 0xffffff80170921fa
0xffffff83ce32bd50 : 0xffffff80170af71e
0xffffff83ce32bd90 : 0xffffff7f98b222b6
0xffffff83ce32bdf0 : 0xffffff7f98b203a9
0xffffff83ce32be80 : 0xffffff7f98b1d1ef
0xffffff83ce32bf00 : 0xffffff7f98b1e3a2
0xffffff83ce32bf30 : 0xffffff80170af292
0xffffff83ce32bf80 : 0xffffff80170af367
0xffffff83ce32bfb0 : 0xffffff8016cd7417
Kernel Extensions in backtrace:
com.apple.driver.AppleMGPUPowerControl(3.6.22)[9A4AEB2E-5A9D-3343-86F1-6A72B5A05DC1]@0xffffff7f98b13000->0xffffff7f98b2cfff
dependency: com.apple.driver.AppleBacklightExpert(1.0.4)[E04639C5-D734-3AB3-A682-FE66694C6653]@0xffffff7f98b0b000
dependency: com.apple.iokit.IOPCIFamily(2.9)[4662B11D-2ECA-315D-875C-618C97CDAB2A]@0xffffff7f972be000
dependency: com.apple.driver.AppleGraphicsControl(3.6.22)[AA46D551-BE0F-33DA-93A3-8F46197BB36F]@0xffffff7f98b10000
dependency: com.apple.iokit.IOACPIFamily(1.4)[045D5D6F-AD1E-36DB-A249-A346E2B48E54]@0xffffff7f97b00000
dependency: com.apple.iokit.IONDRVSupport(2.4.1)[D41125CE-69BD-32E7-9B1D-4E83431662DD]@0xffffff7f97bf7000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0xffffff7f97bb4000
com.apple.iokit.IOAcceleratorFamily(98.22)[BEFBB731-E445-3C05-AE76-B3E1AF872601]@0xffffff7f98d3d000->0xffffff7f98d95fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[4662B11D-2ECA-315D-875C-618C97CDAB2A]@0xffffff7f972be000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0xffffff7f97bb4000
com.apple.AMDRadeonX4000(1.2.4)[7466CFA7-DD11-3A9D-8EC6-0F5469AC73CB]@0xffffff7f98da2000->0xffffff7f99130fff
dependency: com.apple.iokit.IOAcceleratorFamily(98.22)[BEFBB731-E445-3C05-AE76-B3E1AF872601]@0xffffff7f98d3d000
dependency: com.apple.iokit.IOPCIFamily(2.9)[4662B11D-2ECA-315D-875C-618C97CDAB2A]@0xffffff7f972be000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0xffffff7f97bb4000

BSD process name corresponding to current thread: kernel_task

Mac OS version:
13E28

Kernel version:
Darwin Kernel Version 13.3.0: Tue Jun 3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64
Kernel UUID: BBFADD17-672B-35A2-9B7F-E4B12213E4B8
Kernel slide: 0x0000000016a00000
Kernel text base: 0xffffff8016c00000
System model name: MacPro6,1 (Mac-F60DEB81FF30ACF6)

