Asrock B85 Anniversary BIOS issues |
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parsec
Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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My experience with G3258s is different than yours, but the last one I bought is about six months old now.
The first one I have starts to hit its wall at 4.0GHz. Above that it needs over 1.3V to boot and be stable at 4.1 - 4.2GHz. 4.5GHz is virtually impossible, it would need 1.4V+ to boot. So I gave up on that one. The second one I bought, months later, is much better. It will do 4.5GHz at 1.2V and is stable and works great. One thing I "discovered", although it really is obvious and nothing new, is this. Running at stock speed, 3.2GHz, I kept reducing the CPU voltage until the PC would not boot. Then I would go back to the last Vcore that booted, and checked it for stability. If it was stable, or needed a bit more, I would adjust it and the result was the lowest Vcore needed for stock clocks with that processor. My second G3258 at stock speed is stable at 0.83V! I doubt I will ever forget that Vcore! My first G3258 needs a Vcore of ~1.0V at stock speed to be stable. While I can't say that Vcore scaling vs speed is a straight line, how obvious is it which one will be better to OC? The actual results after over clocking both speak for themselves. IMO, using this method to check a CPU for its OC potential is pretty good. Of course, using this method is a sure way to either disappoint you, or admire what is possible with the silicon lottery. |
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Xaltar
Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 22688 |
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I can do 4.3ghz @1.28v with the igp disabled and 1.32v with it enabled so the igp plays a role too. Unfortunately my CPU just won't do anything past 4.5 at anything even close to resembling acceptable voltage. 4.5 I can do at about 1.48v which pushes my system past thermal limits under IBT and bsods. If I use X264 stress test I can pass at 4.5 at that vcore but I use 4.5 only for benchmark runs and run at 4.3 full time.
I can post at 4.6 all the way to 5.0 with 1.5v but I get instant BSOD as soon as windows tries to boot and I can't push the voltage any more than that on this board because the input voltage does not scale up enough with its auto setting. I really wanted to get a validation at 5ghz with this cpu but alas the lottery was not in my favor. I guess my CPU is in the lower segment of acceptable lottery wise, I can get it stable at 4.5 I just don't like the voltage I have to pump into it for it to work. It was a transitional purchase anyway just so I could play with OCing it
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