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Z370 Extreme4 XMP bug |
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stax 
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Joined: 24 Dec 2017 Status: Offline Points: 2 |
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 Posted: 27 Mar 2018 at 10:23pm |
Mine Z370 Pro4 tested 1.9 and 2.0 with "Improve memory compatibility.". Nothing is fixed.
However, I can run my RAM stable at 2800 (somehow 2933 does not work anymore with BIOS 2.0) instead of 3000 with XMP enabled, BCLK 100 and auto settings. Edited by stax - 02 Apr 2018 at 12:24am |
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lisurwis
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Joined: 28 Feb 2018 Status: Offline Points: 6 |
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Posted: 27 Mar 2018 at 2:37pm |
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przemciupol
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Joined: 18 Mar 2018 Location: Poland Status: Offline Points: 1 |
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Posted: 18 Mar 2018 at 3:50pm |
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I had the same issuse with Corsair
16GB (2x8GB) 3600MHz Vengeance LED RGB CL18 CMR16GX4M2C3600C18 B-Die.
After loading up XMP Settings system booted up, but my computer freezes after 20-30 seconds. I have tried to set memory timings manually: 18-19-19-39-58 and set DRAM Voltage to 1.35 V. But after thaht computer couldn't boot up. All I can do is to enable XMP profile and set memory to maximum 2800 MHz. Anything above that makes my system freeze. I was very angry with this. But on Overclock.net forum AlphaC send me link to this thread and give me advice about vccio and vccsa bug. Thanks to him I have reduce VCCIO do 1.1V and VCCSA to 1.15V and now my system is stable at 3600 MHz DDR4. But what about VCCST set to 1.25V and VCCPLL set to 1.2 V. Should I reduce voltages on those also? My specs: CPU: Intel Core i7 8700K (no
overclock) Edited by przemciupol - 18 Mar 2018 at 3:51pm |
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Matthias R.
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Joined: 09 Mar 2018 Status: Offline Points: 1 |
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Posted: 09 Mar 2018 at 2:44pm |
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[URL=][/URL]Good morning,
I recently built my first proper System, I7 8700k Z370 extreme 4 Gskill Ripjaw v 3200 16GB (2PC) (Slots A2+B2) GTX1080 Seasonic prime 650W PSU Of course I´m having the XMP issue, but none of the Adjustments here suggested works for me. Even with a complety untouched Bios and a clean Windows install the System freeze within Seconds/Minutes. Only way to get it stable was setting VCCIO 1.10, VCCST 1.05, VCCSA 1.15, but of course only at 2333mhz without XMP. If I change any of these values by only a margin the system doesn´t even boot and I have to do a CMOS reset. Setting up the timings and mhz manually, PC won´t boot..... CMOS reset Tried 3000mhz/28.../26.. etc. Tried every available Bios version. It´s quite frustrating. It run´s perfectly with 2333mhz, rocksolid etc, but It kinda feels like driving a 1000HP Bugatti with only 800HP :-) It´s great, but it could be better. Do you guys have any suggestions ? Any help would be appreciated. Greetings from Germany Matthias Edited by Matthias R. - 09 Mar 2018 at 3:29pm |
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Animalm4st3r
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Posted: 08 Mar 2018 at 1:06am |
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adjust your voltages manually and you should be fine.
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Flode
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Joined: 09 Dec 2017 Location: Germany Status: Offline Points: 110 |
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Posted: 07 Mar 2018 at 11:23pm |
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Bios 1.6 tested no fix, i think they are not even aware of this problem or they just dont give a
 .Bios 1.61 Beta not tested yet, but Changelog doesn't mention anything, will test this evening maybe. BTW running with manually changed VVCIO/VCCSA to 1.1 both perfectly stable XMP Profile 3200 @BIOS 1.6  Edited by Flode - 07 Mar 2018 at 11:25pm |
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lisurwis
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Posted: 06 Mar 2018 at 10:34pm |
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GBreezy612
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Joined: 03 Feb 2018 Location: Minnesota Status: Offline Points: 6 |
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Posted: 06 Mar 2018 at 11:43am |
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I updated the bios and XMP was still at the same settings as before. At this time I went back to my old settings and set ram to 3200 and it froze. I lowered the VCCIO and VCCSA per Flode and the PC has been stable. This setting is with the XMP profile on at DRAM setings.
Edited by GBreezy612 - 06 Mar 2018 at 11:44am |
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Cata79
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Posted: 03 Mar 2018 at 3:13pm |
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no changes about those 2 voltages, same crap.
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alchemist83
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Posted: 03 Mar 2018 at 3:57am |
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lisurwis wrote:
Yep all - 1.6 version BIOS is out! However doesnt tell us anything about it - just says CPU microcode Update. Nothing more. Can someone test and report back? I would but my MB is RMA current....