Strangest Display Port behavior

aigram

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Jul 31, 2012
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I have a EVGA GTX 970 FTW+ and an Asus MX299Q monitor, both have Display Port capability. Here is what is going on:

Graphics card (any of the available display ports > Display Port cable > Asus monitor = no video output
Graphics card > DVI cable > Asus monitor = video output
Graphics card > Display Port cable > different monitor = video output
Entirely different machine with display port > Display Port cable > Asus monitor = video output

Basically what I have attempted to do is isolate the three primary pieces of hardware; the graphics card, the cable, and the monitor. Each have worked independently of each other with zero issues, but never all together. I am tempted at this point to RMA both my monitor and the card, as obviously one of them is to blame, or both for that matter. But before I do that, please help! I am banging my head here.
 

aigram

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Jul 31, 2012
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I have used two different display port cables between my graphics card and the Asus monitor.
 

aigram

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After a phone call to EVGA, they suggested that I roll-back to a specific driver, and tech support seemed confident that this is software and not hardware related. Also, an RMA on either the graphics card or the monitor is slightly dishonest, as they both 'work,' just not together, but I agree, it is definitely still an option on the table.
 

aigram

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Jul 31, 2012
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Further behavior:
With all three components in question connected, after POST the monitor comes out of standby and eventually throws up the error for no signal detected on display port. What this leads me to think is that the monitor is receiving a signal, but is failing to decode it for whatever reason (this is really the big question here, Nvidia or Asus folks!) and does not complete the handshake to initiate the link between monitor and graphics card.