which software to check that new build is working properly and then OC

I need some recommendations to make sure my new rig is running properly, so I don't get BSODs.

I'm about to redo my rig almost completely. The Corsair 800D case, Corsair 850 W PSU, and Hitachi 7200 rpm HDDs remain, but the rest will be all new:

• ASUS ROG X570 Strix-E motherboard
• AMD 3900X CPU
• Crucial Ballistix Elite 3600 DDR4 2 x 16 GB
• AMD Radeon 5600-XT (haven't picked out vendor/model just yet)
• Sabrent 1 TB Rocket NMVe PCIe 4.0 M2 2280

Up to now, when I've had memory issues I've used memtest86. But I would like some recommendations for utilities to test out all the hardware. First I will run my system at rated speeds. After a few weeks of completely stable operation, I would like to overclock "reasonably." If it matters, for now I will stick with the AMD Wraith cooler for the 3900X.

In advance,

Thanks.

Try this:
CPU - Stress Test Using IntelBurnTest - Windows 7 Help Forums and also this:
Hardware - Stress Test With Prime95 - Windows 7 Help Forums

See how your system stacks up,

PassMark Software - PC Benchmark and Test Software

Performance Test 10.

Then hit the benchmark score site. Look at the charts for your individual components and see how each one stacks up. Improve each area one bit at a time. Start with the slowest first

PassMark Software - CPU Benchmark Charts

Good luck