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TITLE
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Article ID:
Created:
Modified:
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36392
12/3/97
3/31/00
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TOPIC
Power Computing provided the information in this article and it was deemed accurate as of 14 November 1997. Apple Computer, Inc. is not responsible for its content. This article is being provided as is and will not be updated in the future.
DISCUSSION
Remove the case according to the following Tech Info Library article:
Article 36388:
Removing the case
Installing the RAM
Once you have the case removed, plug in the system's power cord. The power cord will serve as a ground for the computer. If you have a grounding strap, clip it to the metal frame of the computer and put it on your wrist. If you do not have a grounding strap, make certain you touch the power supply located in the back right corner of the computer before you touch any cards inside the computer. If the RAM is correctly installed, you should not be able to see the metal contacts.
For tower units, be certain the system is lying on itÕs right side.
Power100/120
Note: SIMMs should be installed in like pairs. These pairs are organized into banks A, B, C, and the fixed main logic board bank. The main logic board bank is the farthest away from the drive bays and comes with two 4MB SIMMs, which are required for the system to work. Do not replace the SIMMs in the main logic board bank with SIMMs of any other capacity. That bank will only work with two 4MB chips.
SIMMs can be installed into the other banks in any order, but one pair must be installed per bank. Both slots must be filled with SIMMs of the same capacity.
First, unclip the SIMMs in the main bank (marked DO NOT REMOVE) and angle them to the left, but do not remove them. It's easiest to install RAM from left to right.
1. Hold the module by the ends with the contacts down and the notched end toward the back of the computer.
2. Slide the contacts into the slot at an angle and make sure the contacts are firmly seated in the slot.
3. Push the module toward the floppy drive side of the computer until it snaps into a vertical position. When pushing the cards into place, it's easiest to go from the rightmost card to the left.
PowerCurve/Center/Tower
Note 1: DIMMs and DIMM slots are slotted which prevents backward installation.
Note 2: DIMMs do not need to be installed in pairs. Furthermore, there is no benefit to installing DIMMs in pairs on this computer because this logic board does not take advantage of interleaved memory.
1. Locate the four DIMM slots; they are the only set of four slots on the logic board.
2. Push the white locking device down.
3. Insert the DIMM into one of the slots and press down firmly. The top edge of the DIMM should be flat with respect the main logic board. Verify that the DIMMs are installed properly by firmly pressing down on the DIMMs.
4. If the white locking lever does not come up automatically, pull it up into position level with the rest of the cards. If there is substantial resistance, the card is not seated correctly. Pull it out and push it back into the slot.
PowerWave
Note 1: The PowerWave has eight DIMM slots near the front on the main logic board. The DIMM slots are organized into two banks, A and B. Bank A is in the front and Bank B is behind it, as labeled on the main logic board. Each bank has four slots, numbered A1Ð A4 and B1Ð B4. DIMMs can be inserted in any order, but if you install DIMMs of the same capacity in slots with the same number (A1 and B1, etc.), you will get better performance than if you install DIMMs unpaired.
Note 2: DIMMs and DIMM slots are slotted which prevents backward installation.
1. Locate the eight DIMM slots in the front left corner of the logic board.
2. Push the white locking device down.
3. Insert the DIMM into one of the slots and press down firmly. The top edge of the DIMM should be flat with respect the main logic board. Verify that the DIMMs are installed properly by firmly pressing down on the DIMMs.
4. If the white locking lever does not come up automatically, pull it up into position level with the rest of the cards. If there is substantial resistance, the card is not seated correctly. Pull it out and push it back into the slot.
PowerTower Pro
Note 1: The DIMM slots are organized into two banks, A and B. Bank A is in the bottom and Bank B is above it, as labeled on the main logic board. Each bank has four slots, numbered A1Ð A4 and B1Ð B4. DIMMs can be inserted in any order, but if you install DIMMs of the same capacity in slots with the same number (A1 and B1, etc.), you will get better performance than if you install DIMMs unpaired.
Note 2: DIMMs and DIMM slots are slotted which prevents backward installation.
1. . The floppy drive cage needs to come out. On the front of the computer, on either side of the floppy drive, there is a screw. Remove those two screws and set them aside. The floppy drive cage will slide back, then lift out. Set that aside.
2. The eight slots below it are the RAM slots.
3. Lay the computer on its right side.
4. Push the white locking device down.
5. Insert the DIMM into one of the slots and press down firmly. The top edge of the DIMM should be flat with respect the main logic board. Verify that the DIMMs are installed properly by firmly pressing down on the DIMMs.
6. If the white locking lever does not come up automatically, pull it up into position level with the rest of the cards. If there is substantial resistance, the card is not seated correctly. Pull it out and push it back into the slot.
PowerBase
DIMMs and DIMM slots are slotted which prevents backward installation.
1. In the front, left corner of the logic board, you'll find three slots together. These are your RAM slots.
2. Push the white locking device down.
3. Insert the DIMM into one of the slots and press down firmly. The top edge of the DIMM should be flat with respect to the main logic board. Verify that the DIMMs are installed properly by firmly pressing down on the DIMMs.
4. If the white locking lever does not come up automatically, pull it up into position level with the rest of the cards. If there is substantial resistance, the card is not seated correctly. Pull it out and push it back into the slot.
Reassemble the computer per the following Tech Info Library article:
Article 36389:
Reassembling the case
Computers Affected: All
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