Been having some PC trouble and just going through the motions, documenting any suspicious behavior. I want to know if this is typical and/or a non issue? I've ran the CPU Diagnostic tool looping for hours upon hours lately, and occasionally the screen will blink out (I'm not running IGFX, but off a GTX970) go black with mouse cursor visible and responsive, then everything will come back. This is during the CPU Load test. PC function appears uncompromised following this issue.
The 6600k Passes the test, and in the cumulative 20+ Hours I've looped the test, it has not failed in any documented fashion save this one, perhaps benign anomaly. My current suspicion is a RAM problem, but I don't know if RAM would induce this kind of effect, or if this is just a quirk of the test, or maybe some latent issue I don't know about.
I have overclocked the processor in the past via unlocked multiplier and uncore. 44 Core Mult with 42 Uncore it ran with perfect stability at a peak of 1.224V with temperatures well below anything that could even be considered dangerous, even in the scorching California summer. I returned everything to stock via CMOS reset as part of ongoing diagnostic process. No change in presenting symptoms.
Tangentially related, only included If it would help at all: my issue that has prompted my diagnostic steps is an intermittent stuttering-freezing effect on my PC. Similar to what one might expect if they had a hardware bottleneck and were waiting for a resolution of something like a pagefault. The system doesn't crash (Though it has frozen and crashed in the past, it is not a common occurrence) and operates at a tolerable level for basic function, but an intolerable level for things like gaming. This problem doesn't happen super often. Maybe for a couple hours per day, usually after the PC has been on for 1+ Hour, and it sometimes, perhaps most of the time, resolves itself in an hour or two. Yes, my initial suspect was a driver, or some software issue, but programs like LatencyMon, as well as a reformat and driver update has never addressed the issue. This problem started happening early march, shortly after a RAM upgrade (the suspect RAM has been removed, stability did improve, but the issue still creeps up occasionally) If I had to guess, I was shipped the wrong RAM kit, and I loaded the XMP profile for 2400mhz for a 2133mhz and after a few weeks of running, suffered RAM damage or motherboard damage, but we all know the only way to be sure is trial-and-error. ( have a brand-new kit otw) The 6600k's IMC passes testing, as my biggest worry was a poor voltage setting could have cooked it.
Additionally, I am curious if there's any kind of CPU Failures the Intel Processor Diagnostic WOULD NOT find, or if my CPU passes the Diagnostic, I can rest easy knowing it's at least not the processor. (Which I voided the warranty on by overclocking lol)
I ask because I know Memtest and Window's Memory Test are highly imperfect diagnostic tools. If they catch something, you can be sure you have a problem, but if they pass, you can't rule out a memory problem. I hope Intel's CPU diagnostic doesn't share this exception.