I am having having issues overclocking with a Gigabyte Z97X UD5H and 4790k...

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beekermartin

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I left everything in the bios at auto except for the ram. I selected XMP profile 1 and then changed the voltage to 1.6 because that is what G.SKILL recommends for Haswell. I ran IBT and it passed with all cores boosting to 4.4 and vcore hitting @1.26. I then tried to find the lowest vcore it would run at stock settings and I found that to be 1.1 volts. It passed 10 runs of IBT and 1 run of 3dmark11 demo at 1.1 vcore.

I then tried to overclock. I figured I would start high at 4.8 ghz with the vcore set to 1.30. It booted but hard reset while running IBT. I then tried it at 4.7, 4.6, 4.5 and even 4.4. Every speed would hard reset while running IBT.

I must be missing something since it runs at 4.4 at stock settings. Why would it not run at that speed when I manually select 4.4? Especially with much more voltage than I know it can run at?
 
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synphul

synphul

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I had issues with xmp as well (not on that particular ram). I have the same board paired with a 4690k i5 and just by bumping the multiplier to 42 manually (no 'performance' presets) easily got it to 4.2ghz. That's without adjust voltages and things. It's harder leaping in and going backwards than starting smaller and increasing things. You shouldn't have to adjust the voltage unless while slowly increasing the overclock it becomes unstable. Then raising the voltage a little bit (from say 1.2 to 1.22 or 1.24 as an example) to reach stability.

From my experience, the cpu's overclock easier than memory, fiddling with memory overclocks and xmp's it seems to get kind of flaky and will more likely cause random problems.

You don't want to run more voltage just for the sake of it, the idea once you achieve an overclock on the cpu is to reduce voltage until you reach instability then raise it just a tiny bit so you're running stable at the lowest voltage you can. I'd try overclocking one thing at a time starting with the cpu, then once it's stable, move to the ram. Overclocking everything in all different directions at once can make it difficult to locate the culprit of instability.
 
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beekermartin

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I have been overclocking for years. I know there are many different ways to do it. I already found that my CPU will run at stock settings, boosting to 4.4 on all cores, as low as 1.1 vcore. That is with the ram set to 2133mhz. Which means selecting a higher safe voltage that I know my cooler can handle and trying to raise the cpu to a fairly common overclock is one way to do it. The fact that I couldn't even get 4.4 to work means I am doing something wrong.

What I don't understand is why when I selected the cpu multiplier manually to as low as 4.4, which it was stable at stock settings, it still hard reset.

Which means I am doing something wrong. Should I be changing the multiplier or the turbo multiplier? I had changed the multiplier and turned turbo off thinking that the chip would then only run as high as the multiplier selected.



 
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synphul

synphul

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I turned up the regular chip multiplier, not the turbo multiplier. After a failed attempt with xmp (the system I was attempting was using mixed ram of different speeds etc) I disabled xmp and set it to performance (stability). Didn't mess with anything else and it will drop all the way down to 800mhz when idling at around 1.0 or just under voltage, ramps up to around 1.28v when maxed out 100%.
 
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beekermartin

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I tried everything I can think of. I set the timings manually and disabled XMP. It still won't overclock at all. I tried leaving all voltages set to auto and only raised the multiplier to 46 and again it hard resets while running IBT. With the voltages set to auto it set the vcore to over 1.35 volts with a 46 multi! That is way too much voltage for 4600 mhz!

I don't know what I am missing but I am missing something. I am using the most current bios revision, F8.

It doesn't make any sense that I can run at 1.1 vcore and have all cores boost to 4.4 but if I set the multiplier manually it crashes even as low as 4.4.

Hopefully someone else with experience overclocking this board will help out.
 
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beekermartin

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The Z97X UD5H has two different bios. I am going to try the second bios and try to update the original bios. Even knowing it is the most recent bios maybe it is corrupted or something. There are some strange things happening. Like now the memory speed isn't showing in Gigabyte's hardware monitor. I reset the bios to original defaults and it still isn't showing in hardware monitor. It was showing before I played around with disabling XMP. I can see the memory speed in HWinfo monitor and CPUID but not in Gigabytes hardware monitor. Very strange. If installing the bios again doesn't fix the issues I am having I will contact Gigabyte directly.

There is no way my CPU can't be overclocked at all considering it is stable at 1.1 volts with all 4 cores boosting to 4.4ghz!
 
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beekermartin

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I downloaded and flashed the bios just to make sure it wasn't corrupted. I set everything back to what I had previously and it is still stable at stock cpu settings boosting to 4.4ghz on all 4 cores at 1.1 vcore. I then tried to set the cpu multiplier to 45 and the vcore to 1.25 and again it hard resets @20 seconds after starting IBT.

I don't know what I'm missing but there is no way a 4790k that can handle 4.4ghz on all cores at only 1.1 vcore can't be overclocked at all. What the hell am I missing???

 
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beekermartin

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I did manually set the voltage. I tried 1.25 and 1.30. It was boosting to high when set to auto when I raised the multiplier higher than 44.

What doesn't make any sense is that with everything set to auto except the vcore at 1.1 it is stable with all cores boosting to 4.4 while running IBT. If I manually set the multiplier to 44 it hard resets no matter what voltage I try.

Which means there is something strange going on.
 
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synphul

synphul

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I agree, it does seem a bit odd. I wish I knew for sure, far as I know the i7's and i5's are similar. While messing around with my 4690k I pushed the multiplier to 46 for 4.6ghz oc and when I entered too low of a vcore voltage (around 1.23 I think) it failed to boot. At 1.24-1.25 it crashed partway through prime95. Got it stable at 1.28 manual (the bios must have adjusted it slightly, possibly with vrin) to 1.2856v. I didn't try running ibt.

On the ud5h, the only things I adjusted - set vcore to 1.28v, set multiplier to 46, turned off integrated graphics and selected xmp for my ram, turned off power management for c6/c7 sleep states since my psu is older (set those states to 'disabled'). Everything else is on auto including uncore and vrin. Trying to think if anything should be that significantly different for the i7 over the i5. They're essentially the same with the addition of hyperthreading on the i7 but I wouldn't think it'd cause that big of a problem.

I don't think you mentioned what cooler you're using for your cpu. Are you using the stock cooler or?
 
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beekermartin

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I talked with Gigabyte and all they said was don't use XMP for the ram while overclocking. So I set the ram back to stock, 1600 mhz with very slow timings, and I tried manually setting the multiplier to 45. With the Vcore set to auto it was hitting 1.40+ voltage! Even with the voltage that high it still hard reset while running IBT. I then tried manually setting the vcore to 1.35, 1.30, and 1.25. All of them hard reset at the exact same point, @20 seconds in to starting IBT. I then lowered the multiplier to 44 and tried again. This time it passed with the vcore hitting @1.25. I lowered the vcore to 1.1 and tried again. It passed 10 runs of IBT again.

So either I am missing something or I have the worst overclocking 4790k ever. I feel I am missing something. How can it run at 4.4 with only 1.1 vcore with the ram running at 2133mhz when I select XMP and leave everything else at stock but not even run at 4.5 with 1.40 vcore with the ram running at 1600 mhz???
 
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