- Apr 20, 2015
most people don't overclock so a CPU getting close to its limit at stock is actually a good thing. I still wouldn't call that 1.365 a middling all core voltage. when you are at stock it's checking the current,power and temp limits constantly and adjustingvoltage and clocks many times a second based on its boost table. with an all core overclock you are turning all that off and the letting the sustained current hit higher levels than it would otherwise.Mine just "puked" a moment ago. Monitor suddenly goes blank, in the middle of scrolling, USB wired keyboard and mouse lights go off, cannot even use hardware RESET button, have to force power-off. Power-on, all is fine and dandy again.
I am using 3600 RAM, and had my FCLK set to 1800 to match, so there's that, and of course, the fixed 4000Mhz OC, using a middling voltage that stock uses too, so I don't really see the problem with that.
Are we as end-users expecting too much? Spoiled by Intel platforms, where the "max turbo" is generally easily achievable as an all-core speed, with the right motherboard (Z390, or other overclocking-capable chipset), and sufficient cooling (which, with certain Intel CPUs, meant de-lidding as well).
As opposed to AMD's Zen2 platform, where "max boost" is rarely, if ever, achievable in the Real World, and heaven help you if you want a true all-core OC, running AVX2 loads. Time to underclock, to prevent screen black-outs.
Anyways, I'm back down to stock settings, except for setting XMP (DDR4-3600), not going to even adjust FCLK (defaults to 1600, so mis-matched with DRAM right now). I want to see if I get "black outs" with these settings. If I do, I might ring AMD for an RMA. Or try my luck with a 3700X next month instead.
Edit: This is all under 240mm AIO WC, and I've had the A/C going (recently cleaned my A/C, so it's actually nice and chilly in here now).
Edit: Running 12 threads of PrimeGrid PPS LLR, at "stock" CPU settings, HWMonitor is reporting my Vcore at 1.384-1.395. That's at stock. CPU speed is roughly 3.917Ghz. So not too far off from my fixed manual 4.000Ghz 1.365V manual OC. If anything, I wasn't giving it quite enough voltage, and that's why I got the blank-screen / "puke" symptoms twice thus far.