| Q. | Installing and Removing Memory Module.
Replacing defective modules and upgrading to new modules
Things needed
- new memory modules
- screwdriver (pc case removal)
- pc user manual or guide
Tips on Memory Module Installatioon
1. ensure environment is static safe by removing any unwanted plastic, bags from your workbench. Keep the computer system plugged into your AC unit but ensure that the power switch on the PC is turned off. Keeping the PC plugged in the AC will ensure that case is grounded thus reducing the possibility of damaging the module or system from ESD (Electro Static Discharge)
2. After removing the casing cover, ground yourself by touching any of the metal surfaces on your computer casing. Doing this step discharges any static built up on your body and clothings
3. Visually locate the computer memory expansion slots. This is normal visible but if in doubt, refer to your operation manual instruction book.
4. Insert memory upgrade according to illustration in guide. Take note of
- modules keyed notches and match to socket
5. Replace case to complete installation.
Note: when restarting your computer, note any error messages that is being displayed and update your configuration setting accordingly.
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| Q. | I have just installed memory into my 486 and have a blank monitor or the system refuses to boot. What's wrong?
| Make sure you are not trying to install EDO memory into your system. EDO will not work in the 486 based computer. |
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| Q. | I just installed 16MB of memory in my 486. I turned on the computer and get a message: Invalid configuration/run setup. How do I fix this error?
| This is not an error. This is exactly what should happen when installing memory. Your system "sees" the new memory, but your BIOS does not. You must run the CMOS setup utility to allow the BIOS to 'write' the changes in extended memory to the CMOS setup. There are several ways to access your setup, but the normal method is to hit your F1 or F2 key when you first boot up. Some systems require Control+Alt+Esc, while others require the delete key to enter setup. Check your manual for the exact key strokes. |
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| Q. | My Pentium 100Mhz computer came with EDO memory. I installed two new EDO 60 nanosecond SIMMs and now my screen is blank when I boot the computer. Why?
| Generally speaking, EDO is for Pentiums 120Mhz and up. Most early Pentiums (60MHz -100MHz) prefer Fast Page Mode (non-EDO) memory. Some earlier Pentiums can use EDO, but it may require replacing the slower standard EDO memory, and changing your BIOS. This is not recommended for most users. |
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| Q. | I want to purchase Fast Page Mode memory for my 486 computer, but the retailer only has EDO and Parity memory. What do I purchase?
| EDO memory will not work in 486 computers. Parity memory, which is actually Fast Page Mode with 4 bits for parity checking, works in all computers. If your system does not use parity, it will ignore it. However, if your system does require parity, then you must use parity modules. Newer Pentium systems can be configured to use either parity or non-parity modules but need to have the BIOS set up accordingly. |
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| Q. | What is the difference between EDO memory and Fast Page Mode memory?
| EDO memory has a faster read timing than FPM but has the same write timing. FPM is commonly used in 386 and 486 computers, while EDO is for Pentiums only. Apple computers should be configured with Fast Page Mode memory. |
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| Q. | Will EDO modules work in my 486DX2-66?
| No. EDO memory is designed for Pentium style motherboards (64 bit) and will cause errors or no-boot if used in a 486 system. Install 72-pin non-EDO memory. |
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| Q. | How many modules do I need to upgrade my Pentium?
| Pentium motherboards require the installation of matching pairs when using 32 or 36 bit 72-pin memory. The motherboard is 64 bit and would necessitate the use of two 32 bit or two 36 bit modules to equal the 64 bit mainboard. |
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| Q. | I installed EDO memory in my Pentium system and am now encountering boot-up problems
| Try installing the EDO modules in the bank containing the OEM (original) factory SIMMs and moving the OEM SIMMs to another bank. Many times this will resolve the conflict. If this does not resolve your problem, you may need to exchange the EDO modules for Fast Page Mode (FPM) memory available at your place of purchase. Also remember, EDO memory does not work in 486-based systems. |
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| Q. | I own a Pentium 200MHz computer which has SDRAM memory. I have one memory slot available on the mainboard for upgrading. Do I have to remove the existing module and install in matching pairs to upgrade my memory?
| No. SDRAM or Synchronous DRAM systems utilize 64 bit, 168-pin DIMMs rather than 72-pin SIMMs. Leave your existing memory and install one additional module. (168-pin DIMM) Make sure the memory is SDRAM. |
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Memory Installation Support
