First off, I am using a delided i7-8700K + Noctua NH-D15. I have overclocked everything I've owned for the last 17 years, so I've got a pretty good handle on how it works.
First, I bought the Asrock Z390 Extreme4 motherboard.
After a week, the best I could get was a 4.9GHz (no avx) stable overclock at 1.376v load and an average CPU Package Power draw of 186W. I tried all the way up to 1.420v and could not get 5.0GHz stable no matter how hard I tried. At 5.0GHz, no matter the voltage, the system would freeze in a matter of minutes and fail P95 (no avx) immediately. Max temps never reached over 82C, and the Extreme4 is supposed to have good VRMs, so I figured I just lost the silicon lottery and 4.9GHz was all my chip would do.
One thing I did notice with this motherboard is that I could never eliminate Vdroop no matter what LLC I used. I always left it on LLC1, the highest. At a vcore setting of 1.400 in the bios, I would get 1.392v idle, 1.376v load. I even had a fan blowing directly on the VRM heatsinks to make sure they were always cool.
Second, I bought the Gigabyte Z390 Aorus Pro motherboard.
After reading some good reviews, and seeing that it had more vrms, I figured it couldn't hurt to give it a try. After a few hours of tinkering, I am now 2+ hours into Prime95 (no avx) at 5.10GHz, 1.380v load, with an average CPU Package Power draw of 162W!
With a setting of 1.390v in the bios, LLC at "turbo", I get a solid 1.380v idle and load.
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I have used HWiNFO64 primarily for sensor readings, but double checked with many other programs and they are all reading about the same. Both boards have the most current bios versions.
Is the Gigabyte really that much better of a board for the same price??
I've been a big fan of Asrock for years, and a lot of people highly recommend the Z390 Extreme4 as being great for overclocking the i7-8700K, but it seems like a dud to me... or maybe I just got a bad board?
How is it that with the Asrock, the cpu was drawing 186W on average at 1.376v / 4.9GHz, but with the Gigabyte, the cpu is drawing 162W on average at 1.380v / 5.1GHz? I've checked all the power settings and many software programs, there is no power throttling of any type going on. Is the Gigabyte board really that much more efficient?
Does anyone know if the Gigabyte Z390 Aorus Pro has voltage check points that I could use with a multimeter to manually check the vcore? I just want to make sure the sensors aren't lying, and that I am not putting more voltage to the CPU than motherboard is reporting. Though, temps are great with 78C max on any core, and average around 75C between cores.
This post is partially informative, as I would now highly recommend the Gigabyte Z390 Aorus Pro over the Asrock Z390 Extreme4 by far to anyone who is shopping for the best value in an overclocking Z390 board. I am also curious as to why I am having such different results between these boards, as the Asrock seems to be highly regarded. I am only using a 6-core i7-8700k, not the 8-Core i9s that it's rated for.
First, I bought the Asrock Z390 Extreme4 motherboard.
After a week, the best I could get was a 4.9GHz (no avx) stable overclock at 1.376v load and an average CPU Package Power draw of 186W. I tried all the way up to 1.420v and could not get 5.0GHz stable no matter how hard I tried. At 5.0GHz, no matter the voltage, the system would freeze in a matter of minutes and fail P95 (no avx) immediately. Max temps never reached over 82C, and the Extreme4 is supposed to have good VRMs, so I figured I just lost the silicon lottery and 4.9GHz was all my chip would do.
One thing I did notice with this motherboard is that I could never eliminate Vdroop no matter what LLC I used. I always left it on LLC1, the highest. At a vcore setting of 1.400 in the bios, I would get 1.392v idle, 1.376v load. I even had a fan blowing directly on the VRM heatsinks to make sure they were always cool.
Second, I bought the Gigabyte Z390 Aorus Pro motherboard.
After reading some good reviews, and seeing that it had more vrms, I figured it couldn't hurt to give it a try. After a few hours of tinkering, I am now 2+ hours into Prime95 (no avx) at 5.10GHz, 1.380v load, with an average CPU Package Power draw of 162W!
With a setting of 1.390v in the bios, LLC at "turbo", I get a solid 1.380v idle and load.
------------------------------------------------------------------------------------------------------------------
I have used HWiNFO64 primarily for sensor readings, but double checked with many other programs and they are all reading about the same. Both boards have the most current bios versions.
Is the Gigabyte really that much better of a board for the same price??
I've been a big fan of Asrock for years, and a lot of people highly recommend the Z390 Extreme4 as being great for overclocking the i7-8700K, but it seems like a dud to me... or maybe I just got a bad board?
How is it that with the Asrock, the cpu was drawing 186W on average at 1.376v / 4.9GHz, but with the Gigabyte, the cpu is drawing 162W on average at 1.380v / 5.1GHz? I've checked all the power settings and many software programs, there is no power throttling of any type going on. Is the Gigabyte board really that much more efficient?
Does anyone know if the Gigabyte Z390 Aorus Pro has voltage check points that I could use with a multimeter to manually check the vcore? I just want to make sure the sensors aren't lying, and that I am not putting more voltage to the CPU than motherboard is reporting. Though, temps are great with 78C max on any core, and average around 75C between cores.
This post is partially informative, as I would now highly recommend the Gigabyte Z390 Aorus Pro over the Asrock Z390 Extreme4 by far to anyone who is shopping for the best value in an overclocking Z390 board. I am also curious as to why I am having such different results between these boards, as the Asrock seems to be highly regarded. I am only using a 6-core i7-8700k, not the 8-Core i9s that it's rated for.