On Nov 14, 2008, at 10:00 AM, Curtis H. Wilbar Jr. wrote:
I think the 20
can actually do quad-CPU; while it has only two Mbus
slots, I seem to recall that someone made Mbus modules with two
CPUs in
a single Mbus form factor.
It can do quad... Sun had the SM52X (2 SM51s on a almost
double wide cpu card... you could the put two of them in.
Downside was you lost 2 sbus slots. The Sun sold Hypersparc
module HS12 was a dual 100mhz cpu (I believe it was normal
width... so you didn't lose sbus slots to go quad).
Just avoid the SM100 modules like the plague...they were slower
than pissing tar. You could take an SS20 (or an SS10, or a 4/600MP)
to four processors that way, but they were painful to use. They were
sold by Sun but based on an early Ross chipset, though I don't recall
which one.
-Dave
--
Dave McGuire
Port Charlotte, FL