phytoplankton :
So I decided to go for a GTX Titan sometime in the next months on my new 3-monitor build. Is there any discernible difference between the standard version of the GTX Titan? Right now eVGA and ASUS seem available here in Denmark.
Also: What does signature version mean? Is it just a version with merchandize?
Based on my knowledge of GPU's. They don't make a profound difference although there are variables of cards where you can see massive clock differences but all that was done by the secondary manufacturer was they've upped the clock speed so in other words, they've overclocked it. Sometimes a secondary manufacturer will add a better cooler than that of the main manufacturer.
I suggest you look at your options with regards to the versions of GTX Titan that you're not too sure about and post it here and ask for an opinion from on of the Tomsters over here. Can't really answer that question with so much possibility for answer.