Salve a tutti

ho un problema gravissimo da risolvere, ho letto qualcosa a riguardo ma non riesco a risolverlo, prima di andare al centro assistenza apple vorrei capire se posso risolverlo da casa
vi spiego:

possiedo l'ultima generazione di mac pro fisso intel xeon con scheda grafica nvidia NVIDIA GeForce 8800 GT SNOW LEOPARD 10.6.3

da qualche giorno mi si blocca ogni volta che lo avvio dopo 30/40 minuti all'incirca e sono costretto a riavviarlo

prima di bloccarsi ha come dei SINTOMI cioè lo schermo SALTA ogni volta che uso la dock in basso o che muovo il mouse sul browser safari o quando uso l'exposè e gli angoli attivi

ho notato anche che il mio mac non emette più il suono della ventola, forse è una paranoia ma magari la ventola della scheda grafica si è rotta e il surriscaldamento della stessa scheda mi causa questi problemi.....

se può servire vi dico anche che certe volte non mi riconosce 1gb di ram e dopo averla smontata e rimessa la riconosce di nuovo

qui sotto vi riporto il log crash


Sun Apr 11 12:41:18 2010
panic(cpu 4 caller 0x9cedc6): NVRM[0/2:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0x92000000 0x39cb6000 0x092100a2, D0, P1/2
Backtrace (CPU 4), Frame : Return Address (4 potential args on stack)
0x396ab6c8 : 0x21b449 (0x5ce420 0x396ab6fc 0x2238a5 0x0)
0x396ab718 : 0x9cedc6 (0xbd632c 0xc43d20 0xbe3b64 0x0)
0x396ab7b8 : 0x134b8dd (0x6102804 0x546a004 0x100 0x396ab7c8)
0x396ab7f8 : 0xad6630 (0x546a004 0x100 0x396ab828 0x9bfc76)
0x396ab828 : 0x1379463 (0x546a004 0x100 0x43cd0cee 0x396ab838)
0x396ab958 : 0xafc27f (0x546a004 0x6786804 0x0 0x0)
0x396ab998 : 0x9d7e70 (0x546a004 0x6786804 0x0 0x0)
0x396ab9d8 : 0x9d41b3 (0x0 0x9 0x0 0x0)
0x396abb38 : 0x9d6097 (0x0 0x600d600d 0x702a 0x396abb68)
0x396abc08 : 0x96e5ce (0xc1d00021 0xaa910001 0x20802040 0x396abc50)
0x396abc68 : 0xfa6bd3 (0x6132800 0x396abc9c 0x0 0x7)
0x396abca8 : 0xfa53bf (0x67af500 0x6119520 0x61a9c80 0xcf564c)
0x396abcc8 : 0xfa559a (0x67af500 0x61a9f60 0x396abcf8 0xcf4eff)
0x396abcf8 : 0xcf4fe8 (0x67af500 0x8ae7500 0x61ae720 0x4faa50)
0x396abd28 : 0xcf4e45 (0x61a6bc0 0x85f800 0x396abd88 0x296ca6)
0x396abd48 : 0xcff386 (0x61a6bc0 0x5e6dc00 0x396abd78 0xd0267c)
0x396abd78 : 0xd0000b (0x5e6dc00 0x5e6dcd4 0x396abdb8 0x296ce5)
0x396abdc8 : 0xd011be (0x5e6dc00 0x732d4710 0x396abe28 0x2315d5)
0x396abde8 : 0xcff556 (0x5e6dc00 0x1 0x7664e8 0x0)
0x396abe08 : 0xcf1b27 (0x5e6dc00 0xcf7d0c 0x396abe28 0x5ce2c00)
0x396abe48 : 0xcf34bc (0x5ce2c00 0x7294c04e 0x32e 0x2a1596)
0x396abe88 : 0xcfb2cf (0x5ce2c00 0x396abf5c 0x64 0x396abec0)
0x396abee8 : 0xcf31d8 (0x5ce2c00 0x396abf5c 0x9015e70b 0x32e)
0x396abf38 : 0xcf2200 (0x5ce2c00 0x396abf5c 0x888a3d4 0x863ea0)
0x396abf78 : 0x22fb78 (0x5ce2c00 0x0 0x0 0x0)
0x396abfc8 : 0x29e6cc (0x863ea0 0x0 0x10 0x0)
Kernel Extensions in backtrace (with dependencies):
com.apple.driver.AppleHWSensor(1.9.3d0)@0xfa4000->0xfa8fff
com.apple.nvidia.nv50hal(6.1.0)@0x124e000->0x166bfff
dependency: com.apple.NVDAResman(6.1.0)@0x96c000
com.apple.NVDAResman(6.1.0)@0x96c000->0xc44fff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x92d000
dependency: com.apple.iokit.IONDRVSupport(2.1)@0x95f000
dependency: com.apple.iokit.IOGraphicsFamily(2.1)@0x93e000
com.apple.driver.ACPI_SMC_PlatformPlugin(4.1.1d0)@0xcf8000->0xd07fff
dependency: com.apple.iokit.IOACPIFamily(1.3.0)@0x919000
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x92d000
dependency: com.apple.driver.IOPlatformPluginFamily(4.1.1d0)@0xcee000
dependency: com.apple.driver.AppleSMC(3.0.1d2)@0x91d000
com.apple.driver.IOPlatformPluginFamily(4.1.1d0)@0xcee000->0xcf7fff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
10D573

