As suggested yesterday, I have switched to a 5 wire SATA connector with a 3.3V orange. I have manually tested the SATA connector with a digital multimeter to ensure that all the terminals have the rights voltages. All of them have the corresponding voltages i.e., yellow 12V, red 5V, and orange 3.3V.  When I switched on my computer, the LED on the EVGA Nu Audio Card lighted up momentarily but it did not stay lighted up as it should be. There was also a clicking sound when the LED turned itself off. As before, the card is not listed on the Device Manager. When I reinstalled the driver I got the same messages as before, i.e., "EVGA NU Audio driver failed to install correctly. Please reboot your computer and run the installer again". I have repeated this process several times with no success. Not sure what is going on and why is the software not being installed. Never had this same experience with any installs. This is just not right. 

Based on the symptoms and the troubleshooting done so far, this definitely seems like a defective card. The RMA that you have placed on the card should take care of this problem.
Looking forward to getting this resolved for you!

EVGATech_AnthonyS
Based on the symptoms and the troubleshooting done so far, this definitely seems like a defective card. The RMA that you have placed on the card should take care of this problem.
Looking forward to getting this resolved for you!

hello i have same problem with my cardwhen i plug sata power socket. not have rgb light. when i turn on pc i heard relay voice. i tried many times install drivers but windows 10 do not recognizing evga nu.  i bought card by ebay used but seller says working. i tried still card looks died. no light.  he tried wrong connection before than me . i see sata sonnector damaged. i think he tried plug sata power wrong. and card died now. am i right? . how i can repair this car if he plug sata power wrong?

EVGATech_LeeM

mnongrum
Yes, I have two SATA power cables coming out from my 435W PSU (Power Supply Unit).
I have tried both cables but in both cases, I don't see the LED lights on.
I tested the SATA powers cables on an additional hard-drive to make sure there are both working, and both of them worked perfectly. So there is nothing wrong with the SATA power cables. 
Either the card is dead or there is something else that is horribly wrong with the Nu Audio Card.
I bought this card directly from EVGA website, is there a way they will send me a replacement?
Appreciate your advice.

This sounds like the card has failed.  If the LED is off, and you previously had it on, that suggests the card has failed.  If you manually turned off the LED in the software, and the LED stays off, then it would be normal.
 
I see that you've reached out to us to get a replacement, so I'll make sure that someone on our team will follow up with you.
 

can help me. rgb lights not working card looks died. i see issue on device management. looks unknown device. nu driver installed

scar1ove
 
can help me. rgb lights not working card looks died. i see issue on device management. looks unknown device. nu driver installed

You'll want to submit an issue on your card here. The card will need to be registered first, if it isn't already.

BizSAR

scar1ove
 
can help me. rgb lights not working card looks died. i see issue on device management. looks unknown device. nu driver installed

You'll want to submit an issue on your card . The card will need to be registered first, if it isn't already.

i can register product. but i cannot send sound card to another country. because i will give tax again same i order brand new item. because of our bull**** country management. only i asking this: if sata power plugged and turn on the pc. rgb lights should run on audio card or not?  my card not have light only i heard relay voice tik tik.. you can see my card. how he try sata power wrong you can see on photo. how he have brain and make this. after card died i think. but he do not accept. he said me card is working on my computer :)

scar1ove
i can register product. but i cannot send sound card to another country. because i will give tax again same i order brand new item. because of our bull**** country management. only i asking this: if sata power plugged and turn on the pc. rgb lights should run on audio card or not?  my card not have light only i heard relay voice tik tik.. you can see my card. how he try sata power wrong you can see on photo. how he have brain and make this. after card died i think. but he do not accept. he said me card is working on my computer :)

I don't know but perhaps someone else does? If you have the card registered, you can ask the question from EVGA at the link I provided. You won't need to send the card in do to that.