I need someone to read a problem report... Please Mac Pro

I have an issue , my Macpro would not boot up this morning. it would frees at the boot apple logo and reboot. i took everything out of the computer and may have narrowed it down. I have a problem report here if someone can read it for me? I had an nvidia 8800gt and an original ati card. i took the nvidia out and it did boot. but seemed to look different as it booted, maybe its just the way ATI does it vers nvidia. this report doesnt show the nvidia isuess because its from after i took it outInterval Since Last Panic Report: 570604 sec

Panics Since Last Report: 2
Anonymous UUID: ACD98195-7C09-4D8E-AFF6-9A25F3F78D63

Sat Aug 18 11:57:18 2012
Machine-check capabilities 0x0000000000000806:
family: 6 model: 23 stepping: 6 microcode: 1547
Intel(R) Xeon(R) CPU E5462 @ 2.80GHz
6 error-reporting banks
threshold-based error status present
Processor 0: no machine-check status reported
Processor 1: no machine-check status reported
Panic(CPU 4): Unresponsive processor (this CPU did not acknowledge interrupts) TLB state:0x0
RAX: 0x0000000000000001, RBX: 0xffffff81354080b0, RCX: 0xffffff802c5eb000, RDX: 0x0000000000000000
RSP: 0xffffff8135407e90, RBP: 0xffffff8135407f30, RSI: 0x00000000299e72b6, RDI: 0xffffff80142a12a8
R8: 0x0000000000000006, R9: 0x0000000000000000, R10: 0x0800000000000000, R11: 0x0400000000000000
R12: 0xffffff81354080b0, R13: 0xffffff8150eb4000, R14: 0x000000000000ffff, R15: 0x0000000000000001
RFL: 0x0000000000000046, RIP: 0xffffff8013cb2ba9, CS: 0x0000000000000008, SS: 0p0000000000000010
Backtrace (CPU 4), Frame : Return Address
6 caPleani 0PU 5): Unresponsivffrofesf0 dtdbf "81C5B 0dndfa5ti:dat on fnPIl fgiie013cb 33"
C0ptxs ) fafltdf at81es0oxd0RA:i:ntx r0fffffunresp0nfxffveffPUf8f 14t2ap:001Rx306 0x NMdPI 0ckx0 ofif00x08 n3w0:c0e"DX@/0So6r6f
che1xu00xxfff05f7ffP/5s0fffk4ffx1864_04/0 aB.P:x33fffffff8f13cf8fc8
429f30, RSI: 0x0xff00081304000a0 12b, RDI: 0x 00Model: MacPro3,1, BootROM MP31.006C.B05, 8 processors, Quad-Core Intel Xeon, 2.8 GHz, 10 GB, SMC 1.25f4
Graphics: ATI Radeon HD 2600 XT, ATI Radeon HD 2600, PCIe, 256 MB
Memory Module: DIMM Riser B/DIMM 1, 4 GB, DDR2 FB-DIMM, 800 MHz, 0x80CE, 0x000000463732353142363245353830304600
Memory Module: DIMM Riser B/DIMM 2, 4 GB, DDR2 FB-DIMM, 800 MHz, 0x80CE, 0x000000463732353142363245353830304600
Memory Module: DIMM Riser A/DIMM 1, 1 GB, DDR2 FB-DIMM, 800 MHz, 0x802C, 0x3138484631323837324A4438304544364434
Memory Module: DIMM Riser A/DIMM 2, 1 GB, DDR2 FB-DIMM, 800 MHz, 0x802C, 0x3138484631323837324A4438304544364434
Bluetooth: Version 4.0.9f8 10405, 2 service, 18 devices, 1 incoming serial ports
Network Service: Ethernet 1, Ethernet, en0
PCI Card: ATI Radeon HD 2600, sppci_displaycontroller, Slot-2
Serial ATA Device: WDC WD2002FAEX-007BA0, 2 TB
Serial ATA Device: WDC WD2002FAEX-007BA0, 2 TB
Serial ATA Device: ST31500341AS, 1.5 TB
Serial ATA Device: ST3000DM001-9YN166, 3 TB
Parallel ATA Device: OPTIARC DVD RW AD-7170A
USB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0xfd500000 / 3
USB Device: Apple Optical USB Mouse, apple_vendor_id, 0x0304, 0xfd530000 / 5
USB Device: Apple Keyboard, apple_vendor_id, 0x0220, 0xfd520000 / 4
USB Device: ImageMate 14 in 1 Reader/Writer, 0x0781 (SanDisk Corporation), 0xb4b5, 0xfd300000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8206, 0x5d200000 / 2
FireWire Device: built-in_hub, 800mbit_speed
FireWire Device: FreeAgent Xtreme, Seagate, 400mbit_speed
FireWire Device: FreeAgent Xtreme, Seagate, 400mbit_speed

There's no error messages there. Just that you have had 2 kernel panics since the last hardware report was compiled.