What does it mean when a display is not "ddc functional"???

[Bitla]

"Your display, for the moment will not be ddc functional with ColorEyes."
This is part of the answer I received when informing if ColorEyes would run under Vista (yes).

As I received no further answer to my question, can someone on this forum please explain what it means? I have a NEC 2690 and a 8600GT card in case that is of importance. What is the consequence of not being ddc functional? Does the calibtration not work properly, or is it more cumbersome, or what?

Thank you for your answers!

 

[Tamlin_WSGF]

Via DDC/CI, the software is capable of communicating and calibrating directly on the screen itself. For the NEC 2690 with use of Spectraview 2, or Spectraview profiler, you can even calibrate the 12-bits monitor LUT and gamma for optimal result via DDC/CI. This function can be turned on and off in the advanced menu.

Without DDC, you'll only be able to calibrate the GFX LUT and profile the screen. This means that RGB adjustments for white point, brightness and contrast etc. have to be done manually.