https://web.archive.org/web/19961219045007/http://www.pc.ibm.com/techlink/f960105a.htmlI have two 16 Mb 70ns 5v EOS Simms. Has these any use for PS/2 PCs?
========================================================================= Date: 96/01/05
Subject: EOS memory reliability and technology advantages
1) EOS does ECC on a byte boundary, so at any given address, EOS is
capable of fixing EIGHT!!! single-bit errors at a time (remember that
for an 8-byte interface, EOS must be used in pairs, hence 8 errors). A
Compaq Prosignia 300/Proliant 1500 does standard ECC on an 8-byte
boundary and can correct only 1 bit per address. A Compaq Proliant
2000/4000 uses "advanced" ECC which is done across 16 bytes. Using this
wide ECC word, they can correct any given bad 4-bit DRAM, or 4 bits/16
bytes (2 bits/8 bytes). In marketing lingo, this translates to EOS being
4X more powerful an ECC scheme!!! How-ever, that is really stretching
things ;-) Note that "advanced" ECC requires SIMMs to be plugged in
sets of 4 instead of set of 2.
2) Performance can be better with EOS. Native ECC has to pay a several
cycle performance hit any time a word less than the bus width (8
bytes/16 bytes) gets written. Much attention can be paid to minimize
this effect with posted-write buffers, but the final impact can range
from near 0% to 20%, depending on the code being run (lots of byte
writes) and the cleverness of the implementation (byte-write gathering scheme). I have never attempted to see if native ECC running X-2-2-2
with 60ns EDO is better than EOS at 70ns with no byte writes...perhaps
we should call that case a draw.
3) Per the above mentioned presentation, upwards of 95% of all memory
errors are caused by soft errors. A rule of thumb I use is 1 soft error
per month per 256MB of memory. Because of this, one could argue that
having an error reporting scheme is counterproductive. The customer will
see these soft errors periodically and think his memory should be
changed, while in fact the fails are unavoidable (unless you're 50 feet underground) and should be ignored. Having good error reporting was
actually a major thorn in the side of our S/390 brethren because the
customer could tell whenever a soft error was occurring, but their competitors did not have good reporting in their boxes, so they seemed
to be better off! I don't know how you argue this one with the customer...good luck!
4) EOS is a much more flexible solution. If today's mission critical department server becomes tomorrow's uncritical print server, the EOS
memory can be swapped out for regular parity SIMMs and the ECC function
can be moved to another machine that may not have native ECC. This flexibility of moving the ECC via EOS to the machines that need it could
be a powerful argument for a smart IS group supporting a large
enterprise with many PCs.
5) EOS is, in a sense, much more highly redundant than native ECC. If
the ECC algorithm in a native ECC memory controller goes bad, then all
of the memory goes bad. If the circuitry in one of the distributed ECC
chips on the EOS SIMMs goes bad, only one byte of one SIMM goes bad, and
the OS has a chance of deallocating that memory and marching forward.
Nice that someone is awake.
Buzzkill, the EOS reports itself as parity, so the system in question
has to support 16MB parity SIMMs.
9585 -X or -K/N
4MB and 8MB EOS are supported by all PS/2s, as their size is supported.
The IBM ECC-on-SIMM (EOS) part numbers are
11H0618 (8MB)
11H0621 (16MB)
11H0624 (32MB)
Lead composition:
11D - Tin
11E - Gold
ECC controller on EOS is 73G6876.
These are a sea of gates, not a specific ASIC
Toshiba TC160G11AT
AMI 6553-013
https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/5/897/ENUS195-075/index.html&request_locale=en
Options by IBM: IBM ECC-on-SIMM Memory Upgrades
Announcement Number: 195-075
Normal Height: 26.4mm
Tall Height: 41.7mm
Wide Width: 14.2mm
Normal Width: 10.1mm
+-------------------------------------------------------------------+
| o SEC high-speed ECC algorithm |
| o 70ns (x36 bits) 72-pin JEDEC standard SIMM |
| o IBM or industry standard presence detects, gold tabs |
| o Fit in standard x36 SIMM socket |
| o No processor changes required |
| |
| o 4MB (Wide) 70ns ECC-on-SIMM Memory Upgrade: |
| - Selected PS/2(R) and IBM PC Server 300 and 320 systems |
| |
| o 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade: |
| - Selected PS/2 systems |
| |
| o 8MB (Tall), 16MB, and 32MB 70ns ECC-on-SIMM Memory Upgrades: |
| - IBM PC Server 300 and 320 systems | +-------------------------------------------------------------------+
The following memory options complement the Options by IBM family of offerings:
4MB 70ns ECC-on-SIMM Memory Upgrade
8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade
8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade
16MB 70ns ECC-on-SIMM Memory Upgrade
32MB 70ns ECC-on-SIMM Memory Upgrade
The IBM ECC-on-SIMM Memory Upgrades offer 4MB, 8MB, 16MB and 32MB of error-correcting-code (ECC) memory on a SIMM. This upgrade family -- a plug-compatible, fully retrofittable series of 70ns memory modules --
allows you to upgrade a parity system to a fully functional single-error-correct (SEC) ECC system. The ECC function is completely self-contained on the SIMM and provides correction of single-bit errors that
occur in each byte of SIMM data. No processor changes are required to receive the enhanced reliability this SIMM family offers.
The ECC-on-SIMM Memory Upgrades are organized as x36 bits, support
parity, and are packaged on a 72-pin JEDEC (Joint Electronic Device Engineering Council) standard SIMM with gold tabs. The 4MB SIMM has IBM
presence detects, while the 8MB (Tall and Wide), 16MB and 32MB SIMMs
have industry standard presence detects.
Use of the ECC-on-SIMM Memory Upgrades is recommended when processing critical applications on systems without native ECC. Enhanced data
integrity and memory reliability are provided with no system performance
penalty. The upgrades are extremely important in server environments
where single-bit memory errors can impact all users on the network.
Part Availability Unit
Description Number Date Price
4MB 70ns ECC-on-SIMM 75G6500
8MB (Wide) 70ns ECC-on-SIMM 75G6501
8MB (Tall) 70ns ECC-on-SIMM 11H0618
16MB 70ns ECC-on-SIMM 11H0621
32MB 70ns ECC-on-SIMM 11H0624
IBM 4MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1500, 75G6500)
The 4MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 1M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and IBM presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.4 in.)
Weight: .025kg (0.055 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1620 mA max
Hardware Requirements: The 4BM 70ns ECC-on-SIMM Memory Upgrade (#1500, 75G6500) is supported on the following IBM platforms:
Machine
Description Type Model
PS/2 8525 K00, K01, L02
8535 040, 043, 050, 055,
14X, 24X
8540 040, 043, 045
8556 043, 045, 055, 059,
14X, 15X, 24X, 25X
8557 045, 049, 055, 059,
05F, 259
8590(1) 0J5, 0J9, 0JD, 0JF,
0K9, 0KD, 0KF, 0GF,
0G5, 0G9, 0HF, 0H5, 0H9,
0L9, 0LF
8595(1) 0J9, 0JD, 0JF, 0KD,
0KF, 0G5, 0G9, 0GF,
0H5, 0H9, 0HF, 0L9,
0LF, 0X6, 0XA, 0XF,
0XG
9553 0B7, 0BB, 1BX, 2BX
9556 DBA, DB6, DEB, DED,
DE9, KBA, KB6, QBA,
QB6, 0BA, 0B6, 1EX, 2EX
9557 DBA, DBG, DB6, DEB,
DED, DEG, DE9, KBA,
KBG, KB6, QBA, QB6,
0BA, 0B6, 1BA, 2BA,
6EB, 6EG, 7EB, 7EG
9576 DUA,DU6, KUA, KU6,
QUA, QU6, 0UA, 0U6
9577 DNA, DNG, DUA, DUG,
KNA, KNG, KUA, KUG
QBA, QB6, QNA, QUA,
0NA, 0NF, 0UA, 0UF,
1NA, 1UA,
9585(1) 0X6, 0XA, 0XF, 0XG,
0KG, 0KT, 0NG, 0NT
9590(1) DLA, 0LA, QLA, KLA,
0LF, DLG, KLG
9595(1) 0LF, 0LG
PC Server 8640(1) 0N0, 0NJ, 0P0, 0PT,
0Y0, 0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 75G6500
upgrades.
Limitations
Parity memory cannot coexist with the 4MB 70ns ECC-on-SIMM Memory
Upgrade in the same system.
8590, 8595, 9590, and 9595 models with native ECC (xMx,1Nx, xPx,
xQx, xTx, xVx) are not supported.
IBM 8MB (WIDE) 70NS ECC-ON-SIMM MEMORY UPGRADE (#6501, 675G6501)
The 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade module is organized as 2M
x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM
with gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 14.2 mm (0.56 in.)
Weight: .041 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1656 mA max
Hardware Requirements: The 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade (#6501, 675G6501) is supported on the following IBM platforms:
Machine
Description Type Model
PS/2 8556 043, 045, 055, 059,
14X, 15X, 24X, 25X
8557 045, 049, 055, 059,
05F, 259
8590(1) 0J5, 0J9, 0JD, 0JF,
0K9, 0KD, 0KF, 0G5,
0G9, 0GF, 0H5, 0H9,
0HF, 0L9, 0LF
8595(1) 0J9, 0JD, 0JF, 0KD,
0KF, 0G5, 0G9, 0GF,
0H5, 0H9, 0HF, 0L9,
0LF, 0X6, 0XA, 0XF,
0XG
9556 DBA, DB6, DEB, DED,
DE9, KBA, KB6, QBA,
QB6, 0BA, 0B6, 1EX,
2EX
9557 DBA, DBG, DB6, DEB,
DED, DEG, DE9, KBA,
KBG, KB6, QBA, QB6,
0BA, 0B6, 1BA, 2BA,
6EB, 6EG, 7EB, 7EG
9576 DUA, DU6, KUA, KU6,
QUA, QU6, 0UA, 0U6
9577 DNA, DNG, DUA, DUG,
KNA, KNG, KUA, KUG,
QBA, QB6, QNA, QUA,
0NA, 0NF,0UA, 0UF,
1NA, 1UA
9585(1) 0X6, 0XA, 0XF, 0XG,
0KG, 0KT, 0NG, 0NT
9590(1) DLA, 0LA, QLA, KLA,
0LF, DLG, KLG
9595(1) 0LF, 0LG
(1) These systems must be upgraded with sets of two 75G6501 upgrades.
Limitations
Parity SIMMs cannot coexist with the IBM 8MB (Wide) 70ns
ECC-on-SIMM Memory Upgrade in the same system.
8590, 8595, 9590, and 9595 models with native ECC (xMx, 1Nx, xPx,
xQx, xTx, xVx) are not supported.
Maximum system memory is not attainable on 8556, 8557, 9556, 9557,
9576, and 9577 models due to physical constraints:
Two 8MB (Wide) ECC-on-SIMM Memory Upgrades cannot be installed
in adjacent SIMM sockets.
Models with three SIMM sockets have a maximum of two 8MB (Wide)
and one 4MB ECC-on-SIMM Memory Upgrades.
Models with four SIMM sockets have a maximum of two 8MB (Wide)
and two 4MB ECC-on-SIMM Memory Upgrades.
IBM 8MB (TALL) 70NS ECC-ON-SIMM MEMORY UPGRADE (#1681, 11H0618)
The 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade module is organized as 2M
x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM
with gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 41.7 mm (1.64 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Weight: .039 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1656 mA max
Hardware Requirements: The 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade is supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0618
upgrades.
Limitations: Parity SIMMs cannot coexist with the 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade in the same system.
IBM 16MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1621, 11H0621)
The 16MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 4M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and industry standard presence detects.
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Weight: .025 kg (0.06 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1440 mA max
Hardware Requirements: The 16MB 70ns ECC-on-SIMM Memory Upgrade is
supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0621 upgrades.
Limitations: Parity SIMMs cannot coexist with the 16MB 70ns ECC-on-SIMM Memory Upgrade in the same system.
IBM 32MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1624, 11H0624)
The 32MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 8M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Length: 41.7 mm (1.64 in.)
Weight: .039 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1464 mA max
Hardware Requirements: The 32MB 70ns ECC-on-SIMM Memory Upgrade is
supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,So mine two 11H0621 has only use in PC Server 8640 that I don´t have.
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0624 upgrades.
Limitations: Parity SIMMs cannot coexist with the 32MB 70ns ECC-on-SIMM Memory Upgrade in the same system.
So mine two 11H0621 has only use in PC Server 8640 that I don´t have.
Nice that someone is awake.
Buzzkill, the EOS reports itself as parity, so the system in question
has to support 16MB parity SIMMs.
9585 -X or -K/N
4MB and 8MB EOS are supported by all PS/2s, as their size is supported.
The IBM ECC-on-SIMM (EOS) part numbers are
11H0618 (8MB)
11H0621 (16MB)
11H0624 (32MB)
Lead composition:
11D - Tin
11E - Gold
ECC controller on EOS is 73G6876.
These are a sea of gates, not a specific ASIC
Toshiba TC160G11AT
AMI 6553-013
https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/5/897/ENUS195-075/index.html&request_locale=en
Options by IBM: IBM ECC-on-SIMM Memory Upgrades
Announcement Number: 195-075
Normal Height: 26.4mm
Tall Height: 41.7mm
Wide Width: 14.2mm
Normal Width: 10.1mm
+-------------------------------------------------------------------+
| o SEC high-speed ECC algorithm |
| o 70ns (x36 bits) 72-pin JEDEC standard SIMM |
| o IBM or industry standard presence detects, gold tabs |
| o Fit in standard x36 SIMM socket |
| o No processor changes required |
| |
| o 4MB (Wide) 70ns ECC-on-SIMM Memory Upgrade: |
| - Selected PS/2(R) and IBM PC Server 300 and 320 systems |
| |
| o 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade: |
| - Selected PS/2 systems |
| |
| o 8MB (Tall), 16MB, and 32MB 70ns ECC-on-SIMM Memory Upgrades: |
| - IBM PC Server 300 and 320 systems | +-------------------------------------------------------------------+
The following memory options complement the Options by IBM family of offerings:
4MB 70ns ECC-on-SIMM Memory Upgrade
8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade
8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade
16MB 70ns ECC-on-SIMM Memory Upgrade
32MB 70ns ECC-on-SIMM Memory Upgrade
The IBM ECC-on-SIMM Memory Upgrades offer 4MB, 8MB, 16MB and 32MB of error-correcting-code (ECC) memory on a SIMM. This upgrade family -- a plug-compatible, fully retrofittable series of 70ns memory modules --
allows you to upgrade a parity system to a fully functional single-error-correct (SEC) ECC system. The ECC function is completely self-contained on the SIMM and provides correction of single-bit errors that
occur in each byte of SIMM data. No processor changes are required to receive the enhanced reliability this SIMM family offers.
The ECC-on-SIMM Memory Upgrades are organized as x36 bits, support
parity, and are packaged on a 72-pin JEDEC (Joint Electronic Device Engineering Council) standard SIMM with gold tabs. The 4MB SIMM has IBM
presence detects, while the 8MB (Tall and Wide), 16MB and 32MB SIMMs
have industry standard presence detects.
Use of the ECC-on-SIMM Memory Upgrades is recommended when processing critical applications on systems without native ECC. Enhanced data
integrity and memory reliability are provided with no system performance
penalty. The upgrades are extremely important in server environments
where single-bit memory errors can impact all users on the network.
Part Availability Unit
Description Number Date Price
4MB 70ns ECC-on-SIMM 75G6500
8MB (Wide) 70ns ECC-on-SIMM 75G6501
8MB (Tall) 70ns ECC-on-SIMM 11H0618
16MB 70ns ECC-on-SIMM 11H0621
32MB 70ns ECC-on-SIMM 11H0624
IBM 4MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1500, 75G6500)
The 4MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 1M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and IBM presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.4 in.)
Weight: .025kg (0.055 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1620 mA max
Hardware Requirements: The 4BM 70ns ECC-on-SIMM Memory Upgrade (#1500, 75G6500) is supported on the following IBM platforms:
Machine
Description Type Model
PS/2 8525 K00, K01, L02
8535 040, 043, 050, 055,
14X, 24X
8540 040, 043, 045
8556 043, 045, 055, 059,
14X, 15X, 24X, 25X
8557 045, 049, 055, 059,
05F, 259
8590(1) 0J5, 0J9, 0JD, 0JF,
0K9, 0KD, 0KF, 0GF,
0G5, 0G9, 0HF, 0H5, 0H9,
0L9, 0LF
8595(1) 0J9, 0JD, 0JF, 0KD,
0KF, 0G5, 0G9, 0GF,
0H5, 0H9, 0HF, 0L9,
0LF, 0X6, 0XA, 0XF,
0XG
9553 0B7, 0BB, 1BX, 2BX
9556 DBA, DB6, DEB, DED,
DE9, KBA, KB6, QBA,
QB6, 0BA, 0B6, 1EX, 2EX
9557 DBA, DBG, DB6, DEB,
DED, DEG, DE9, KBA,
KBG, KB6, QBA, QB6,
0BA, 0B6, 1BA, 2BA,
6EB, 6EG, 7EB, 7EG
9576 DUA,DU6, KUA, KU6,
QUA, QU6, 0UA, 0U6
9577 DNA, DNG, DUA, DUG,
KNA, KNG, KUA, KUG
QBA, QB6, QNA, QUA,
0NA, 0NF, 0UA, 0UF,
1NA, 1UA,
9585(1) 0X6, 0XA, 0XF, 0XG,
0KG, 0KT, 0NG, 0NT
9590(1) DLA, 0LA, QLA, KLA,
0LF, DLG, KLG
9595(1) 0LF, 0LG
PC Server 8640(1) 0N0, 0NJ, 0P0, 0PT,
0Y0, 0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 75G6500
upgrades.
Limitations
Parity memory cannot coexist with the 4MB 70ns ECC-on-SIMM Memory
Upgrade in the same system.
8590, 8595, 9590, and 9595 models with native ECC (xMx,1Nx, xPx,
xQx, xTx, xVx) are not supported.
IBM 8MB (WIDE) 70NS ECC-ON-SIMM MEMORY UPGRADE (#6501, 675G6501)
The 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade module is organized as 2M
x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM
with gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 14.2 mm (0.56 in.)
Weight: .041 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1656 mA max
Hardware Requirements: The 8MB (Wide) 70ns ECC-on-SIMM Memory Upgrade (#6501, 675G6501) is supported on the following IBM platforms:
Machine
Description Type Model
PS/2 8556 043, 045, 055, 059,
14X, 15X, 24X, 25X
8557 045, 049, 055, 059,
05F, 259
8590(1) 0J5, 0J9, 0JD, 0JF,
0K9, 0KD, 0KF, 0G5,
0G9, 0GF, 0H5, 0H9,
0HF, 0L9, 0LF
8595(1) 0J9, 0JD, 0JF, 0KD,
0KF, 0G5, 0G9, 0GF,
0H5, 0H9, 0HF, 0L9,
0LF, 0X6, 0XA, 0XF,
0XG
9556 DBA, DB6, DEB, DED,
DE9, KBA, KB6, QBA,
QB6, 0BA, 0B6, 1EX,
2EX
9557 DBA, DBG, DB6, DEB,
DED, DEG, DE9, KBA,
KBG, KB6, QBA, QB6,
0BA, 0B6, 1BA, 2BA,
6EB, 6EG, 7EB, 7EG
9576 DUA, DU6, KUA, KU6,
QUA, QU6, 0UA, 0U6
9577 DNA, DNG, DUA, DUG,
KNA, KNG, KUA, KUG,
QBA, QB6, QNA, QUA,
0NA, 0NF,0UA, 0UF,
1NA, 1UA
9585(1) 0X6, 0XA, 0XF, 0XG,
0KG, 0KT, 0NG, 0NT
9590(1) DLA, 0LA, QLA, KLA,
0LF, DLG, KLG
9595(1) 0LF, 0LG
(1) These systems must be upgraded with sets of two 75G6501 upgrades.
Limitations
Parity SIMMs cannot coexist with the IBM 8MB (Wide) 70ns
ECC-on-SIMM Memory Upgrade in the same system.
8590, 8595, 9590, and 9595 models with native ECC (xMx, 1Nx, xPx,
xQx, xTx, xVx) are not supported.
Maximum system memory is not attainable on 8556, 8557, 9556, 9557,
9576, and 9577 models due to physical constraints:
Two 8MB (Wide) ECC-on-SIMM Memory Upgrades cannot be installed
in adjacent SIMM sockets.
Models with three SIMM sockets have a maximum of two 8MB (Wide)
and one 4MB ECC-on-SIMM Memory Upgrades.
Models with four SIMM sockets have a maximum of two 8MB (Wide)
and two 4MB ECC-on-SIMM Memory Upgrades.
IBM 8MB (TALL) 70NS ECC-ON-SIMM MEMORY UPGRADE (#1681, 11H0618)
The 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade module is organized as 2M
x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM
with gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Dimensions:
Height: 41.7 mm (1.64 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Weight: .039 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1656 mA max
Hardware Requirements: The 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade is supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0618
upgrades.
Limitations: Parity SIMMs cannot coexist with the 8MB (Tall) 70ns ECC-on-SIMM Memory Upgrade in the same system.
IBM 16MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1621, 11H0621)
The 16MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 4M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and industry standard presence detects.
Physical Specifications
Dimensions:
Height: 26.4 mm (1.04 in.)
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Weight: .025 kg (0.06 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1440 mA max
Hardware Requirements: The 16MB 70ns ECC-on-SIMM Memory Upgrade is
supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0621 upgrades.
Limitations: Parity SIMMs cannot coexist with the 16MB 70ns ECC-on-SIMM Memory Upgrade in the same system.
IBM 32MB 70NS ECC-ON-SIMM MEMORY UPGRADE (#1624, 11H0624)
The 32MB 70ns ECC-on-SIMM Memory Upgrade module is organized as 8M x 36, supports parity, and is packaged on a 72-pin JEDEC standard SIMM with
gold tabs and industry standard presence detects.
Technical Information
Physical Specifications
Width: 108 mm (4.25 in.)
Depth: 10.1 mm (0.40 in.)
Length: 41.7 mm (1.64 in.)
Weight: .039 kg (0.09 lb)
Operating Environment
Temperature: 0(degs)C to 65(degs)C (32(degs)F to 149(degs)F)
Relative humidity: 8% to 80%
Wet bulb: 23(degs)C (73(degs)F)
Electrical power: 1464 mA max
Hardware Requirements: The 32MB 70ns ECC-on-SIMM Memory Upgrade is
supported on the following IBM platforms:
Machine
Description Type Model
PC Server 8640(1) 0N0, ONJ, 0P0, 0PT, 0Y0,
0YT, 1Y0, 1YT
(1) These systems must be upgraded with sets of two 11H0624 upgrades.
Limitations: Parity SIMMs cannot coexist with the 32MB 70ns ECC-on-SIMM Memory Upgrade in the same system.
I'm awake. Just being quiet.
The quiet ones are the dangerous ones.Any reason why 11H0621/11H0622 would hang in a Reply TurboProcessor 80? The system boots but eventually hangs.
Don't want to be TOO quiet...
James Hall wrote:
I'm awake. Just being quiet.
Any reason why 11H0621/11H0622 would hang in a Reply TurboProcessor 80? The system boots but eventually hangs.
On Friday, March 31, 2023 at 9:33:38 AM UTC-4, Louis Ohland wrote:
The quiet ones are the dangerous ones.Any reason why 11H0621/11H0622 would hang in a Reply TurboProcessor 80? The system boots but eventually hangs.
Don't want to be TOO quiet...
James Hall wrote:
I'm awake. Just being quiet.
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 715 |
| Nodes: | 16 (2 / 14) |
| Uptime: | 41:24:02 |
| Calls: | 12,109 |
| Files: | 15,006 |
| Messages: | 6,518,410 |