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Conference vaxaxp::alphanotes

Title:	Alpha Support Conference
Notice:	This is a new Alphanotes, please read note 2.2
Moderator:	VAXAXP::BERNARDO

Created:	Thu Jan 02 1997
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	128
Total number of notes:	617

100.0. "Memory SImms of pc on Alpha" by LISVAX::RIBEIRO_N (NELSON RIBEIRO @XIP) Wed May 07 1997 13:12

Hi all,
recently i have been assigned a call about a Alphaserver 1000.

It was an hardware problem so i went to the costumer's office to see it.
The machine had 64 Mb of memory in 4 simms of 16 Mb. The simms had the following
part-number 54-23170-AA, which i ordered with no problem at all. After i few
test i decided to change the ECC simm which had the part-number 54-23170-KA, and
the problems began.

While i was searching the ECC simm  to this machine i didn't find anything
mentioning that the ECC simm for this machine was 54-23170-KA, instead i found
that this part-number is not applied to any of the alpha systems, but it is
applied to the venturis pc line. 
Then why was it installed on this machine? Human error or just lack of
information on my side?

And what is the part-number for the ECC simm for this machine? 
I found some information while wondering in the net about these machines should
have all of the simms (including the ECC) of the same type (same part-number).
Is this correct?

I need some help because althought now the machine is not crashing every hour,
it has crashed two times on the previous 4 days.

Need help, please,
NelsonR.

T.R Title User Personal
Name Date Lines

100.1 memory simms on alphaserver1000 CSC32::HUTMACHER Wed May 07 1997 16:55 28

T.R	Title	User	Personal Name	Date	Lines
100.1	memory simms on alphaserver1000	CSC32::HUTMACHER		`Wed May 07 1997 16:55`	28
	Hi Nelson asrv1000/1000a 4/xxx systems need qty=5 simms per bank of memory qty=4 data simms and qty=1 ecc simm they are usually all the same size in your case you could use 54-23170-ba instead of 54-23170-ka ecc simm but there was a cost reduced memory option shipped on some systems that has qty=4 16meg data simms and qty=1 ecc simm that only has 1/4 of the data rams on it and can only be used ecc simm not for data simm from BOM pb7ma-bc 64mb option consisting of four 54-23170-ba 4mx36.1 inch simm 60ns and one 54-23170-ka 4m x 16 (ecc bit) simm asrv1000/1000a 5/xxx systems do not need a ecc simm at all since the EV5 cpu uses a differnet parity scheme and no need for ecc simm there is asrv1000/1000a notesfile at WRKSYS::MIKASA if needed jim hutmacher mvhs colorado csc 800-354-9000 ext 25561

    Hi Nelson
    
    asrv1000/1000a 4/xxx systems need qty=5 simms per bank of memory
    qty=4 data simms and qty=1 ecc simm
    
    they are usually all the same size
    
    in your case you could use 54-23170-ba instead of 54-23170-ka ecc simm 
    
    but there was a cost reduced memory option shipped on some systems
    
    that has qty=4 16meg data simms and qty=1 ecc simm that only has 
    1/4 of the data rams on it and can only be used ecc simm not for
    data simm
    
    from BOM
    
    pb7ma-bc  64mb option consisting of four 54-23170-ba 4mx36.1 inch
              simm 60ns and one 54-23170-ka 4m x 16 (ecc bit) simm
    
    asrv1000/1000a 5/xxx systems do not need a ecc simm at all since
    the EV5 cpu uses a differnet parity scheme and no need for ecc simm
    
    there is asrv1000/1000a notesfile at WRKSYS::MIKASA if needed
    
    jim hutmacher mvhs colorado csc 800-354-9000 ext 25561