Here is what I got that the difference is:
“We are going to release A8N-SLI Premium soon. Basically we keep all features, specification on A8N-SLI Deluxe is available on A8N-SLI Premium. ASUS added a smart innovation on A8N-SLI Premium without SLI selector card,” an ASUS spokesperson said.
The main difference between previous generation ASUS A8N-SLI Deluxe and ASUS A8N-SLI Premium is the so-called AI Selector. ASUS A8N-SLI Premium mainboard incorporate AI (ASUS Intelligence) Selector, which adopted Pericom Semiconductor’s PCI Express Switch IC (integrated circuit) instead of a selector card.
AI Selector enables easy switching between single-GPU and dual-GPU modes by simply clicking on the mouse under Microsoft Windows operating system. Unlike in previous cases, there is no need to open the PC case and physically adjust the SLI selector card, which provides users an opportunity to disable Multi-GPU mode for games that malfunction because of it.
Heeter