That CPU will work fine on an M6700 -- less clear is whether it'll start up with a missing GPU.  It WILL run if the GPU dies - on the integrated graphics -- but it may in fact not pass POST without a recognized GPU aboard.  That side of things isn't clear (though your experience suggests the GPU must be there for the system to boot up -- assuming your system doesn't have a GPU.

These weren't shipped from the factory with integrated-only graphics.

Ok, thanks.

I figured out that I need a video card.

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Here is my current config on the M6700:

Intel cpu as above

16GB of supported memory

AMD ATI FIREPRO M5950 VIDEO CARD ( from a Dell M4600).

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Now, the screen still passed BIST.

The screen lights up, but is completely blank.

I do not want to spend hundreds of $$ on the video card something I will not need.

How can I make this work with this video card.

Is there a way to update the BIOS (say over network) without a video card installed or update the bios to recognize this video card?

Thanks.

This is solved by myself .

Had bad incompatible memory. The memory works on a Toshiba.

Once, I replaced the memory, it was all good. No need for any graphics cards either. It used the CPU graphics features.