If you've suspected issues within your system and you cannot identify the culprit, memory is the best place to start. Memory can be tested through using Memtest86.
Download Memtestx86 here for your operating system. You are going to want to create a bootable disc/USB out of it. For making a bootable USB, follow this tutorial
Boot into the drive/disc you've just created.
There are four options but we are going to be using the first one, you could just not choose anything and it will automatically do into testing mode.
Memtest isn't a benchmark, it searches for failures and inconsistencies within the RAM. It is advised to let the test go for 8+ Hours. It is also recommended to test one stick of RAM at a time. Memtest will run forever unless you stop it.
From this point on, memtest should be up and running.
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