MacBook Pro Display Rectangles on the screen

My Macbook Pro Displays Diagonal Rectangles across the screen. These rectangles also appear when I attach it to an external monitor. Also, when this problem started it will only boot in safe mode.
Here is a picture of the problem:
Any help would be appreciated.

Dou you have an ATO Graphics card? I used to have a similar problem on a Windows machine with an ATI X850XT. I tried taking out and re-installing the card. This fixed the problem for a while. I came back, tried the same, problem solved.
Don't know what causes it, though... But I don't think it's software related. Could be I'm wrong, though...

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    IA32_MC1_STATUS(0x405): 0x0980000000000000 invalid
    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
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       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
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    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
       Processor context corrupt
       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
    IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
    Processor 2: machine-check status 0x0000000000000004:
    machine-check in progress
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    IA32_MC0_STATUS(0x401): 0x0000000000000000 invalid
    IA32_MC1_STATUS(0x405): 0x0980000000000000 invalid
    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
       Processor context corrupt
       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC3_MISC(0x40f): 0x000000000003ffff
    IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
    IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
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    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
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       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC3_MISC(0x40f): 0x000000000003ffff
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    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
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    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
       Processor context corrupt
       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC3_MISC(0x40f): 0x000000000003ffff
    IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
    IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
    Processor 5: machine-check status 0x0000000000000005:
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    MCA error-reporting registers:
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    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
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      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
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       MISC register valid
       Error enabled
       Uncorrected error
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    IA32_MC3_MISC(0x40f): 0x000000000003ffff
    IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
    IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
    Processor 6: machine-check status 0x0000000000000004:
    machine-check in progress
    MCA error-reporting registers:
    IA32_MC0_STATUS(0x401): 0x0000000000000000 invalid
    IA32_MC1_STATUS(0x405): 0x0980000000000000 invalid
    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
      MCA error code:            0x0400
      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
       Processor context corrupt
       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
    IA32_MC3_ADDR(0x40e): 0x00003f7f8ff81ab9
    IA32_MC3_MISC(0x40f): 0x000000000003ffff
    IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
    Package 0 logged:
    IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
    Processor 7: machine-check status 0x0000000000000005:
    restart IP valid
    machine-check in progress
    MCA error-reporting registers:
    IA32_MC0_STATUS(0x401): 0x0000000000000000 invalid
    IA32_MC1_STATUS(0x405): 0x0980000000000000 invalid
    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
      MCA error code:            0x0400
      Model specific error code: 0x0080
      Other information:         0x00000000
      Threshold-based status:    Undefined
      Status bits:
       Processor context corrupt
       ADDR register valid
       MISC register valid
       Error enabled
       Uncorrected error
    IA32_MC3_ADDR(0x40e): 0x00003f7f8ff81ab9
    IA32_MC3_MISC(0x40f): 0x000000000003ffff
    IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
    IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
    IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
    IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
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    panic(cpu 0 caller 0xffffff800e0b8ec9): "Machine Check at 0xffffff800e0ce40f, registers:\n" "CR0: 0x000000008001003b, CR2: 0x000000007a232000, CR3: 0x0000000029615020, CR4: 0x00000000000606e0\n" "RAX: 0x000000008001003b, RBX: 0xffffff802f3d5490, RCX: 0xffffff800e6c1580, RDX: 0xffffff800e6bfc28\n" "RSP: 0xffffff81df713df0, RBP: 0xffffff81df713ef0, RSI: 0x000000316f7d995f, RDI: 0xffffff800e601f20\n" "R8:  0x0000000000000031, R9:  0x00000000075b8fe2, R10: 0xffffff81ce82ddc0, R11: 0xffffff800e6bac01\n" "R12: 0xffffff81ce82dfe8, R13: 0x0000000000000000, R14: 0xffffff802e3d5310, R15: 0xffffff800e3bacf0\n" "RFL: 0x0000000000000082, RIP: 0xffffff800e0ce40f, CS:  0x0000000000000008, SS:  0x0000000000000010\n" "Error code: 0x0000000000000000\n"@/SourceCache/xnu/xnu-2050.24.15/osfmk/i386/trap_native.c: 280
    Backtrace (CPU 0), Frame : Return Address
    0xffffff800df0bd20 : 0xffffff800e01d626
    0xffffff800df0bd90
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    Graphics: AMD Radeon HD 6490M, AMD Radeon HD 6490M, PCIe, 256 MB
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    Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1333 MHz, 0x859B, 0x435438473353313333394D2E4D3136464444
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