My Mac Pro display is experiencing weird pixelation problems, does anyone know what causes this and how i can fix it?

Please take a look at these screenshots and help me!
http://imgur.com/a/P19lF
these are the specs of my computer
  Model Name:          Mac Pro
  Processor Name:          Quad-Core Intel Xeon
  Processor Speed:          2.26 GHz
  Number Of Processors:          2
  Total Number Of Cores:          8
  L2 Cache (per core):          256 KB
  L3 Cache (per processor):          8 MB
  Memory:          16 GB
  Processor Interconnect Speed:          5.86 GT/s
  Boot ROM Version:          MP41.0081.B07
  SMC Version (system):          1.39f5
  SMC Version (processor tray):          1.39f5
  Chipset Model:          NVIDIA GeForce GT 120
  Type:          GPU
  Bus:          PCIe
  Slot:          Slot-1
  PCIe Lane Width:          x16
  VRAM (Total):          512 MB
  Vendor:          NVIDIA (0x10de)
  ROM Revision:          3386
  Displays:
Display Connector:
  Status:          No Display Connected
display 1
LED Cinema Display:
  Resolution:          1920 x 1200
  Pixel Depth:          32-Bit Color (ARGB8888)
  Main Display:          Yes
  Mirror:          Off
  Online:          Yes
  Rotation:          Supported
  Connection Type:          DisplayPort
  Chipset Model:          NVIDIA GeForce GT 120
  Type:          GPU
  Bus:          PCIe
  Slot:          Slot-2
  PCIe Lane Width:          x16
  VRAM (Total):          512 MB
  Vendor:          NVIDIA (0x10de)
  ROM Revision:          3386
display 2
Display Connector:
  Status:          No Display Connected
LED Cinema Display:
  Resolution:          1920 x 1200
  Pixel Depth:          32-Bit Color (ARGB8888)
  Mirror:          Off
  Online:          Yes
  Rotation:          Supported
  Connection Type:          DisplayPort
i'm not sure what else i need to provide.
Please help

Make a "Genius" appointment at an Apple Store to have the machine tested. Back up all data before you go.

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