[opan]

Failing RAM is rarer than it seems from posts online. My theory is that it's so easy to test for that everyone says to do it even if it's unlikely to be your problem. It reminds me of people who needlessly recap (replace capacitors) everything in hopes of it fixing a problem, often not even bothering to test each cap or exhausting other options first. IME dirt/corrosion/oxidation (often solved by cleaning) is a much more prevalent problem than bad caps. After that, solder that needs reflowing is still a more common issue than bad caps.

That being said, I really did have one bad stick of RAM once in my life, and it really does cause strange seemingly random problems.