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Yet Another Serial Graphics Bus From Intel
ottotto writes: "Techweb has a story about Intel's High Speed Graphics Initiative. After discussing another doubling of the AGP, VP Pat Gelsinger said "The next part of that road map is AGP8x, an evolutionary step from AGP4x, to be followed by a future serial graphics bus." ANOTHER serial graphics bus? Is not the upgrade path to IEEE 1394B (800 Mbps Fire Wire) and beyond sufficent? Is this, along with the USB 2.0 spec another
way around giving any credit or royalties to Apple?" I suppose companies have to make their plans somehow, and new products are better than living in the 1960s forever. But sometimes these "roadmaps" (which often turn out to be more like directions scribbled on the backs of napkins) seem to smack of planned obsolesence. Do you ever skip the current latest/greatest because you know what's around the corner?
There are really two questions people seemed to be confused over:
There is only one reason for more bandwidth: 3D graphics. AGP was originally designed so that graphics cards could use main memory for textures. Alas, it was too slow, and graphics card vendors began to just pile up RAM on the video card. However, most people don't realize that textures aren't the only thing sent down bus. Polygon data needs to be sent down every frame as well. Enter hardware transform and lighting. Suddenly games are starting to be designed with a LOT more polygons. Due to things like animation and dynamic level of detail, this polygon data can't just be stored on the graphics card like textures are, they have to be downloaded every frame. If you extrapolate the curve of supported polygons / second by the history of Nvidia cards, you'll see that AGP4X and AGP8X will be saturated relatively soon. All graphics card vendors (except maybe 3dfx, we'll see what they say after the Rampage ships) are clamoring for more bandwidth.
The reason for going to serial is physics oriented. Parallel wires switching at high speeds can generate electrical fields that cause signals in nearby wires to change. This is known as crosstalk (or noise). This is the reason that Rambus (16-bit 400 MHz) is so hard to manufacture compared to SDRAM. Moving to a serial bus allows the clock speed to be cranked much, much, MUCH higher without worrying as much about data errors.
Dan
I'm becoming digusted with slashdot's journalistic ability. For all practical purposes, the link contains no information what so ever about a "Serial Graphics Bus" except that there might possibly be another one (and couldn't you assume as much?), and yet it's important enough for the title of the post?
We can't even know what they mean a "Serial Graphics Bus", but I would bet its not a replacement for Firewire or USB. Please save the mindless speculation for the comment area
If slashdot wants to be a rumor site, how about you post some real rumors?
Actually Apple shares all the royalties from IEEE1394 licensees with a consortium of other manufacturers including Sony (who brand it as iLink), Canon, etc. read all about it: http://www.1394la.com/lic_agreement.html
lisa bonet ate no basil
The problem with these crazy hardware plans is that they're adding additional cost and waste for people who don't need it. AGP was nice...for gamers. Didn't make a bit of difference for anyone else. And in all honesty it didn't do anything for gamers either. All that talk about using main RAM for textures went away, and video card makers just starting putting more and more VRAM on their cards. Everyone lost. Kinda like MMX.
Intel needs to stop taking niche products and pushing them to everyone as a necessity. How about just focusing on decent processors, okay?