Dubbed "Larrabee", the chip was unveiled at this year's SIGGRAPH conference and sports a variety of new technical features, including a fully coherent memory subsystem which allows for more efficient multi-chip implementation.
Should the x86-based graphical rendering capabilities prove viable to developers, Larrabee could serve as a cost-efficient alternative to expensive PC video cards, such as those produced by AMD and Nvidia. TechReport explains the chip and its features as follows:
One potential positive of Larrabee's fully coherent memory subsystem is the possibility of much more efficient multi-chip implementations. Nvidia and AMD are essentially managing the coherency problem manually via custom game profiles for multi-GPU setups right now. When I asked about this issue, Intel said it didn't expect to have the same pain as its competitors in this area.
The possible downsides of all-software implementations of things like the render back-end are also rather apparent. We saw this illustrated nicely when the Radeon HD 4800 series brought a vast improvement over the shader-based MSAA resolve used in the Radeon HD 2900 and 3800 series products.
Somewhat comically, the initial reactions to the Larrabee architecture disclosures from Intel are mixed along clear dividing lines. When I pinged David Kanter, the CPU guru at Real World Tech, about it, he was very much impressed with the choices Intel had made and generally positive about the prospects. Meanwhile, Rys over at Beyond3D expressed quite a bit of skepticism about the chip's likely performance and area efficiency for graphics versus more traditional architectures.
Intel expects engineering samples of the chip by the end of the year, followed by a general market release in late 2009 to early 2010.