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: MacPro3,1 (Mac-F42C88C8)

System uptime in nanoseconds: 3498025875515
unloaded kexts:
com.apple.driver.AppleFileSystemDriver 2.0 (addr 0xe33000, size 0x12288) - last unloaded 140480447680
loaded kexts:
com.apple.driver.AppleHWSensor 1.9.3d0 - last loaded 23367987772
com.apple.filesystems.autofs 2.1.0
com.apple.driver.AppleUpstreamUserClient 3.3.2
com.apple.driver.AppleHDA 1.8.4fc3
com.apple.driver.AudioAUUC 1.4
com.apple.GeForce 6.1.0
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AudioIPCDriver 1.1.2
com.apple.driver.AppleMCEDriver 1.1.9
com.apple.driver.AppleIntelPenrynProfile 17
com.apple.driver.ACPI_SMC_PlatformPlugin 4.1.1d0
com.apple.driver.AppleLPC 1.4.11
com.apple.iokit.SCSITaskUserClient 2.6.2
com.apple.BootCache 31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.iokit.IOAHCIBlockStorage 1.6.1
com.apple.driver.AppleIntel8254XEthernet 2.1.1b7
com.apple.driver.AppleFWOHCI 4.5.7
com.apple.driver.AppleUSBHub 3.9.6
com.apple.driver.AppleAHCIPort 2.1.1
com.apple.driver.AppleIntelPIIXATA 2.5.1
com.apple.driver.AppleEFINVRAM 1.3.0
com.apple.driver.AppleUSBEHCI 3.9.6
com.apple.driver.AppleUSBUHCI 3.9.6
com.apple.driver.AppleACPIButtons 1.3.2
com.apple.driver.AppleRTC 1.3.1
com.apple.driver.AppleHPET 1.5
com.apple.driver.AppleSMBIOS 1.5
com.apple.driver.AppleACPIEC 1.3.2
com.apple.driver.AppleAPIC 1.4
com.apple.driver.AppleIntelCPUPowerManagementClient 104.3.0
com.apple.security.sandbox 0
com.apple.security.quarantine 0
com.apple.nke.applicationfirewall 2.1.11
com.apple.driver.AppleIntelCPUPowerManagement 104.3.0
com.apple.driver.AppleProfileReadCounterAction 17
com.apple.driver.DspFuncLib 1.8.4fc3
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.nvidia.nv50hal 6.1.0
com.apple.NVDAResman 6.1.0
com.apple.iokit.IONDRVSupport 2.1
com.apple.iokit.IOFireWireIP 2.0.3
com.apple.iokit.IOSurface 74.0
com.apple.iokit.IOBluetoothSerialManager 2.3.1f4
com.apple.iokit.IOSerialFamily 10.0.3
com.apple.iokit.IOAudioFamily 1.7.6fc2
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleHDAController 1.8.4fc3
com.apple.iokit.IOGraphicsFamily 2.1
com.apple.iokit.IOHDAFamily 1.8.4fc3
com.apple.iokit.AppleProfileFamily 41
com.apple.driver.AppleSMC 3.0.1d2
com.apple.driver.IOPlatformPluginFamily 4.1.1d0
com.apple.driver.CSRUSBBluetoothHCIController 2.3.1f4
com.apple.driver.AppleUSBBluetoothHCIController 2.3.1f4
com.apple.iokit.IOBluetoothFamily 2.3.1f4
com.apple.driver.AppleUSBHIDMouse 1.4.0d7
com.apple.driver.AppleHIDMouse 1.4.0d7
com.apple.driver.AppleUSBHIDKeyboard 1.2.0a3
com.apple.driver.AppleHIDKeyboard 1.2.0a3
com.apple.iokit.IOUSBHIDDriver 3.9.6
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.IOATAPIProtocolTransport 2.5.1
com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.2
com.apple.iokit.IONetworkingFamily 1.9
com.apple.iokit.IOFireWireFamily 4.2.6
com.apple.iokit.IOUSBUserClient 3.9.6
com.apple.iokit.IOAHCIFamily 2.0.3
com.apple.iokit.IOATAFamily 2.5.1
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.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 6
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


aiutami obi one sei la mia unica speranza!!!!!