Pardon me for being a n00b, I am not the best with enbs. Using newest enbseries and RealVision mod. The sun appears as a white ball with no rays emanating even though I have volumetric rays turned on. My brother seems to have all the same options checked but he gets some sweet looking rays and differentiation when the sun is shining through trees and such. Is it possible my 560ti card does not support this kind of thing? It seems like it should bu I'm out of ideas at this point.

might depend on the weather and time
type in following commands in the console:
set gamehour to 11
fw 81a

so you booth are on the same weather and time of day.

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Vividian - Weather - Lighting - CoT and Pure Weather Enhancement
Viradia ENB for Fallout
Vivid Clouds and Fogs

GTX670 @ Windows74bit - 8GB RAM

Well, my sky turned a nicer color and all the lighting seemed to improve. Still no rays though...

Enable floating point render target in skyrim.ini or skyrimpref.ini. I don't remember. Had same issue.