From: Darryl E. Marsee (fcldem@nersp.nerdc.ufl.edu)
Date: Thu Feb 13 2003 - 12:26:38 EST
Greetings.
I have two 280R's, each with 4GB RAM. One (call it system A) has
4x1GB DIMMS; the other (system B) has 8x512MB DIMMS. I want to
replace 4 of the 512MB DIMMS in system B with 1GB DIMMS, then take
those removed 512MB DIMMS and put them into system A, giving a new
total of 6GB RAM in each system. No problem, right?
Well, Sun has two option numbers for 4x1GB DIMMS for a 280R: X7052A
and X7063A. The 7063 is quite a bit cheaper, so I'd like to go with
it if I can, but it uses the new differentiated DIMMS (which also work
in the SunBlade 1000/2000) while the 7052 uses the older style DIMMS.
Our existing memory is the older style, and on Sunflash I found:
Q. Can I mix and match differentiated DIMMs with previous DIMMs
used by Sun Blade 1000/2000?
A. Yes. It is possible to mix and match differentiated DIMMs with
previous DIMMs in a Sun Blade 1000/2000 without any degradation
of performance or change in funcionality. You can mix and match
DIMMs even within the same memory bank. Please note: this mixing
and matching of DIMMs ONLY applies to Sun Blade 2000/1000.
This appears to say I can't mix the two types in a 280R, even if
they're in separate banks, but I could find no other reference to this
incompatibility elsewhere to verify it, including on Sunsolve. I
don't want to buy the less expensive memory and then have it not work
with my existing memory, nor do I want to pay more for the older style
memory if I don't have to. So, my question is: does anyone know for
certain if the two types of DIMMS can happily coexist in separate
banks within the same 280R?
I'll summarize any answers to the list.
Regards,
Darryl Marsee
Florida Center for Library Automation
fcldem@nersp.nerdc.ufl.edu
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