Help; G3258 + MSI H81M-P33 : Increasing CPU Ratio sends system into boot loop

willardthor

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Hi guys,

I needed a cheap-ish gaming PC, and when scouring the web for suggestions, I ended up settling for the G3258 with the intent of overclocking it. Here is my build:


  • motherboard:
    MSI H81M-P33
    processor:
    Intel Pentium G3258
    memory:
    Crucial Ballistix Sport series 8GB kit (2x4GB) DDR3-1600 CL9 @ 1.5V
    discrete graphics:
    XFX R9 270X 4GB
    power supply:
    Seasonic M12II 620 Bronze

I confirmed that this processor could be overclocked on this motherboard, and saw a kid on YouTube overclock his processor simply by increasing the "CPU Ratio" in the bios.

However, when I tried this, even if I set the "CPU Ratio" to just 33 instead of 32, the system went into a boot loop; the BIOS splash screen would appear, I would see the Windows 10 is booting "spinning wheel" for a split second, and then the computer would reboot.

I then tried a more elaborate approach by following the advice of MageTank in this post (without clearing the CMOS), and again, if I set the "CPU Ratio" any higher than 32, the system would enter a fruit loop.

I fear I have overlooked something very simple; can you guys help me find out what?

I have attached photos displaying my current "OC" settings in the BIOS. They confirm that I have the newest version of the BIOS, and that I indeed have the listed motherboard and processor.

While I have considerable experience and understanding with computers, I have never tried overclocking a computer before, and all the guides that I have found have either been "do this; don't ask questions" (which then doesn't generalize to a slightly different system), or fairly vague on the specifics on how exactly to configure the overclocking settings.

Any suggestions would be appreciated (and doubly so if a brief justification accompanies the suggestion).

Thanks in advance,
Willard.

P.S.: While observing the overclocking settings screen, I noticed that the VCCIN Voltage jumps between 1.792V and 1.808V. Is that significant?

P.P.S.: This is a "crosspost" from overclock.net ; I thought it made more sense to ask there topically, but the community doesn't seem very active there.

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willardthor

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Which voltage?

Please have a look at the images I attached. The voltages relating to the CPU are not set on auto.


Yes:

 

willardthor

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Wow, that was actually it; in case the messages at intel.com disappear, here's the essence of the fix:

I just renamed C:\Windows\System32\mcupdate_GenuineIntel.dll to C:\Windows\System32\mcupdate_GenuineIntel.dll.bak (and changed permissions to be able to do so- on this file only). And that's ALL I needed to do Win 10-side for my G3258 (aside obviously from setting OC again on all cores in BIOS).

What a hack. Windows hasn't changed at all these last few years has it.

Anyways,

So now I can increase the CPU Ratio; so far at 3.6GHz without breaking a sweat. Can any of you look at my settings and let me know if they are sane? (if some of the settings are dangerous, or if some of them can be improved?)
 
I have two G3258s of my own. hornirl, a member of this board, has been on top of this revolting development.

Have a look at what I have been doing for school Science Fair.

http://www.tomshardware.com/forum/id-2706290/g3258-memory-overclocking-project-reults.html
http://www.tomshardware.com/forum/id-2745440/g3258-4690k-memory-configuration-data-science-fair.html
http://www.tomshardware.com/forum/id-2719471/4690k-memory-overclocking-project-results.html
http://www.tomshardware.com/forum/id-2625445/build-log-consolidated-middle-school-builds.html

You should be able to get to 4.0Ghz easily at an override voltage of 1.200 V or less.

What testing/benchmarking software are you using?

 

willardthor

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Nice data! I'll definitely consult it when I start tweaking my overclocking settings some more.

So far, I haven't touched any settings for memory, and I haven't overclocked the graphics card yet (although I probably won't need to; the display is 1080p). I have set the CPU Ratio to 40 now, so my cores are at 4GHz.

I'm currently using Prime95 to burntest my processor, and FurMark to burntest my graphics card. I should be using other tools as well (I've been considering LinX, but I have to do more research to find which tools are ideal), but I got a little impatient, so I tried playing "Wolfenstein: The New Order" with High graphics for a few hours instead; I haven't had a single crash, and temperatures didn't creep above what my previous tests had indicated. Next I'll try dialing it up to Ultra graphics. You use PCMark; what is your impression of that tool? Do you use other tools?

Temperatures: The graphics card ran at a cool 60°C with the cooler that came with it. If I decide to overclock the graphics card, I will replace the cooler on it with the same cooler I have on my CPU: Cooler Master Hyper 212 EVO (I've always found cooling on graphics cards to be stupid, and this video convinced me that a bigger heatsink and smarter case design is the right way to go). The processor ran at less than 50°C before I overclocked it, and is now at 60°C after Prime95 has been running for about 15 minutes.

The computer is not in a case yet; I plan on building one out of 1/4 inch acrylic plastic sheets in the next few weeks.