IBM Aptiva M53
(250-0443) System Memory Faxback Doc. # 17855
Your system board has four memory module sockets. Your computer comes with
memory modules installed in Socket 1 and Socket 2. For example, if you
have 8 MB of RAM, a 4 MB memory module is installed in Socket 1 and a 4 MB
memory module is installed in Socket 2. For 16MB, two 8 MB memory modules
are installed.
You can install additional memory modules in Sockets 3 and 4. You can
also replace the existing memory modules with modules that have higher
memory capacity. The maximum amount of memory you can install is 128 MB.
Socket 1 and Socket 2 work together as a set. Socket 3 and Socket 4 also
work together as a set. When adding or replacing memory modules, you must
fill both sockets in a set. You must also use two memory modules of the
same size and type.
For example, if you install an 8 MB memory module in Socket 3, you must
also install an 8 MB memory module in Socket 4. Use these guidelines when
adding memory modules:
* If you install a memory module in one socket, you must also
install a memory module in the other socket in the set.
* The memory modules you install in the two sockets must be the
same size. For example, you cannot install a 4 MB memory
module in Socket 3 and an 8 MB memory module in Socket 4.
* You can use two sets of different size memory modules. For
example, you can have two 4 MB memory modules installed in
Socket 1 and Socket 2, and two 8 MB memory modules installed
in Socket 3 and Socket 4.
* You can use either standard memory modules or Extended Data
Out (EDO) modules. You may use both types, but you cannot
mix them in the same set. For example, if you install an EDO
SIMM in Socket 1, you must also use an EDO SIMM in Socket 2.
If you install EDO memory, you must use the SETUP Utility to configure
each set (Bank) of sockets. Socket 1 and Socket 2 are Bank 1. Socket
3 and Socket 4 are Bank 2.
Note: ┤Each Memory Module you install must have these │
│Specifications: 72-pin; 32-bit or 36-bit; 4 MB │
│8MB, 16MB or 32 MB; 70 nsec; gold contacts; DRAM │
Radio Shack Unlimited has the correct memory for your IBM Aptiva Computer.
Size In MB RSU Number
4MB 11504495
8MB 11496916
16MB 11504420
┌─────────────────────────┐
│Main Logic Board Layout: │
└─────────────────────────┘
┌────────────────────────────────────────────────────────────────────┐
│ ... ┌──────────────┐┌─┐┌─┐┌┐┌───────────┐ ┌────────┐ │
│ : : └──────────────┘└─┘└─┘└┘└───────────┘ └────────┘ │
│ : : ┌───────────┐ ┌────────────┐ │
B │ ... └───────────┘ │ │ │
a │ ┌───────────┐ ├ ┤ │
c │ └───────────┘ │ │ │
k │ └────────────┘ │
│ ┌────────────────────────────────────┐ │
o │ │ │ ┌─────────────────┐ │
f │ └────────────────────────────────────┘ └─────────────────┘ │
│ ┌─────────────────┐ │
C │ └─────────────────┘ │
o │ ┌┐ │
m │ └┘ │
p │ ┌───────────────────────┐ │
u │ ├────────Socket 1───────┤ │
t │ └────────Socket 2───────┘ │
e │ ┌───┬────┐ │
r │ └───┴────┘ │
│ ┌─────────────┐ ┌───────────────────────┐ │
│ └─────────────┘ ├────────Socket 3───────┤ │
│ └────────Socket 4───────┘ │
│ │
└────────────────────────────────────────────────────────────────────┘
SIMM TYPE TO FILL EACH BANK
┌───────────┬──────────────┬──────────────┬────────────┬──────┐
│Socket 1 │ Socket 2 │ Socket 3 │ Socket 4 │Total │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 4MB │ 4MB │ ---------- │ ---------- │ 8MB │
│ -------- ┤ ---------- │ 4MB │ 4MB ┤ 8MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 4MB ┤ 4MB │ 4MB │ 4MB ┤ 16MB │
│ 8MB │ 8MB │ ---------- │ ---------- │ 16MB │
│ -------- │ ---------- │ 8MB │ 8MB │ 16MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 4MB │ 4MB │ 8MB │ 8MB │ 24MB │
│ 8MB │ 8MB │ 4MB │ 4MB │ 24MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 8MB ┤ 8MB │ 8MB │ 8MB ┤ 32MB │
│ 16MB │ 16MB │ --------- │ --------- │ 32MB │
│ -------- │ ---------- │ 16MB │ 16MB │ 32MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 4MB │ 4MB │ 16MB │ 16MB │ 40MB │
│ 16MB │ 16MB │ 4MB │ 4MB │ 40MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 8MB ┤ 8MB │ 16MB ┼ 16MB ┤ 48MB │
│ 16MB │ 16MB │ 8MB │ 8MB │ 48MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 16MB │ 16MB │ 16MB │ 16MB │ 64MB │
│ 32MB │ 32MB │ ---------- │ --------- │ 64MB │
│ --------- │ ----------- │ 32MB │ 32MB │ 64MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 4MB │ 4MB │ 32MB │ 32MB │ 72MB │
│ 32MB │ 32MB │ 4MB │ 4MB │ 72MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 8MB │ 8MB │ 32MB │ 32MB │ 80MB │
│ 32MB │ 32MB │ 8MB │ 8MB │ 80MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 16MB │ 16MB │ 32MB │ 32MB │ 96MB │
│ 32MB │ 32MB │ 16MB │ 16MB │ 96MB │
├───────────┼──────────────┼──────────────┼────────────┼──────┤
│ 32MB │ 32MB │ 32MB │ 32MB │128MB │
└───────────┴──────────────┴──────────────┴────────────┴──────┘
┌──────────────────┐
│Installing SIMMs: │
└──────────────────┘
Note the following before installing SIMMs:
Install only one type of SIMM within a single bank.
Retain the antistatic packaging the SIMMs are shipped in, in case you
later remove SIMMs.
Before you begin, carefully read the following steps and the documentation
provided with the memory kit. To install SIMMs:
1. Turn off the computer, and disconnect all cables.
2. Discharge any accumulated static electricity from your body by touching
a grounded metal object. Then, open the computer.
3. Install each SIMM in the appropriate socket.
To install a SIMM in an empty socket, align the notch in the center of
the SIMM with the raised area in the center of the socket. Holding the
SIMM by the edges, tilt it to a 45-degree angle from the main logic
board. Make sure the connectors line up and the module is firmly
held at approximately a 45-degree angle.
4. Press the metal-edged connector into the socket, and firmly seat the
SIMM. Then, press the top edge of the SIMM toward the retaining clips
until the SIMM latches into place. Both sides of the module will
"click" when the module locks into place. The newly installed
memory module will be locked into the socket in a vertical position
with pins showing through the holes on each side.
5. Be sure the internal cables are securely connected and do not cause
mechanical interference. Then, close the computer.
6. Reconnect all cables.
7. Run the setup* utility to store the new memory value.
*If you install EDO memory, you must use the Setup Utility to configure
each bank of sockets.
┌────────────────┐
│Removing SIMMs: │
└────────────────┘
Before removing or rearranging SIMMs, be sure the new configuration is a
valid configuration.
To remove a SIMM, open the retaining clips by pushing downard on both
clips at the same time. The module will release and move forward. Lift
the SIMM away from the board. Store the SIMM in an antistatic package.
(CSC/all/BKL-04/01/96)