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3570k possibly odd behavior?

post #1 of 5
Thread Starter 
Recently upgraded my system to a 3570k and ud3h taking advantage of the awesome MC deal. Couple of questions I have though.

I am running at stock and tested using OCCT for an hour with 1 min idle at start and 5 min at finish. The generated graphs show some possibly weird behavior. The bus speed seemed pretty stable but randomly jumped from 100 to 590 MHZ at one point. It also seemed to fluctuate a good +/- 25MHz when I was on chrome during the run. Is this okay and can these reading truly be trusted?

All cores basically stayed under 50 C during the entire run.

My core voltage would fluctuate from 1.164 to 1.1152 V throughout the duration of the load.

Also, my VTT voltage would go from 1.068 V to 1.056 V throughout the run.

At idle, I had to disable high performance in power options to get the cpu to downclock properly. For the most part, the voltage will hover around 1.0 V fluctuating +/- 0.3 V or so. However, occasionally, it will spike to 1.164 V or even slightly higher to 1.172 V. Is this normal?

Is any of this behavior out of the ordinary? Trying to make sure the system behaves normally before overclocking at all. I was getting a few BSODs that I got some help diagnosing on sevenforums, and it was mentioned that my cpu was producing a lot of errors possibly indicative of overheating. However, BSODs only occurred when I would leave my computer to idle while I ate or w/e.

Additionally, the first time I ran OCCT, I made the mistake of going on chrome and opening 15 tabs at once which froze the system. I assume that is normal.

Thanks.
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post #2 of 5

I don't know, but I can tell you that the voltage fluctuations are normal.  CPUs in general are not "stable" at all in terms of things like the voltage, clock speed, and multiplier.  If were to have something monitoring these things with an update interval of like 100 times per second, then I think all of us would probably freak out by all the constant fluctuations going on.  So the only reason why they can sometimes appear to be "stable" in this sense of the word is the monitoring software just isn't capable of showing all of the fluctuations.

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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #3 of 5
The bus speed thing with OCCT is almost certainly just a reporting glitch, so I wouldn't worry about that.

What TwoCables said on the voltage piece. There are always background processes putting smallloads on the CPU which drive constant frequency and voltage changes.

Are you still getting BSODs and problems with the system - it's not quite clear from your post. If so, you should try to get that resolved before you try verclocking the CPU, as otherwise you'll have trouble determining stability. If you are getting crashes at stock CPU settings, you may be having problems with the memory, and you might want to do some memory testing to eliminate that possibility. I guess Memtest is still the go-to memory testing program, old as it is.

I'm not sure about OCCT, most people use IBT or Prime95 and I haven't messed with it extensively myself, but I wouldn't expect your system to lock up just because you were running that and Chrome. It would be slow to respond since OCCT is taking CPU priority, but it shouldn't completely lock up.
post #4 of 5
Thread Starter 
I figured a level of fluctuation is to be expected, just wanted to make sure that those amount of fluctuation would be acceptable.

As for BSODs, I believe the problem is resolved. Haven't had one in a week or so. I believe it may have been my memory card reader that I didn't install a proper drive for. Unfortunately, I guess that part is simply a wait and see issue.

As for opening of multiple tabs, doing that without stress testing applies a full load to all cores. I assume that in addition to the unrealistic full load applied by OCCT, that would lead to a lock up. I guess it could have been the system very slow to respond as I was able to move the mouse about the desktop, but after 30 seconds of no response from chrome or OCCT, I manually shut it down.

Finally, I have done some prime95 testing for only an hour without a problem. Plan to test overnight though to ensure no problems. OCCT passed with no errors when not trying to open 15 tabs at once. I also ran memtest for 12 hours without an error.

One problem I was unable to address was after booting memtest by changing my boot order for the dvd drive as first, I was unable to subsequently load windows from my ssd. I would simply get a reboot and select proper boot device or insert boot media prompt. I obviously switched boot order back to my ssd as first, but that did nothing. Unplugging all but my ssd also proved futile. Finally, switching to my backup bios, I was able to get it working. I then switched back to my main bios and cleared cmos and then I could load windows once more. Problem happened twice as I have run memtest twice. Any ideas on this one?
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Dump on my chest
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CPUMotherboardGraphicsRAM
Intel i7 6700K MSI Z170A Gaming M5 EVGA GTX 1070 Hybrid ADATA XPG Z1 2 x 8GB DDR4 2400 
Hard DriveHard DriveCoolingOS
Samsung 960 EVO 500GB Toshiba P300 3TB Corsair H100i V2 Windows 10 
MonitorKeyboardPowerCase
Samsung S34E790C Corsair K70 Season X-650 In Win 303 
MouseAudio
Logitech G402 Audioengine A2 
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post #5 of 5
No idea on the boot order thing - I'd guess it's just a glitch in the UEFI programming where it is stuck with the DVD as first boot for some reason, but I've never heard of that before. You might try saving the working settings to a profile, then if it happens again you should be able to clear the CMOS (or not) and then reload the profile - at leas that would save you remaking all the changes from the defaults.
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