A memory slot, memory socket, or RAM slot allows RAM (computer memory) to be inserted into the computer. Most motherboards have two to four memory slots, which determine the type of RAM used with the computer. The most common RAM types are SDRAM and DDR for desktop computers and SODIMM for laptop computers, each having various types and speeds. The picture below is an example of what memory slots may look like inside a desktop computer. In this picture, there are three open and available slots for three memory sticks.
When buying a new computer or motherboard, pay close attention to the types of RAM the memory slots can accept. Make sure you know exactly the type of RAM to buy for your computer. It is also important to note how many available memory slots are available in your computer. It is not uncommon for computers to have all memory slots occupied. If all slots are full and you want to upgrade the computer memory, you need to remove some or all of the existing memory.
Why are the memory slots different colors?
Empty RAM slots Open the Task Manager and go to the Performance tab. Select ‘Memory’ and under the memory graph, look for the Slots used field. It will tell you how many of the total slots are currently in use. In the screenshot below, the system has a total of 2 slots, and one of them is in use. Yes it is possible to clean RAM slots. To clear of debris use canned air as previously mentioned. Before doing any of the following, unplug it, press the power button for 30 seconds and let it sit for an hour or more for the capacitors to dissipate their charge. Remove all the RAM sticks on your motherboard Test 1 RAM in a single GREEN slot at a time (look for the markings DIMMA1, DIMMB1, DIMMD1, DIMMC1) then repeat with other sticks in the same slot. If no errors are present it may point to a motherboard slot issue. Insert the RAM into the RAM slot. Line up the notch in the stick of RAM to the break in the slot. Set the stick into the slot and then apply equal pressure onto the stick until the clamps on the side click and lock the RAM in. You may have to apply a fair amount of pressure, but never force it in.
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When a motherboard has different colored memory slots, it indicates the memory slots are dual-channel, and pairs of memory should be installed on the same channel (color). For example, a motherboard could have two yellow and two black memory slots. The yellow memory slots could indicate Channel A and Channel B could be indicated by the black slots. If you were only installing two memory sticks, you'd want to install both of them in Channel A (yellow slots) for optimal performance.
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