In article <2mq8n5Fou43oU1@uni-berlin.de>, Axel Neumann wrote:

>You will never see a US-IV chip in a US-IIIi system.

>AFAIK the US-IV is not 100% pin compatible with the US-III. Also the US-III
>chip is not pin compatible with the US-IIIi. In addition the design is
>different.

>So putting a US-IV chip into a Blade 2500 or any other system would require
>a totally new mobo.

In theory Sun could make the US-IV available in any system which currently
uses US-III (Sun Blade 2000, V480, V880 etc). Although it isn't pin
compatible with US-III the system bus architecture is the same and the
US-III systems have CPU boards which plug into the system bus. I'd
expect Sun to produce such boards, it just takes them a while to do as
they usually get the new CPUs into the larger (higher profit margin)
systems first.

--
Phillip Fayers School of Physics & Astronomy, Cardiff University (*).
[ (*) - the official trading name of the University of Wales, Cardiff. ]
P.Fayers@astro.cf.ac.uk http://www.astro.cf.ac.uk/pub/Phillip.Fayers/
Tel: +44 (0)29 2087 5282 Attribute these comments to me, not UWC.