Re: Adapter board 3.3V regulators

["Don Abernathey" <dla@pyramid.com>]

On Aug 19, 10:05am, Jim Holeman wrote:
> Subject: Re: Adapter board 3.3V regulators
---snip---
> Systems implementing 5V signaling are _NOT_ required to provide 3.3v in
their
> system.  See Section 4.3.4.1.
>     "System vendors are nonetheless encouraged to provide 3.3V power for
>      PCI slots....."
> As a board designer, I'd love to see a guarantee of 3.3V from the system.
> But it's not guaranteed....If you want 3.3V on your card in a 5V system,
then
> you'd better generate it yourself from 5V or from 12V.
---snip---

Hello!

Does someone know which vendors do and don't provide +3.3v power?

It is true that spec says they don't have to, but they are supposed to
provide an upgrade path. Therefore most motherboards have +3.3v wired
to the slots. It has been up to the system vendor to provide a power
supply with +3.3v.

I'm sure that most high-end system vendors have +3.3v power to the PCI
slots, but I don't know if the Gateways, Dells, and Microns have
+3.3v.

Does someone know where I could find out?


*************************
Thank you               |
	Don Abernathey  |
(503)690-6234           |
dla@pyramid.com         |
*************************

R
¸	§