- last edited on by
ROGBot
Hi everyone
First let me say that I am not an experienced overclocker by any means, I only have experience doing basic overclocking with manual voltage. Please don't crucify me if I misunderstand something or make a mistake.
With that out the way, I have a Maximus X Hero Z370 motherboard and I am currently running my 8700k at 4.8Ghz with a manual Vcore of 1.275V in BIOS (1.264V read by AIDA64, CPUID, AI suite etc) and LLC level 6. DRAM is just set to XMP 3200mhz (G.Skill Trident Z RGB 16GB). The system is stable during AIDA64 FPU stress test and can complete a Realbench stress test without error. The core voltage reading stays at 1.264V in all situations.
I have read other threads on this forum that say it's not ideal to be on LLC level 6 and full voltage all the time so I am trying to change to adaptive voltage. I have followed this guide in an attempt to do so: http://edgeup.asus.com/2017/kaby-lake-overclocking-guide/3/?_ga=2.185832041.1973363672.1518950532-88...
I understand the guide is for Kaby Lake CPUs but I am led to believe that the process remains the same for Coffee Lake and the BIOS UI is more or less the same.
The issue I am having is that after following the instructions in the guide, when i run AIDA64 FPU stress test to test stability, the core voltage continually drops and the CPU clock speed drops with it. The voltage will start at 1.264 and after starting the test it will gradually reduce all the way down to 1.00V and the clock speed to 4Ghz before I cancel the test.
I have included some screenshots of my BIOS settings that I used, please let me know if I have missed any important information and I will do my best to provide it. Any help would be appreciated. For now I have just reverted to my manual voltage settings.
First let me say that I am not an experienced overclocker by any means, I only have experience doing basic overclocking with manual voltage. Please don't crucify me if I misunderstand something or make a mistake.
With that out the way, I have a Maximus X Hero Z370 motherboard and I am currently running my 8700k at 4.8Ghz with a manual Vcore of 1.275V in BIOS (1.264V read by AIDA64, CPUID, AI suite etc) and LLC level 6. DRAM is just set to XMP 3200mhz (G.Skill Trident Z RGB 16GB). The system is stable during AIDA64 FPU stress test and can complete a Realbench stress test without error. The core voltage reading stays at 1.264V in all situations.
I have read other threads on this forum that say it's not ideal to be on LLC level 6 and full voltage all the time so I am trying to change to adaptive voltage. I have followed this guide in an attempt to do so: http://edgeup.asus.com/2017/kaby-lake-overclocking-guide/3/?_ga=2.185832041.1973363672.1518950532-88...
I understand the guide is for Kaby Lake CPUs but I am led to believe that the process remains the same for Coffee Lake and the BIOS UI is more or less the same.
The issue I am having is that after following the instructions in the guide, when i run AIDA64 FPU stress test to test stability, the core voltage continually drops and the CPU clock speed drops with it. The voltage will start at 1.264 and after starting the test it will gradually reduce all the way down to 1.00V and the clock speed to 4Ghz before I cancel the test.
I have included some screenshots of my BIOS settings that I used, please let me know if I have missed any important information and I will do my best to provide it. Any help would be appreciated. For now I have just reverted to my manual voltage settings.
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Ok so I've just carried out the above and with LLC level 4 my system can pass AIDA64 FPU stress test and Realbench Stress Test without losing clock speed. It is worth noting with LLC on auto the system crashed straight away when starting AIDA64 FPU test.
I'm seeing 1.264V idle (high performance power plan, 0.650V on balanced) however it jumps to 1.280V for a split second every so often for some reason. At full load in ADIA64 FPU test the voltage drops to 1.232V and is stable. Temps are lower than before as a result which is good:
However in Realbench I see the voltage bounce around between 1.216V to 1.248V the entire time. You can see it in this video:
On a side note you can see ROG CPUID and Core temp's readings seem to flicker during the stress test, is this normal because the system is being hammered or is it a sign of instability? Realbench still passed with no errors.
Forgive me for being a noob here but I'm still a little unclear as to what level of LLC is safe for my voltage setting. My understanding is that LLC reduces vdroop but can increase the voltage overshoot when coming off load. I also understand that this overshoot is so brief it's not detectable by software, which is why I'm confused about what level is safe for long term use. I got the above info from this video from Der8auer:
https://www.youtube.com/watch?v=_XGhpKHWYAg
Thanks a lot for helping me get this far, I really appreciate it.
I'm seeing 1.264V idle (high performance power plan, 0.650V on balanced) however it jumps to 1.280V for a split second every so often for some reason. At full load in ADIA64 FPU test the voltage drops to 1.232V and is stable. Temps are lower than before as a result which is good:
However in Realbench I see the voltage bounce around between 1.216V to 1.248V the entire time. You can see it in this video:
On a side note you can see ROG CPUID and Core temp's readings seem to flicker during the stress test, is this normal because the system is being hammered or is it a sign of instability? Realbench still passed with no errors.
Forgive me for being a noob here but I'm still a little unclear as to what level of LLC is safe for my voltage setting. My understanding is that LLC reduces vdroop but can increase the voltage overshoot when coming off load. I also understand that this overshoot is so brief it's not detectable by software, which is why I'm confused about what level is safe for long term use. I got the above info from this video from Der8auer:
https://www.youtube.com/watch?v=_XGhpKHWYAg
Thanks a lot for helping me get this far, I really appreciate it.
