CH said:
I have seen something below, it support 12GB of RAM.
http://www.intel.com/design/servers/se7501hg2/index.htm?iid=ipp_srvr_mthrbds+se7501hg2_srvr&;
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And it's also ECC memory; a nice plus. Actually, the Wintel
architecture will support up to 32GB or RAM but Windoze and Intel
processors are still basically 32 bit creatures. Windoze would normally
only go up to 4GB which would be broken into 2GB application space and
2GB kernel space. On the machines with more than 4GB RAM Windoze has to
invoke Intel's PAE (Physical Address Extensions). A bit of hokyness and
sleight of hand that allows the physical memory to be used. As long as
the app can do its thing within 2GB all is well as Windoze will do all
the address diddling. Other than that the app has to learn how to play
the address diddling tricks itself. (shades of segment registers, eh?)
The real advantage of the G5 is that it has a true 64-bit processor and
64 bit address registers so it doesn't have to play these games to reach
above 4GB. And the 64-bit processor is compatible with the prior 32-bit
software.
I think the Wintel world is still confused as to how they're going to
get to 64 bits. Intel knows how they want to do it. AMD knows how they
want to do it. Microsoft (I think) has chosen the Intel way along with
(as Apple is happy to point out) (ugh!) emulation to support 32 bit.
Chuck Norcutt
Woburn, Massachusetts, USA
still running Wintel stuff despite years of dumb engineering decisions
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