i5 8600K Stable 4.8Ghz Overclocking Settings For Gigabyte MB

Oct 19, 2018
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Hello,
I want to achieve 4.8Ghz Stable on my system. I had tests to 5.0Ghz and it was running and passing 3Dmark Bench but never passed a Prime95 for some reason. I saw some videos in internet for overclocking i5 8600k but non of them are for Gigabyte Motherboard. Can u tell ur settings or settings (Vcore, Base Clock, BLCK Frequency, LLC, DRAM Voltage i etc.) that will mach 4.8Ghz Stable Overclock. I know every system is different but anyway. Its really confusing when u watch someone with different motherboard from yours tryin to explain u how to OC and show u settings that u don't even have in ur MB.

My try with 5Ghz:

Base Clock - 100Mhz
Ratio - 50
AVX Offset - 0
Uncore Ratio - 45
LLC - Turbo
VCore Voltage - 1.290
(Disabled: Intel turbo boost Technology, VT-D and Intel Graphics too)

My Specs:

CPU - i5 8600k
Cooler - Noctua NH-U14S
GPU - GTX 1080 TI Aorus Non Extreme Version
MB - Gigabyte Aorus Gaming K3
RAM - HyperX Predator 3000Mhz 2x8 GB (16GB)
PSU - Seasonic Gold 80 Plus 850W

Many Thanks for Everyone who dares to Help me out!
I Appriciate it!
 
Solution
First of all, before going further, let's clarify what you MEAN by didn't pass Prime95.

What VERSION of Prime95 did you run?

Which TEST in Prime95 did you run?

Were you testing for thermal compliance, or stability, because they are totally and completely different things.

When testing for thermal compliance, which should be done FIRST, you should run Prime95 VERSION 26.6, and ONLY version 26.6. You should choose the SMALL FFT option and run that for 15 minutes. If that passes, and by PASSES I mean remains below 80°C, THEN you can move on to testing stability. If it does not pass you need to do one of three things.

Improve cooling.
Reduce voltage.
Reduce frequency.

AFTER you can pass the thermal compliance test at a given...
First of all, before going further, let's clarify what you MEAN by didn't pass Prime95.

What VERSION of Prime95 did you run?

Which TEST in Prime95 did you run?

Were you testing for thermal compliance, or stability, because they are totally and completely different things.

When testing for thermal compliance, which should be done FIRST, you should run Prime95 VERSION 26.6, and ONLY version 26.6. You should choose the SMALL FFT option and run that for 15 minutes. If that passes, and by PASSES I mean remains below 80°C, THEN you can move on to testing stability. If it does not pass you need to do one of three things.

Improve cooling.
Reduce voltage.
Reduce frequency.

AFTER you can pass the thermal compliance test at a given configuration, THEN you can test for stability. And this is CRITICAL. Do not cut corners. Do not take shortcuts. Do not assume that 4 hours is just as good as 8 hours, because it's not. Do not assume that just because you only use the system for gaming it doesn't matter whether it's almost totally stable or not (Few systems are 100% stable under ALL conditions, unless they have been downclocked at the stock voltage or had voltage increased at the stock speed. Scientific machines for example might REALLY need to be 100% stable under every conceivable circumstance), so I say ALMOST totally stable, because we're only going to test for 8 hours.

Run Realbench for 8 hours. Download and install Realbench. Open it. Click the stress test button. Select 8GB of RAM. You CAN select all 16GB, but since you are not specifically trying to test memory right now, 8GB is fine. If you fiddle with the memory configuration later, you will want to run it again for another 8 hours and choose the full amount of your installed memory.

If you pass 8 hours, you can assume for our purposes it is stable.

Also, reading this entire tutorial intended for those starting out with overclocking, but including some moderately important concepts regarding the process, would probably be a good idea.

http://www.tomshardware.com/faq/id-3761568/cpu-overclocking-guide-tutorial-beginners-work-progress.html

If you are just starting out the only things you need to be worried about initially are the CPU frequency and the CPU core voltage. This is likely going to be helpful too.

https://www.tweaktown.com/guides/8481/coffee-lake-overclocking-guide/index.html
 
Solution
Oct 19, 2018
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https://imgur.com/a/PF4pYlw

This is 30 Mins Test 4.8 Ghz, VCore 1.3V, LLC Auto, AVX Offset - 0, Disabled Turbo mode. Temps i tihnk are good 73'C Degrees Max. I read the both articles fully and it helped me alot to understand some things that i didn't know. I think i have even more Overclock Headroom. What u Think?
 
So, that passes the thermal test, but now you need to test that configuration using Realbench for 8 hours. If it fails, you'll need to increase voltage and try again. If you have to increase voltage, you MUST test again using Prime95 version 26.6 Small FFT for another 15 minutes to make sure it is still below 80°C and then retest using Realbench.

No, I doubt you have any additional headroom because I seriousy doubt you will pass Realbench at 1.3v with an LLC of 0. More likely, to pass and be stable, you are probably going to end up closer to 1.35v with an LLC of 3 or 4, and that is going to shoot thermals up tremendously. You may even need to reduce your overclock to 4.7Ghz, maybe less, depends on how good the chip is. Do the test. Don't guess. Don't cut corners. Otherwise, you'll end up with a system that you think is stable, but is not, and it will create micro errors you aren't even aware of until it's too late and most your data is corrupted.

Read this thread from my post down to the last post.

http://www.tomshardware.com/forum/252077-29-long-prime95#14073523
 
Oct 19, 2018
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I will try this, i hope it will pass the test, the only thing i didn't understand is should i increase the DRAM Voltage and How much? Actually i already increase the DRAM Voltage from 1.200 to 1.250V. Now my Other Settings are VCore 1.355v , 4.8 GHz, LLC Still Auto, AVX Offset 0, Max temp 76 for 40 minutes of Prime95. With previous Settings i turned on RealBench only for 15 Mins, and it passed the test i should left it at the night for 8 Hours, When i sleep. What will happen if the test did not pass? How could i understand.?
 
Oct 19, 2018
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Its in XMP Profile 1 3000Mhz i just increased the voltage.
I Mean not what to do if it doesn't pass. I Mean how i will understand if its not Passed the test the PC will restart or?

 
Usually, running Realbench, you will see that the CPU usage has dropped to zero. If it passes, it will say so. You can set the amount of time and the amount of memory. I would set half your amount of RAM in the memory setting.

I would remove the XMP profile setting of the memory and set the memory to it's default settings. Auto memory settings or reset the CMOS and then reenter your CPU configuration. You want the memory at it's default, basic setting while testing the CPU overclock. AFTER the CPU overclock has been tested and validated as STABLE, THEN you can start messing with the memory.

Otherwise, memory issues could cause you to falsely fail the stress test. CPU overclock FIRST, THEN XMP profile or custom memory settings. Not the other way around.
 
Oct 19, 2018
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When i Disable the XMP i got Blue Screen after the logo of the motherboard come up on the screen. Now i Increased the Voltage of DRAM Again and put it on XMP and now it booted up?! Whats happening is that normal?

P.S. 1Hour Real Benchmark Passed with 79'C Max Temp. LLC- Set to Standart.
 
Temperatures in Realbench don't matter really. You're not looking for temps in Realbench, you're looking for errors.

Anything less than 8 hours in Realbench doesn't matter either. 1 hour or 5 hours, is just the same. If you can't pass an 8 hour test, it's not stable. Just because it doesn't error in an hour, or a couple of hours, means little. If you can't run it for 8 hours you might just as well not run it at all until you can.

Also, no, that is not normal. I would start over. Pull the CMOS battery out of the motherboard with the power off and unplugged from the wall. After five minutes, put it back, plug the power back in, go into the bios and set your CPU settings for your overclock. Don't touch the memory settings. Now go back into Windows and run Realbench for 8 hours. If it passes, THEN you can go set your XMP profile and whatever voltage is necessary for the XMP profile to be stable.

And after you do THAT, you will then want to do some further testing, of the memory. Run Memtest86 for four passes. If it passes that, then run Prime95 version 26.6 Blend or Custom settings (512k min FFT, 75% of RAM)

I can show you the exact method for testing the RAM in Prime if you get that far.
 
Oct 19, 2018
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I tried for 4 Hours and it passed, still dont get out the Battery but tonight i will put i t to 8 hours and if it didnt pass i will do it. I will really appriciate the help for the RAM! I aprriciate everything u've tell me .. Thanks man for ur solid helping.. No one in the other forums and shit Helped me like u do..
 
Oct 19, 2018
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Hello i didn't reply cuz i was not in home to test it so i test it today and i passed the 8 Hours RealBenchmark Stress Test for Stability. https://imgur.com/a/XTv0NHK
Should i increase the voltage for more stabilty or i should left it like this where i am at that point? Thanks really i apriciate the help so i will make that thread solved!