Sorry not to be more clear about the Graphics card (if that is the issue.) I've copied the Kernel Panic report below. Happy for any insights it might lead to.
Anonymous UUID: C47E2C90-FA2A-4B30-00D0-83E865038BC5
Mon Dec 8 18:57:28 2014
panic(cpu 14 caller 0x2a8ac2): Kernel trap at 0xa690f57c, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x00000018, CR3: 0x00100000, CR4: 0x00000660
EAX: 0x00000000, EBX: 0x00000000, ECX: 0x00000000, EDX: 0x29663004
CR2: 0x00000018, EBP: 0xa5d53c58, ESI: 0x2a521000, EDI: 0x2a521000
EFL: 0x00010282, EIP: 0xa690f57c, CS: 0x00000008, DS: 0x00290010
Error code: 0x00000000
Backtrace (CPU 14), Frame : Return Address (4 potential args on stack)
0xa5d53a68 : 0x21b449 (0x5ce420 0xa5d53a9c 0x2238a5 0x0)
0xa5d53ab8 : 0x2a8ac2 (0x590478 0xa690f57c 0xe 0x590642)
0xa5d53b98 : 0x29e9a8 (0xa5d53bb0 0x2a50bd00 0xa5d53c58 0xa690f57c)
0xa5d53ba8 : 0xa690f57c (0xe 0x48 0x10 0xa5d50010)
0xa5d53c58 : 0xa68a9599 (0x0 0x2a50bd00 0xa5d53c88 0x52f5e6)
0xa5d53c88 : 0xa5f50269 (0x2a521000 0xa5f5745c 0x2a7b2b20 0x29247a00)
0xa5d53d08 : 0xa5f4ebb2 (0x2a521000 0xa5d53dcc 0x29819000 0x4bad654f)
0xa5d53d38 : 0x532987 (0x2a521000 0x29819000 0x29819000 0x0)
0xa5d53d88 : 0x563364 (0x2a521000 0x29819000 0x29819000 0x0)
0xa5d53de8 : 0x285002 (0x2a521000 0x29819000 0x0 0x0)
0xa5d53e58 : 0x21d7eb (0x2a694b68 0x2a694384 0x2a694b6c 0x2a694ba4)
0xa5d53e98 : 0x210977 (0x2a694b00 0xa5d53edc 0x29811ae4 0xa5d53ed0)
0xa5d53ef8 : 0x216bda (0x2a694b00 0x0 0x0 0x0)
0xa5d53f78 : 0x293dd1 (0x29a0d888 0x0 0x0 0x0)
0xa5d53fc8 : 0x29f48d (0x29a0d884 0x0 0x29e6db 0x2937b9a4)
Kernel Extensions in backtrace (with dependencies):
com.apple.NVDAResman(6.1.0)@0xa68a5000->0xa6b7dfff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x97743000
dependency: com.apple.iokit.IONDRVSupport(2.1)@0xa5ef8000
dependency: com.apple.iokit.IOGraphicsFamily(2.1)@0xa5f3e000
com.apple.iokit.IOGraphicsFamily(2.1)@0xa5f3e000->0xa5f5efff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x97743000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
10D575
Kernel version:
Darwin Kernel Version 10.3.0: Fri Feb 26 11:58:09 PST 2010; root:xnu-1504.3.12~1/RELEASE_I386
System model name: MacPro4,1 (Mac-F221BEC8)
System uptime in nanoseconds: 108405702297
unloaded kexts:
(none)
loaded kexts:
com.apple.driver.AppleTyMCEDriver 1.0.1d8
com.apple.driver.AGPM 100.10.21
com.apple.driver.InternalModemSupport 2.6.2
com.apple.driver.AudioAUUC 1.4
com.apple.driver.AppleIntelYonahProfile 14
com.apple.driver.AppleMikeyHIDDriver 1.2.0
com.apple.driver.AppleIntelPenrynProfile 17
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleMikeyDriver 1.8.4fc3
com.apple.driver.AppleIntelNehalemProfile 11
com.apple.driver.AppleHDA 1.8.4fc3
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AppleUpstreamUserClient 3.3.2
com.apple.driver.AppleIntelMeromProfile 19
com.apple.GeForce 6.1.0
com.apple.driver.ACPI_SMC_PlatformPlugin 4.1.1d0
com.apple.driver.AppleLPC 1.4.11
com.apple.driver.DiskImages.SparseDiskImage 283
com.apple.driver.DiskImages.ReadWriteDiskImage 283
com.apple.driver.DiskImages.UDIFDiskImage 283
com.apple.driver.DiskImages.RAMBackingStore 283
com.apple.driver.DiskImages.HTTPBackingStore 283
com.apple.driver.DiskImages.FileBackingStore 283
com.apple.iokit.SCSITaskUserClient 2.6.2
com.apple.driver.PioneerSuperDrive 2.5.3
com.apple.BootCache 31
com.apple.driver.AppleFWOHCI 4.5.7
com.apple.driver.AppleUSBHub 3.9.6
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.iokit.IOAHCIBlockStorage 1.6.1
com.apple.driver.Intel82574L 1.0.4b1
com.apple.driver.AirPortBrcm43xx 422.91.27
com.apple.driver.AppleIntel8254XEthernet 2.1.1b7
com.apple.driver.AppleUSBEHCI 3.9.6
com.apple.driver.AppleAHCIPort 2.1.1
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleUSBUHCI 3.9.6
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleACPIButtons 1.3.2
com.apple.driver.AppleSMBIOS 1.5
com.apple.driver.AppleACPIEC 1.3.2
com.apple.driver.AppleAPIC 1.4
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagementClient 104.3.0
