Asrock z390 Extreme4 issue
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=10508
Printed Date: 05 Aug 2025 at 3:38pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Asrock z390 Extreme4 issue
Posted By: aussie7
Subject: Asrock z390 Extreme4 issue
Date Posted: 25 Dec 2018 at 10:47pm
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Hello I have an Asrock z390 Extreme4 and I'm having issues overclocking it :( system is i5 8600k overclocked to 5000mhz gskill 2x8 16gb kit of 3000mhz ram I have overclocked to 5000mhz in bios and when I am in windows cpu-z shows the overclock, but when I stress test with prime95 the cpu speed fluctuates between 4500mhz and 5000mhz For some reason it won't stay at 5000mhz while under 100% load I have tried everything I can think of and nothing seems to fix this issue, anyone know how to fix it ? TIA :) 
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Replies:
Posted By: aussie7
Date Posted: 26 Dec 2018 at 12:42pm
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My Overclock Settings CPU CONFIGURATION CPU RATIO ALL CORE ALLCORE 40 BLCK FREQ 125 BLCK SPREAD SPECTRUM DISABLED BOOT PERFORMANCE MODE TURBO PERFORMANCE FCLK FREQ 800MHZ AVX RATIO OFFSET AUTO BCLK AWARE ADAPTIVE VOLTAGE ENABLED RING TO CORE RATIO OFFSET DISABLED INTEL SPEEDSTEP TECHNOLOGY DISABLED INTEL TURBO BOOST TECHNOLOGY ENABLED INTEL SPEED SHIFT TECHNOLOGY DISABLED LONG DURATION POWER LIMIT 130 LONG DURATION MAINTANED AUTO SHORT DURATION POWER LIMIT 150 CPU CORE CURRENT LIMIT AUTO DRAM TIMING CONFIGURATION LOAD XMP SETTING XMP2.0 BCLK FREQUENCY 125MHZ DRAM REFERENCE CLOCK AUTO DRAM REQUENCY DDR4-2200 DRAM CLOCK AUTO CPU CORE VOLTAGE FIXED VOLTAGE 1.45V CPU LOAD-LINE CALIBRATION LEVEL 1 DRAM VOLTAGE 1.45V DRAM ACTIVATEING POWER SUPPLY 2.5V PCH 1.0 VOLTAGE 1.15V VCCIO VOLTAGE 1.1V VCCST VOLTAGE 1.1V VCCSA VOLTAGE 1.2V VCCPLL VOLTAGE 1.3V CPU INTERNAL PLL VOLTAGE AUTO GO PLL VOLTAGE AUTO RING PLL VOLTAGE AUTO SYSTEM AGENT PLL VOLTAGE AUTO MEMORY CONTROLER PLL VOLTAGE AUTO |
Posted By: RLGL
Date Posted: 26 Dec 2018 at 10:18pm
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CPU temperature while under load is...??.? ------------- Asrock Z370 Gaming K6,Intel i7 8700K, Asrock x570 Taichi |
Posted By: aussie7
Date Posted: 26 Dec 2018 at 10:49pm
~65c has been delidded |
RLGL wrote:Posted By: aussie7
Date Posted: 28 Dec 2018 at 8:12pm
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can anyone help ? |
Posted By: JoeBar
Date Posted: 06 Jan 2019 at 3:44pm
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How can you have 65°c full with a 1.45v Vcore ? H2O ? Even if, what's your stress test program ? And do you have a compatible RAM to run at 1.45v ? |
Posted By: aussie7
Date Posted: 06 Jan 2019 at 10:38pm
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for starters I'm on water cooling and have had my cpu delided and i use prime95 for stress testing i was unable to run the cpu at 100% @ 5.0Ghz @ 1.45v as it under clocks back to 3.6Ghz no matter what overclock setting I use i have now changed motherboard and the cpu is running fine overclocked i suspect the problem may have been the avx ratio setting, as it was set at auto and not 0 if i get time i will test it |
Posted By: SiRoCu
Date Posted: 08 Jan 2019 at 4:29am
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Try this Settings>Power & Sleep>Additional power settings>Preferred plans.. then set to High performance And your AVX is effect to the CPU frequency so try AVX to Auto (0). |
Posted By: JoeBar
Date Posted: 08 Jan 2019 at 5:49pm
| Try using P95 v26.6, it doesn't use AVX, so you can stress test with real conditions (if you don't use encoding, or AVX using apps). |
Posted By: Globespy
Date Posted: 24 Jan 2019 at 1:15am
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Why did you change the VCCPLL to 1.3v? That's way higher than it should be, and this setting is really only for LN2 cooling. I would also dial back your VCCSA to 1.15 as it's been noted that both VCCIO and VCCSA stock voltages are too high on this board and cause issues with stability. Less is often more. Also, I would change your Long and Short power limits to 4095 (max) and your CPU core current limit to 255.50 (max) - this may be exactly why you are having issues since you are severely limiting power settings. 1.45v for 5ghz is way too much and could be causing issues - but if your CPU needs that much voltage to hit 5ghz then you simply lost the lottery and should settle for 4.8-4.9ghz given the almost insignificant performance increases in everyday things like gaming etc. 200mhz is literally a frame or two at best in most modern games as much of the performance is also GPU related, especially if you are gaming at 1440p or above where you become more GPU bound. |