Forum Thread

Intel G3258 overclocking help

slickfatty 1,225 707 May 14, 2016 at 09:04 AM
I no longer tinker with my systems like I once did. Last box I tinkered with was a 3770K at 4.5GHz. Since then I haven't gone into it much. Good enough is good enough nowadays. With the Geforce 1070 coming soon, it seems I can game at 4K without major $$$, so I wanted to see if I can minimize the bottleneck from the CPU, without having to upgrade the CPU. I don't hangout in many of the more dedicated tech forums, so I'm seeking some help from some of you OC'ing/Slickdealing experts here worship

Box is a G3258 on MSI Z97 PC Mate ($99 combo from Microcenter couple years back), and currently a GTX960 hooked up to a 4K Sony TV. It's my HTPC and gaming box. Been running stock with absolutely no issues. I'm able to get it running at 4.2GHz at 1.2v, uncore at 3.8GHz on auto voltage. Temps are mid to high 60's on load on the stock Intel cooler. All is fine when running games and Prime95. The problem I'm running into is random lockup when running Media Center to watch TV. The screen would just completely blank out. It only happens when watching TV and videos. This is making no sense to me, that it runs fine running heavy loads, but not on light load. What am I missing? I do realize I probably will need to upgrade the CPU, but I wanna see how the G3258 will perform first.

TLDR: G3258 at 4.2GHz with 3.8GHz Uncore runs fine on heavy load, but random freezes (screen blanks out totally on random solid color) when watching videos. What could be the issue?

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#2
the issue is the overclock. stability is not a science. I recommend lowering your overclock or even reset your uncore because it has little, if any, effect on performance. but it often helps you be unstable.
bearing in mind I also don't remember what the stock uncore is.
if you can, increase voltage to attempt to bring stability, otherwise oc has to go lower.
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#3
Quote from SecretlyJesus View Post :
the issue is the overclock. stability is not a science. I recommend lowering your overclock or even reset your uncore because it has little, if any, effect on performance. but it often helps you be unstable.
bearing in mind I also don't remember what the stock uncore is.
if you can, increase voltage to attempt to bring stability, otherwise oc has to go lower.
I actually had it in the past with a very modest 3.5OC, and the same happened - rock solid when on a heavy load, but random blank screen lockup when on light load such as watching videos. The one thing I read was that the uncore should typically be 200-400mhz lower than th core. What isn't making sense to me is that it's stable on a load, but randomly locks up on light loads. Had it been the reverse, it'd be much easier to troubleshoot..

I'll tinker with it a bit more. Put uncore back to auto, raise voltage by 0.05, and start again at 3.5ghz. It's pretty time consuming as the blank screen lockup is not very frequent. What I do know is it only happens when on a light load, and never when benchmarking and gaming. I'll probably end up buying a 4690K when this tinkering is no longer fun laugh out loud
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#4
Quote from slickfatty View Post :
I actually had it in the past with a very modest 3.5OC, and the same happened - rock solid when on a heavy load, but random blank screen lockup when on light load such as watching videos. The one thing I read was that the uncore should typically be 200-400mhz lower than th core. What isn't making sense to me is that it's stable on a load, but randomly locks up on light loads. Had it been the reverse, it'd be much easier to troubleshoot..

I'll tinker with it a bit more. Put uncore back to auto, raise voltage by 0.05, and start again at 3.5ghz. It's pretty time consuming as the blank screen lockup is not very frequent. What I do know is it only happens when on a light load, and never when benchmarking and gaming. I'll probably end up buying a 4690K when this tinkering is no longer fun laugh out loud
Then you somehow managed to have it be unstable at 3.5 or you have faulty hardware X)
That has been a rule for awhile now but it was performance not for anything else. you can leave it at stock as it wont help you in any way.

whats your current voltage set at for the chip?
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#5
Quote from SecretlyJesus View Post :
Then you somehow managed to have it be unstable at 3.5 or you have faulty hardware X)
That has been a rule for awhile now but it was performance not for anything else. you can leave it at stock as it wont help you in any way.

whats your current voltage set at for the chip?
1.2v 4.2GHz. Running Prime95 and games it's perfectly stable. I could get it stable on load at 4.4GHz but needed to bump voltage to 1.3. Can't be faulty hardware. In every case, random lockup only occurs under light loads.

I tinkered with it a bit more and it hasn't locked up all night last night watching videos. I do agree that even with a 1GHz overclock, it's not going to help that much on CPU-bound titles. I've seen comparison on G3258 vs 4690K, on some titles the i5 literally doubles the frame rate of the G3258. Will just go ahead and upgrade to a 4690K when I get my hands on a GTX1070. Had a bit of fun tinkering with it.
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#6
I recently moved up from nearly the exact build. My MB was crappier though. Started with an R7 260x and went to the 960GTX and found little to no improvement. Moving up from that cpu to an i5 4670 was a massive change. Even running a 4.5 OC that CPU is terribly bottlenecked in real world applications and is not doing that card justice.

Games went from unplayable to suddenly max settings. That CPU was fun for a couple of years on my cheap build, but was not nearly as good as the numbers would have you believing.

As for your issue, your CPU is unstable. Could be you need to bump that voltage or you simply lost in the lottery there. I had one sent to me that was completely unstable at stock settings and had to be returned. Next one went to 4.5 with just over 1.2 volts and never even got near 60C.

Kill your overclock and see if you have the issue. Then slowly add it back and bump the voltage (to safe levels) until you get stability. Stay off the auto settings. It may be interesting to kill stepping as well to see if that does anything for your stability. Could be your states are not switching properly.
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Last edited by Pedantyc May 16, 2016 at 05:03 PM
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#7
Which version of Prime95 did you use? The older versions (prior to 28.5) did not use the AVX extensions. Therefore you may have been "Prime stable" but not for some applications that use those extensions.
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