Re: 64-bit PCI slots

Greg Morrison (gregm@earthlink.net)
Wed, 11 Dec 1996 23:26:28 -0800

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Maybe in reply to: Ryan Rafferty: "64-bit PCI slots"

Ryan Rafferty wrote:
>
> I've been looking at the PC164 boards being offered by DCG, and they come
> with two 64-bit PCI slots as well as two standard 32-bit slots.
>
> I've looked around, but I've never seen a 64-bit PCI bus on any
> Intel-based board; I assume they don't exist (yet). Are there any cards
> out there that actually take advantage of 64-bit PCI? I'm sure graphics
> performance would be pretty damn good, but as far as I know there isn't a
> single card made for the extended slot.
>
> Thanks,
> Ryan
>
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I am aware of two 64 bit PCI cards for the Alpha. The first is part of
the Evans and Sutherland Freedom graphics system and connects the system
to the Alpha station. The card is not a graphics accelerator, just a
connector for the tower sized graphics system which holds up to 320MB of
VRAM! The second is a memory channel card for Digital Unix memory
channel clusters. Both of these cards are supported on a limited number
of systems. Rumor has it that DEC will be releasing some 64bit PCI
"communications" cards in the future as well as some high end graphics
products.

Allegedly Intel has refrained from releasing a 64 bit PCI product
because they effectively lost control of the standard when DEC shipped a
64 bit PCI chipset and they do not want to lend any legitimacy to it.

gregm@earthlink.net

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