I did run blend for over an hour and had no issues passed just fine, honestly I was surprised my self how little voltage it required considering my previous R7 1700 non x required 1.45v to run at 4ghz.I game daily I play a lot honestly I've had it at this voltage for a month or more now, playing 6+ hours daily, mostly csgo pubg and some fortnite at 240hz
My point is not that Blend is a good stability test if you already know your RAM is good. My point is that in your hour of Blend, you're not getting as much of the core stress as you can. The great thing about P95 is that there's no ramp up and down in load and temperature like most other stress tests (OCCT, IBT), if you run on the smaller tests, your CPU doesn't get a break, which is good for evaluating actual load Vcore and temps.
Even on manual settings, droop can mess with stability.
As far as I can tell, stability is far from a black and white concept on Ryzen 3000. The first signs for me are WHEA errors logging in HWInfo, usually a single one. Without other symptoms, most people would probably ignore it, but the fact that a perfectly stable setup never results in any WHEA errors says everything.
With more instability, they start to add up. Then P95 individual worker threads start stopping. Then OCCT crashes or refuses to run. Then Windows starts artifacting. Finally, with hilariously low Vcore, only then do the BSODs begin.
None of those games really require any CPU power at all. Single threaded or low multi stress (like some more intensive games) seem to be good at evaluating boost Vcore offset stability, but do nothing for testing a manual OC.
By the way, I'm not casting doubt on your experience. You do have a great chip.
My 3600 requires 1.45V to run at 4.2 GHz, otherwise I get encoding errors in Realbench.
Damn. And here I thought that mine was a mediocre bin.