You know matose, allways unlocking something, allways trying to open the doors that were closed by manufacturers.This time the subject is SLI on AMD 890FX boards, and we're talking about SLI, with 60-70% scaling numbers, not Lucid Hydra mixed multi-card. In this case, he used Asus Crosshair IV Extreme, and the PCI-E slots used were nr 1 and nr 3, that are connected directly to the chipset (in order to bypass the Hydra chip controlling the slots nr 2, 4 and 5.

 

Guide for activating SLI on AMD 890FX platforms - LAB501 - Google Translate

 

Isn't Lucid multi-GPU performance > SLI multi-gpu performance?

no

SLI/CF gives better results;

biggest advantage of Lucid is the mixed GPU mode

If I can find identical ATI cards, I'll give this a spin. As far as I know, ASUS claimed better results with Hydra multi-GPU than a native SLI/CF solution.

http://www.anandtech.com/show/2910/4

and more

Yes, it used to be worse.

 

Like I said ... ASUS claimed that Lucid was better than native SLI/CF on their AMD board.