System uptime in nanoseconds: 14276341168620
last loaded kext at 425828433310: com.apple.filesystems.afpfs 11.1 (addr 0xffffff7f99689000, size 348160)
loaded kexts:
com.promise.driver.stex 5.2.7
com.apple.filesystems.afpfs 11.1
com.apple.nke.asp-tcp 8.0.1
com.apple.filesystems.smbfs 2.0.2
com.apple.filesystems.exfat 1.4
com.apple.filesystems.msdosfs 1.9
com.apple.iokit.SCSITaskUserClient 3.6.6
com.apple.filesystems.autofs 3.0
com.apple.driver.AppleBluetoothMultitouch 80.14
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AppleUSBCDC 4.2.1b5
com.apple.iokit.IOBluetoothSerialManager 4.2.6f1
com.apple.driver.ApplePlatformEnabler 2.0.9d6
com.apple.driver.AGPM 100.14.28
com.apple.driver.X86PlatformShim 1.0.0
com.apple.driver.AppleHDAHardwareConfigDriver 2.6.3f4
com.apple.driver.AppleUSBDisplays 360.8.14
com.apple.driver.AppleGraphicsDevicePolicy 3.6.22
com.apple.driver.AppleHDA 2.6.3f4
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.driver.AppleMCCSControl 1.2.5
com.apple.kext.AMDFramebuffer 1.2.4
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.iokit.IOBluetoothUSBDFU 4.2.6f1
com.apple.AMDRadeonX4000 1.2.4
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.6f1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleLPC 1.7.0
com.apple.driver.AppleIntelMCEReporter 104
com.apple.kext.AMD7000Controller 1.2.4
com.apple.driver.AppleMGPUPowerControl 3.6.22
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleThunderboltIP 1.1.2
com.apple.driver.AppleFileSystemDriver 3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeLZVN 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.driver.AppleUSBOHCI 656.4.1
com.apple.driver.XsanFilter 404
com.apple.driver.AppleFWOHCI 5.0.2
com.apple.driver.AppleUSBHub 683.4.0
com.apple.iokit.IOAHCIBlockStorage 2.6.0
com.apple.driver.AppleUSBXHCI 683.4.0
com.apple.driver.AirPort.Brcm4360 842.21.65
com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2
com.apple.driver.AppleUSBEHCI 660.4.0
com.apple.driver.AppleAHCIPort 3.0.5
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 217.92.1
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.driver.AppleIntelCPUPowerManagement 217.92.1
com.apple.security.SecureRemotePassword 1.0
com.apple.iokit.IOUSBMassStorageClass 3.6.0
com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.6
com.apple.kext.triggers 1.0
com.apple.driver.IOBluetoothHIDDriver 4.2.6f1
com.apple.driver.AppleMultitouchDriver 245.13
com.apple.driver.AppleUSBHIDKeyboard 170.15
com.apple.driver.AppleHIDKeyboard 170.15
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.driver.AppleUSBAudio 2.9.5f8
com.apple.driver.DspFuncLib 2.6.3f4
com.apple.vecLib.kext 1.0.0
com.apple.iokit.IOAudioFamily 1.9.7fc2
com.apple.kext.OSvKernDSPLib 1.14
com.apple.driver.AppleSMBusController 1.0.12d1
com.apple.iokit.IOSurface 91.1
com.apple.iokit.IOBluetoothFamily 4.2.6f1
com.apple.iokit.IOAcceleratorFamily 98.22
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.6f1
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.AppleHDAController 2.6.3f4
com.apple.iokit.IOHDAFamily 2.6.3f4
com.apple.kext.AMDSupport 1.2.4
com.apple.AppleGraphicsDeviceControl 3.6.22
com.apple.driver.AppleGraphicsControl 3.6.22
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOFireWireIP 2.2.6
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.AppleSMC 3.1.8
com.apple.driver.IOPlatformPluginFamily 5.7.1d6
com.apple.driver.AppleThunderboltEDMSink 2.1.3
com.apple.iokit.IOUSBHIDDriver 660.4.0
com.apple.driver.AppleThunderboltDPInAdapter 3.1.7
com.apple.driver.AppleThunderboltDPOutAdapter 3.1.7
com.apple.driver.AppleThunderboltDPAdapterFamily 3.1.7
com.apple.driver.AppleThunderboltPCIUpAdapter 1.4.5
