I had the same problem
Pc spec
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System Information
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Time of this report: 1/18/2012, 22:41:55
       Machine name: SAJINPRINCE-PC
   Operating System: Windows 7 Enterprise 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110622-1506)
           Language: English (Regional Setting: English)
System Manufacturer: Gigabyte Technology Co., Ltd.
       System Model: X58A-UD3R
               BIOS: Award Modular BIOS v6.00PG
          Processor: Intel(R) Core(TM) i7 CPU         950  @ 3.07GHz (8 CPUs), ~3.1GHz
             Memory: 6144MB RAM
Available OS Memory: 6142MB RAM
          Page File: 3339MB used, 8943MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.01.7601.17514 32bit Unicode
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DxDiag Notes
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      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
          Input Tab: No problems found.
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DirectX Debug Levels
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Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)
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Display Devices
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          Card name: NVIDIA GeForce GTX 570
       Manufacturer: NVIDIA
          Chip type: GeForce GTX 570
           DAC type: Integrated RAMDAC
         Device Key: Enum\PCI\VEN_10DE&DEV_1081&SUBSYS_087E10DE&REV_A1
     Display Memory: 4063 MB
   Dedicated Memory: 1248 MB
      Shared Memory: 2815 MB
       Current Mode: 1920 x 1080 (32 bit) (60Hz)
       Monitor Name: Generic PnP Monitor
      Monitor Model: SyncMaster
         Monitor Id: SAM0656
        Native Mode: 1920 x 1080(p) (60.000Hz)
        Output Type: DVI
        Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 8.17.0012.8562 (English)
     Driver Version: 8.17.12.8562
        DDI Version: 11
       Driver Model: WDDM 1.1
  Driver Attributes: Final Retail
The problem is this board does not like memory that runs at 1600 mhz.
This seems to be related to a discrepancy between memory and Processor. This specific Processor requires 1066Mhz - 1.5 volts memory. We can also use 1333Mhz - 1.5 volts but the memory controller will downgrade the speed to 1066. Working over these specifications will cause some issues on the system as random reboots, the system freezes and many other problems since we are forcing the Processor to downgrade the speed and probably the voltage since most of the 1600Mhz RAM works at 1.6 or 1.65 volts. This may also damage the memory controller on the Processor voiding its warranty.
Steps i did to resolve.
I got rev 2.0 from gigabyte (Swapped out the board).
The problem still persisted.
I then enabled XMP memory profile setting in the bios.
This resolved the random stuttering problem.
I saw the voltage was set to high though.
So i set all the memory timings manually
8,8,2 (If i remember correctly) for my Corsair Dominator memory and I raised the voltage to the maximum intel recommended to not damage the processor.
Your Ram manufacturer should list the timings on their website for your ram and don't forget to raise the voltage and set the multiplier so the memory runs at 1600 mhz.
You can just use the XMP profile setting and it will set everything for you but it is very aggressive with voltage etc.. and you might damage something lonmg term but it still resolves the problem.