How to diagnose intermittent BSODs with varying stop codes on a custom PC?

[Stephen77]

I've been getting frequent BSODs on my custom-built gaming PC, usually with different stop codes like IRQL_NOT_LESS_OR_EQUAL and MEMORY_MANAGEMENT, making it hard to pinpoint a single cause. The crashes seem random, happening during gaming, light browsing, or even at idle, and I've already run the Windows Memory Diagnostic tool, which found no errors. For those who have troubleshooted similar intermittent BSODs, what was your systematic process for isolating the faulty component, and did you find software like WhoCrashed or detailed driver verifier logs more useful than hardware stress tests in identifying the root cause?