com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5
com.apple.driver.AppleUSBMergeNub 650.4.0
com.apple.driver.AppleUSBComposite 656.4.1
com.apple.iokit.IOSCSIParallelFamily 3.0.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.6
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.driver.AppleThunderboltNHI 2.0.1
com.apple.iokit.IOThunderboltFamily 3.3.1
com.apple.iokit.IOUSBUserClient 660.4.2
com.apple.iokit.IO80211Family 640.36
com.apple.iokit.IOEthernetAVBController 1.0.3b4
com.apple.driver.mDNSOffloadUserClient 1.0.1b5
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOUSBFamily 683.4.0
com.apple.iokit.IOAHCIFamily 2.6.5
com.apple.driver.AppleEFINVRAM 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.driver.AppleEFIRuntime 2.0
com.apple.security.sandbox 278.11.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages 371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 23
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 2.0
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.pthread 1
com.apple.kec.corecrypto 1.0
Model: MacPro6,1, BootROM MP61.0116.B05, 8 processors, 8-Core Intel Xeon E5, 3 GHz, 32 GB, SMC 2.20f18
Graphics: AMD FirePro D700, AMD FirePro D700, PCIe, 6144 MB
Graphics: AMD FirePro D700, AMD FirePro D700, PCIe, 6144 MB
Memory Module: DIMM1, 8 GB, DDR3 ECC, 1867 MHz, 0x80CE, 0x4D33393342314737305148302D434D412020
Memory Module: DIMM2, 8 GB, DDR3 ECC, 1867 MHz, 0x80CE, 0x4D33393342314737305148302D434D412020
Memory Module: DIMM3, 8 GB, DDR3 ECC, 1867 MHz, 0x80CE, 0x4D33393342314737305148302D434D412020
Memory Module: DIMM4, 8 GB, DDR3 ECC, 1867 MHz, 0x80CE, 0x4D33393342314737305148302D434D412020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x135), Broadcom BCM43xx 1.0 (6.30.223.154.65)
Bluetooth: Version 4.2.6f1 14216, 3 services, 23 devices, 1 incoming serial ports
Network Service: Ethernet 2, Ethernet, en1
PCI Card: AMD FirePro D700, Display Controller, Slot-2
PCI Card: AMD FirePro D700, Display Controller, Slot-1
PCI Card: pci105a,8760, RAID Controller, Thunderbolt@158,0,0
PCI Card: Apple 57761-B0, Ethernet Controller, Thunderbolt@77,0,0
PCI Card: pci11c1,5901, IEEE 1394 Open HCI, Thunderbolt@76,0,0
PCI Card: pci12d8,400e, USB Open Host Controller, Thunderbolt@82,0,0
PCI Card: pci12d8,400e, USB Open Host Controller, Thunderbolt@82,0,1
PCI Card: pci12d8,400f, USB Enhanced Host Controller, Thunderbolt@82,0,2
Serial ATA Device: APPLE SSD SM0512F, 500.28 GB
USB Device: Hub
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Hub
USB Device: Hub
USB Device: Apple Cinema HD Display
USB Device: Hub
USB Device: Keyboard Hub
USB Device: Apple Keyboard
USB Device: Display Audio
USB Device: Apple Thunderbolt Display
USB Device: FaceTime HD Camera (Display)
Thunderbolt Bus: Mac Pro, Apple Inc., 19.2
Thunderbolt Device: Thunderbolt Display, Apple Inc., 3, 26.2
Thunderbolt Bus: Mac Pro, Apple Inc., 19.2
Thunderbolt Device: Pegasus2-R, Promise Technology, Inc., 3, 19.2
Thunderbolt Bus: Mac Pro, Apple Inc., 19.2

FCPX worked slowly on new os x 10.9.4, also i took my mac to warranty service and they changed both GPUs, but problem persisted!

I have the same problem sometimes on my Mac Pro with FCPX. It actually happened 3 times the first day that I got the computer, but now just happens occasionally. I'll be interested to see if you figure out a solution!

ohh God!! it's look like my problem but my problem didn't Freezes like this. The display shut off first and Mac Pro automatic restart.
But It didn't happen often. haha... When I hard working about 3-4 hours non-stop and use open lot App

Yep, those are hardware problems. Get it in to your local Apple store for repair.