After taking a good look at the PCB of a GeForce GTX 680 Engineering Sample, like this one:

VERY LARGE SCAN!
 
I found out that J4 could of been the spot where leds could be attached to illuminate the GEFORCE GTX Logo's on their sides like the 690's have these days.
 
Now I ask: Did any GTX 680 Engineering Samples have these leds attached? So their GEFORCE GTX Logo's would light up the same way as the GTX 690 ones do?
 
I seek information since I once did research of the GTX 480's and 580's in the past, I just interest these things and yeah obtaining such an Engineering Sample would always be awesome of course
 
Here my topic about them GeForce Led Logo's on the 480 & 580 cards:
http://forums.evga.com/fb.ashx?m=924985
 
Which resulted why the GTX 590's has the GTX 480 GeForce logo's over the GTX 580 ones :)
 
 

That is the same connection as 690 for LED function, it was not populated though.

 

EVGA_JacobF

That is the same connection as 690 for LED function, it was not populated though.

Ahhh many thanks Jacob!  Was it ever populated with some Engineering Samples? I want to know this because I am trying to help a friend that collects such cards :)
 
He just obtained this GTX 480 Engineering Sample with GeForce Led Logo:
http://extreme.pcgameshar...0-a2-es-0110-5595.html

 
It has a GF100-375-A2 GPGPU :) But it's the one with 480 Fermi CUDA Cores, shamefully not the one with 512 Fermi CUDA Cores the one I seek hehe    

ssj92

Now if we can solder on a connector and take a 690 LED we can have the same effect on 680s. 

Well in theory this is possible, yes sir