Build Your Own PC
Install MemoryMay 31, 1999
By David Risley
You should now install your memory modules, better known as SIMMs. You probably already took care of all this, but you need to make sure you have the right kind of memory for your motherboard.
Also, make sure the banks are full on your board. On a Pentium system, 72-pin SIMMs must be installed in pairs. DIMMs can be installed alone. On 486 class machines, 72-pin SIMMs can be installed alone while 30-pin SIMMs must be installed in groups of four.
Lets get on with it:
- Decide which slots you are going to use and orient the SIMM over it. The SIMM is keyed so that it will only go in the right way. Study the SIMM and you will see what I mean, and obviously, if it won't work, turn it around.
- Install the Module. With SIMMs, you need to stick it in at an angle, about 45 degrees. With DIMMs, they go straight in.
- Lock the module in place. Obviously, SIMMs don't sit in the motherboard at a 45 degree angle. Rotate it to the vertical position. This may require a bit of muscle, but do not force it. If it is too hard, it is probably installed backwards. When it is vertical, you should see the little plastic or metal clips snap into place, thereby holding the SIMM in place. With DIMMs, all you have to do it close the levers on either side of the DIMM. If they do not close, it is because the DIMM is not inserted all the way into the slot.
- Done. Now just repeat these steps for each of your memory modules. When you are done, double-check your work.
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