Why are we putting RAM sticks into 2nd and 4th slot first?
For example, using 4 RAM sticks can improve performance by up to 5–7% compared to 2 RAM sticks. ... A common misconception about RAM is that you can put any RAM in any slot.
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Where you put your RAM sticks in a motherboard is known as DIMM (dual in-line memory module) slots. You might also know it to be ‘RAM slots.’ The more slots your motherboard has, the more RAM you can install.
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When your motherboard can support 16 GB of RAM with four slots, it’s best to install 8 GB sticks rather than four 4 GB sticks.
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If your motherboard has, for example, 4 or 8 open RAM slots, and you only have two sticks, there is only one specific combination you are supposed to use to plug your RAM sticks into the slots.