com.apple.driver.AppleIntelCPUPowerManagement 104.3.0
com.apple.driver.AppleHDAPlatformDriver 1.8.4fc3 - last loaded 105299447716
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.AppleProfileTimestampAction 10
com.apple.driver.AppleProfileThreadInfoAction 14
com.apple.driver.AppleProfileRegisterStateAction 10
com.apple.driver.AppleProfileKEventAction 10
com.apple.driver.AppleProfileCallstackAction 20
com.apple.iokit.IOSurface 74.0
com.apple.iokit.IOBluetoothSerialManager 2.3.1f4
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.driver.AppleHDAHardwareConfigDriver 1.8.4fc3
com.apple.driver.DspFuncLib 1.8.4fc3
com.apple.iokit.IOAudioFamily 1.7.6fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleSMBusController 1.0.8d0
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.AppleHDAController 1.8.4fc3
com.apple.iokit.IOHDAFamily 1.8.4fc3
com.apple.NVDAResman 6.1.0
com.apple.iokit.IONDRVSupport 2.1
com.apple.iokit.IOGraphicsFamily 2.1
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 4.1.1d0
com.apple.driver.AppleSMBusPCI 1.0.8d0
com.apple.driver.DiskImages.KernelBacked 283
com.apple.driver.AppleUSBHIDKeyboard 1.2.0a3
com.apple.iokit.IOUSBHIDDriver 3.9.6
com.apple.driver.AppleHIDKeyboard 1.2.0a3
com.apple.driver.BroadcomUSBBluetoothHCIController 2.3.1f4
com.apple.driver.AppleUSBBluetoothHCIController 2.3.1f4
com.apple.iokit.IOBluetoothFamily 2.3.1f4
com.apple.driver.AppleUSBMergeNub 3.9.6
com.apple.driver.AppleUSBComposite 3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.2
com.apple.iokit.IOBDStorageFamily 1.6
com.apple.iokit.IODVDStorageFamily 1.6
com.apple.iokit.IOCDStorageFamily 1.6
com.apple.driver.XsanFilter 402.1
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.driver.AppleFileSystemDriver 2.0
com.apple.iokit.IOUSBUserClient 3.9.6
com.apple.iokit.IOAHCISerialATAPI 1.2.3
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.2
com.apple.iokit.IO80211Family 310.6
com.apple.iokit.IONetworkingFamily 1.9
com.apple.iokit.IOAHCIFamily 2.0.3
com.apple.iokit.IOUSBFamily 3.9.6
com.apple.driver.AppleEFIRuntime 1.3.0
com.apple.iokit.IOHIDFamily 1.6.2
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.TMSafetyNet 6
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 283
com.apple.iokit.IOStorageFamily 1.6
com.apple.driver.AppleACPIPlatform 1.3.2
com.apple.iokit.IOPCIFamily 2.6
com.apple.iokit.IOACPIFamily 1.3.0
System Profile:
Model: MacPro4,1, BootROM MP41.0081.B07, 8 processors, Quad-Core Intel Xeon, 2.26 GHz, 48 GB, SMC 1.39f5
Graphics: NVIDIA GeForce GTX 680, NVIDIA GeForce GTX 680, PCIe, 2048 MB
Memory Module: DIMM 1, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
Memory Module: DIMM 2, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
Memory Module: DIMM 3, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
Memory Module: DIMM 5, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
Memory Module: DIMM 6, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
Memory Module: DIMM 7, 8 GB, DDR3 ECC, 1066 MHz, 0x85F7, 0x463732314755363546393333334700520000
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 4.2.7f3 14616, 3 services, 15 devices, 1 incoming serial ports
Network Service: Ethernet 1, Ethernet, en0
Network Service: Ethernet 2, Ethernet, en1
Network Service: Wi-Fi, AirPort, en2
PCI Card: NVIDIA GeForce GTX 680, Display Controller, Slot-1
PCI Card: NVIDIA GeForce GTX 680, NVDA,Parent, Slot-1
PCI Card: DeckLink Studio 2, Video, Slot-2
PCI Card: AJA KonaLHi, Video, Slot-3
PCI Card: pci1095,3124, RAID Controller, Slot-4@5,0,0
Serial ATA Device: PIONEER BD-RW BDR-205
Serial ATA Device: HL-DT-ST DVD-RW GH41N
Serial ATA Device: Hitachi HDS722020ALA330, 2 TB
Serial ATA Device: WDC WD6400AAKS-41H2B0, 640.14 GB
Serial ATA Device: Hitachi HDS722020ALA330, 2 TB
Serial ATA Device: OWC Mercury EXTREME Pro 6G SSD, 480.1 GB
USB Device: Keyboard Hub
USB Device: Kensington USB Mouse
USB Device: Apple Keyboard
USB Device: BRCM2046 Hub
USB Device: Bluetooth USB Host Controller
FireWire Device: built-in_hub, Up to 800 Mb/sec
Thunderbolt Bus: