In the past, printer manufacturers used proprietary memory
designs, but now, most of the top manufacturers are using
standard memory modules. This makes upgrading printer memory
cheaper and easier. However, some manufacturers of today's
printer memory, such as HP, require that 70ns SIMMs be used
in their printers.
Try high
speed, high performance memory for HP Printers
from www.memorystock.com
Memory Upgrade Specifications
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HP
128MB Memory Upgrades for Printers - |
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128MB
For HP LJ9000 # C9121A-PE
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128MB
For HP Printer LaserJet 4600 Series
# C7850A-PE |
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128MB
HP LaserJet 4100 100PIN DIMM #
C9121A-160104-PE |
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128MB
Kit for HP LaserJet 8500 8500N 8500DN
# C3913A-HPPR2-PE |
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128MB
Module for HP DesignJet 500 & DesignJet
800 # C2388A-HPPC0-PE
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HP
16MB Memory Upgrades for Printers - |
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16MB
Color LaserJet 8550 HP PR Mod #
C7843A-HPPRN-PE |
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16MB
For HP Color LaserJet (C3100A) #
C3146A-HPPRN-PE |
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16MB
For HP DesignJet 1050C (C6074A) #
C6251A-HPPRN-PE |
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16MB
For HP DesignJet 200 220 # D2676A-HPPRN-PE
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16MB
For HP DesignJet 2500CP 2000CP #
C6231A-HPPRN-PE |
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16MB
For HP DesignJet 650C C2859B/PSC3792A
# D2297A-HPPRN-PE |
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16MB
For HP LaserJet 4000 4000T #
C4142A-HPPR1-PE |
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16MB
For HP LaserJet 4000 4000T 400 EDO DIMM
# C4137A-HPPRN-PE |
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HP
32MB Memory Upgrades for Printers - |
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32MB
For HP Color LaserJet 5 # C2298A-HPPR1-PE
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32MB
For HP Color LaserJet 8550N 8550DN 8550MFP
# C7845A-HPPRN-PE |
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32MB
For HP Copyjet C3817A M C3819A #
C2298A-HPPR2-PE |
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32MB
For HP DesignJet 1050C (C6074A) #
C6252A-HPPRN-PE |
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32MB
For HP DesignJet 2500CP 2000CP #
C6232A-HPPRN-PE |
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32MB
For HP Dskjet 1600C/1600CM/1600CN
# D3578A-HPPRN-PE |
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32MB
For HP LaserJet 4000 4000T #
C4143A-HPP-1-PE |
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32MB
Kit For HP DeskJet 2500C # D3648B-HPPC0-PE
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HP
4MB Memory Upgrades for Printers - |
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4MB
EDO For HP LaserJet 1100 Series 1100/SE/XI
# C4135A-HPPRN-PE |
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4MB
For HP Color LaserJet (C3100A) #
C3132A-HPPRN-PE |
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4MB
For HP LaserJet 5L 5L-FS # C3148A-HPPR1-PE
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4MB
For HP Printer LaserJet II P #
HP33477B-PE |
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HP
64MB Memory Upgrades for Printers - |
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64MB
For HP DesignJet 1050C (C6074A) #
C6258A-HPPRN-PE |
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64MB
For HP LaserJet 4000 4000T #
C3913A-HPPR1-PE |
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64MB
For HP Printer Color LaserJet 8550
# C7846A-HPPRN-PE |
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64MB
HP DesignJet 5000 LaserJet 4550 #
C7848A-HPPRN-PE |
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64MB
HP PR DesignJet 500 Series 500PS 24/42
# C2387A-PE |
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64MB
Kit for HP DeskJet 2500C # D4543A-HPPC1-PE
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64MB
Kit for HP LaserJet 8500 8500N 8500DN
# C4143A-HPP-2-PE |
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HP
8MB Memory Upgrades for Printers - |
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8MB
For HP Color LaserJet (C3100A) #
C3133A-HPPRN-PE |
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8MB
For HP Color LaserJet (C3100A) #
C3133A-HPPRN-PE |
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8MB
For HP DesignJet 200 220 # C2066A-HPPRN-PE
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8MB
For HP LaserJet 4000 4000T #
C4141A-HPPR1-PE |
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8MB
For HP LaserJet 4000 Series LaserJet 4000
5000 8100 # C4136A-HPPRN-PE
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8MB
For HP LaserJet 5L 5L-FS # C3149A-HPPRN-PE
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You will find amazingly low rates on quality
HP Printer memory, with fast shipping and guarantees!
HPPrinterMemory.com is your online guide to buying HP Printer
Memory!
Click here
for a complete list of Hewlett Packard printer memory configurations
and OEM Part Numbers
Select your right HP Printer Memory
What are SIMMs?
Many HP printers take 72-pin
SIMMs ("PS/2" SIMMs).
What does that mean?
This depends on the kind
of printer you have. Some need SIMMs with parity, some can
take SIMMs with or without parity (SIMMs w/o parity are
a lot cheaper).
HP LaserJet IIISi, 4(M),
4Si(MX), DJ 1200C(/PS), PJ XL300(/PS), DnJ A/B, DnJ 200/220
and DnJ 600 printers:
- The SIMM needs parity.
Real parity, not "fake" (computed) parity.
- The SIMM needs to be FPM,
70ns or faster. EDO memory will work in some
printers, but not all.
- The Presence Detect pads
need to be connected correctly.
- N.B.:
HP's part numbers for parity SIMMs are
C2065A
and C2066A
(4MB and 8MB respectively).
Almost all other HP models
that take SIMM:
- The SIMM does not
need parity.
- The SIMM needs to be FPM,
70ns or faster. EDO memory will work in some
printers, but not all.
- The Presence Detect pads
need to be connected correctly.
- N.B.:
HP's part numbers for non-parity SIMMs are
C3132A
,
C3133A
and C3146A
(4MB, 8MB and 16MB respectively). There seem to be several
part numbers for 32MB SIMM, I have seen D2298A
,
D3578A
and KTH-NPVEC/32
.
Memory
types?
FPM stands for "Fast
Page Memory". This is an old memory type, usually found
at 70ns or 80ns. Anything 60ns or faster stands a good chance
of being EDO, though there is 60ns FPM memory. You cannot
tell FPM and EDO memory apart by just looking at the module;
though you can look up the part number of the memory chips
used and see whether they are FPM or EDO memory.
To tell memory with parity
apart from memory without parity, simply count the number
of memory chips on the module. If it has 9 or 18 memory
chips, all alike, it has parity. If it has 4 or 8 or 16
memory chips, all alike, it does not have parity.
If your module has 8/16 (unlikely to be 4) memory chips
and then another 1/2 chips that are not memory (but probably
"in line" with the memory chips, like this: MMMMcMMMM),
then it most likely has computed parity rather than real
parity and will not work in a printer that needs parity.
What looks like a parity module might also be ECC, though;
so be sure what you are getting before you get it.
Regarding EDO SIMMs: Whether
this works depends on your printer model. Seriously though,
we have had reports of successful use, and reports of unsuccessful
use.
The memory controller has to support EDO if there is to
be any chance of it working. With older printer models,
that is probably not the case.
Mixing FPM and EDO is discouraged, because it is not stable
at what was considered high memory access speed in those
days. However, since HP says "80ns or slower",
we do not necessarily see a problem in using EDO, as long
as it works: Even though the built-in memory will be FPM,
and thus you are mixing.
ECC memory is error-correcting
memory and will never work in a HP printer, though it will
physically fit.
Regarding speed: 70ns or
faster means you can take a 60ns SIMM, encode it as 70ns,
and it will work. We have successfully done this. HP actually
quotes 80ns, or "80ns or slower", but we like
to be very conservative about this kind of thing. SIMMs
you buy nowadays will be 60ns, anyway.
Presence
Detect pads?
Right. Pads (or pins, if
you so will) 67 to 70 on a 72-pin SIMM encode the size and
speed of that SIMM. Each of them can either be open or connected
to GND (ground). Look at a SIMM you took out of your PC.
Chances are you will see traces running from pads 67 to
70 to empty points where a solder blob or SMD resistor would
fit. If the traces run to actual solder blobs or zero ohm
SMD resistors, then the SIMM has been encoded already ...
it just remains to be found out whether it has been encoded
correctly.
PC clones, as a rule, do
not use the Presence Detect pads on a SIMM. That's why the
pads are (usually) left unsoldered. Furthermore, there is
no standard for the encoding of these pads. IBM has their
own way, as does HP, as does Dell, as do others.
So the printer
recognizes memory just by the pattern on these pads?
Exactly. If all four pads
are open (no solder blobs, no resistors), then the printer
will not "see" the extra RAM ... it's as if you
never put that SIMM in there. Once you put some solder over
the right points on the SIMM, you have magically transformed
a $39 SIMM into a $150+ HP printer memory expansion.
Test of Hewlett Packard LaserJet 1100 series printers with
added RAM memory show these dramatic performance improvements
with spreadsheets, slide sets, desktop publishing, and web
printing:
- Adding 4MB of DRAM for a total of 6 MB reduces output
times by 30 to 80 percent
- Adding 10MB of DRAM for a total of 12MB virtually ensures
no "memory out" errors
Hewlett Packard LaserJet 2100 series printers require 20
MB total to print multi page 1200 dpi documents with comparable
performance 600 dpi documents. Examples using 20 MB:
- Output time reduced by 66% with a 10-page slide set
- Output time reduced by 33% with a 5-page report
- Output time reduced by 66% with a 10-page HTML file
Shared
Monochrome Printing |
Tests using Hewlett Packard LaserJet 4000, 5000, and 8000
series printers show a range of performance improvements
when base RAM is supplemented. Users should consider
adding RAM if they frequently print the following:
- Multiple-copy slide sets - print time reduced more than
50% by upgrading to 36 MB
- Web-based HTML files- print times reduced by 30% by
upgrading to 20 MB
- PDF files - print times reduced by 50% and errors avoided
by upgrading to 24 MB
- Multi page general office documents - print times reduced
by more than 50% by upgrading to 20 MB
RAM is especially critical to reducing print times of color
files. Tests of Hewlett Packard Color LaserJet 4500
and 8500 series printers showed that increased RAM would
improve performance in these categories:
- General Office - print-time reduction is 30% and errors
is eliminated with 48 MB
- Color Presentations - Print-time reduction is 40% with
a total of 64 MB; with two-sided documents, an additional
16% performance improvement is achieved with 96 MB
- Graphics-Rich Files - when testing vector drawings and
TIFF images, print times for large 8 by 10 inch images
decrease by 24% with a total of 56 MB
- Desktop Publishing - print-time reduction is 30% is
achieved with a total of 96 MB