Tech Question about Intel Graphics

Ok, so Intel have put their slow *** graphics on the i810 and i815 chipsets but does anyone know what these graphics cores actually run at and if you can overclock them?
Obviously the the i810 graphics runs on a 64bit 100Mhz memory bus as it uses system memory, but what is the core frequency of the chip and how many graphics pipelines does it have?

What about the DC 100 and DC 133 (i810e) boards with 4Mb Zbuffer cache, what bus does this memory use?

Intel site is too full of promo stuff to actually find the technical data so if anyone has any idea I'd like to hear

Thanks



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