I just got 2 sticks of RAM 16GB each but, my computer will only ...
While you can get larger RAM capacities by going for motherboards with eight RAM slots or more, these are typically server- or commercial-grade motherboards and require specialized RAM sticks.
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Motherboards also have a maximum amount of RAM they can support and a specific number of slots. If your slots are fully utilized, consider augmenting the memory capacity or upgrading to a new system.
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However there are plenty of mATX motherboards with 4 RAM slots, and in terms of expansion slots, for most builds you wouldn't need them anyway as most gaming ...
16GB RAM Installed Only 8GB Usable in Windows 11
Be sure to also check your motherboard’s manual for information on how to correctly install the RAM on the DIMM slots. Different motherboards may have varying rules and limitations about RAM installation.