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Z370 Extreme4 XMP bug

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donatuss View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote donatuss Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec 2017 at 2:31am
I just wanted to thank Flode for the solution, I had the same problem (ASRock Exterem4 Z370, Corsair Vengeance LPX 32GB 2x16GB DDR4 3200MH) - reducing the voltage works
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Gilph View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gilph Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2017 at 9:24am
HI, I can also verify that reducing the VCCIO and VCCSA voltage works and gets rid of the Windows 10 hangs. I am using G. Skill F4-3600c16-8GVK. Dropped the voltages to 1.12 and 1.17, respectively. Thanks to Flode from me also.

edit: I really need to learn to type


Edited by Gilph - 16 Dec 2017 at 9:28am
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ppeetoom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ppeetoom Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2017 at 5:40am
Same problem and working solution:

- Asrock Z370 Extreme4
- 2x8Gb Patriot 3200Mhz PV416G320C6K
- Intel i3-8100
- Ubuntu 17.10

Hangs up system every few hours, needs reboot. Though strangely error-less and solid in Memtest86+.

Lowering the before mentioned voltages makes it solid as a rock at XMP profile.

@Flode : you are THE man. Thanks


Edited by ppeetoom - 18 Dec 2017 at 5:41am
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DatIntelBoi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DatIntelBoi Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2017 at 10:20am
Thank you Flode! This worked like a charm.
Sincerely, DatIntelBoi.
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hansi12 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hansi12 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2017 at 12:16am
reducing helped me too get rid of mem errors
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sciboot Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2017 at 6:49pm
Originally posted by Gilph Gilph wrote:

HI, I can also verify that reducing the VCCIO and VCCSA voltage works and gets rid of the Windows 10 hangs. I am using G. Skill F4-3600c16-8GVK. Dropped the voltages to 1.12 and 1.17, respectively. Thanks to Flode from me also.

edit: I really need to learn to type
My system specs:
Intel Core i7 7700K @ stock 
ASRock z270 Extreme4 bios P2.30
G.SKILL Ripjaws V Series 32GB F4-3200C16D-32GVK (16GBx2)

I dropped mine to 1.02V and 1.07V(same as yours but i took out a 1 and added a 0) and it seems to have stabilized XMP 3200 like the rest of you have reported. It would freeze within 20 seconds of me starting a game but that no longer happens so it must be fixed. Also should I increase my voltage or since its working fine should I just leave it alone? Its actually hard to even get the board to boot to even check out what the bios set them to when XMP was enabled so I just kind of set it to that to see what it would do.

Also thank you flode! 


Edited by sciboot - 26 Dec 2017 at 7:27pm
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stax View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote stax Quote  Post ReplyReply Direct Link To This Post Posted: 24 Dec 2017 at 1:58pm
Hi everyone, I am using Mainboard ASROCK Z370 Pro4 updated to latest BIOS 1.5 with Intel I3-8100
I have this RAM VENGEANCE┬« RGB DDR4 DRAM 3000 MHz C15 (1x8GB)

The XMP profile auto setting makes my PUBG PC 1.0 games always crash. ArcheAge also crashes. Even Dota 2 crashes too every 5-10 mins with FPS 200+

I have tried to set VCCIO to 1.1V and VCCSA to 1.15 but it no works. 
I've also tried ASRock_TSD's advice here but no work also. http://forum.asrock.com/forum_posts.asp?TID=6684&title=z370-extreme4-xmp-issues-other-mobo-issues

However, the game runs perfectly at default SPD Speed with auto setting at 2133 MHZ.

I don't know much about these overclocking stuff. Maybe you guys can help.
Please help me how to do the setting to run my RAM at 3000 MHZ.

Thank you.



Edited by stax - 26 Dec 2017 at 12:32pm
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hansi12 View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote hansi12 Quote  Post ReplyReply Direct Link To This Post Posted: 25 Dec 2017 at 6:57am
Things first, 3000Mhz memory is OC and not guaranteed to work out of the box.

1 stick of memory has to go in slot A2 i believe.
Do load the XMP profile, but manually refine it.
Start with a safe setting that is stable and work your way up.
Lowering the mem clock may help. It may also be possible to lower timings to counter the negative effect. Or do vice versa, raise them.
Raise voltages of VCCSA or VDIMM
Lower the CPU clock or cache clock may help.

Im sure 3000mhz memory is easy to achieve, even on an "entry" board like this.

Make sure you run prime95 and memtest a bit to make sure your system is stable. These tests are good.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote WR07 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Dec 2017 at 7:15am
Just registered this account to say the Flode solution worked for me. 

I had been pulling my hair out trying to get my setup to work at 3200MHz but kept getting hit with complete freeze-ups at seemingly random times. Thanks to Flodes solution not only have I been able to run my ram at 3200MHz but I'm also able to maintain a 4.5GHz overclock on the CPU as well -- something I hadn't been able to do before.

Just to reiterate -- my problem was fixed by entering the BIOS and selecting XMP Profile 1 for 3200MHz, then I went to advanced settings and manually edited the voltage settings of VCCIO to 1.1V and VCCSA to 1.15V. 

For reference, my build is as follows:
-CPU: Intel i7-8700k
-Memory: G.SKILL TridentZ RGB Series 16GB (2 x 8GB) DDR4 3200 (PC4 25600), Model F4-3200C14D-16GTZR
-Motherboard: ASRock Z370 Extreme4 (obviously)
-Storage: Samsung 850 Evo - 500gb
-GFx Card: EVGA GTX 1080 SC
-PSU: EVGA G2 850W

I'll be running some more stress tests on the setup but it seems to be holding quite well. I cannot thank Flode and this community enough.  I'll make sure to report back here if I run into any problems. (knock on wood)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gaara Quote  Post ReplyReply Direct Link To This Post Posted: 29 Dec 2017 at 6:31am
Adjusting VCCIO and VCCSA voltages also seems to have worked for my recently built 8700K system. Still need to run a more thorough test to be sure, but no problems for about an hour now. Before, Windows would freeze up within 5 minutes of boot when using the XMP profile. Worked fine at Auto setting with much lower speed and higher timings.

Unfortunately, I was not aware of this solution 3 weeks ago and spent a lot of time and stress troubleshooting/sending in the G.Skill RAM (Model F4-3200C14D-16GTZKW, which has the Extreme4 listed on the G.Skill QVL) for RMA only for the replacement sticks to behave exactly the same with this mobo. First ASRock product I've ever owned and I already regret it.
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