Help 680m m15x

hi can any one help me with this please i just bought a gtx 680m of ebay and installed it in my m15x but i get the following error only when it is installed and when i put my old gtx 260m back in all is fine i have done this about four times and its always the same could my 680m be defective

PXE-E61: MEDIA TEST FAILURE, CHECK CABLE
PXE-MOF;EXITING INTEL BOOT AGENT
OPERATING SYSTEM NOT FOUND
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More about help 680m m15x
  1. Hi I had the same problem and had the same error screen. Then what I did was flash the card with original dell 680m vBios. And now system works. I suspected that the card I got (and probably yours) has been previously overclocked. Hope this helps
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