Z370 Extreme4 boots twice

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   Hi there, I'm fairly new to the world of PC so I hope I'm not being too naive here.
Every time I turn on my PC it boots twice, first it powers up, 'clicks' out, then boots again and works perfectly fine the second time. I've researched this a little and seems someone has had a similar issue: http://forum.asrock.com/forum_posts.asp?TID=6684&title=z370-extreme4-xmp-issues-other-mobo-issues

But their spec and problem is not exactly the same as I'm not sure it's related to the RAM. 

I have an intel i7 8700, which looks to sit at 3.19GHz all the time? Corsair Vengeance LPX 16GB RAM (2x8GB) DDR4 3000 with the model number CMK16GX4M2B3000C15, which is recognised on the mobo compatibility list. My power supply is a Corsair RMx 550 which works perfectly fine as far as I can see. Any other details that would help please let me know. Hope I can find some help with this peculiar issue! Thanks!

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chugasaurus92 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Mar 2018 Location: England Status: Offline Points: 7	Post Options Post Reply Quote chugasaurus92 Report Post Thanks(0) Quote Reply Topic: Z370 Extreme4 boots twice Posted: 04 Apr 2018 at 5:05pm
	Hi there, I'm fairly new to the world of PC so I hope I'm not being too naive here. Every time I turn on my PC it boots twice, first it powers up, 'clicks' out, then boots again and works perfectly fine the second time. I've researched this a little and seems someone has had a similar issue: http://forum.asrock.com/forum_posts.asp?TID=6684&title=z370-extreme4-xmp-issues-other-mobo-issues But their spec and problem is not exactly the same as I'm not sure it's related to the RAM. I have an intel i7 8700, which looks to sit at 3.19GHz all the time? Corsair Vengeance LPX 16GB RAM (2x8GB) DDR4 3000 with the model number CMK16GX4M2B3000C15, which is recognised on the mobo compatibility list. My power supply is a Corsair RMx 550 which works perfectly fine as far as I can see. Any other details that would help please let me know. Hope I can find some help with this peculiar issue! Thanks!

JoseyWhales Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 01 Apr 2018 Location: Private Status: Offline Points: 13	Post Options Post Reply Quote JoseyWhales Report Post Thanks(0) Quote Reply Posted: 05 Apr 2018 at 2:21pm
	[URL=][/URL]Mine booted twice, because of the same exact memory that you have. Have you tried memtest86+? I got new RAM(same kind) and so far: No issues, as of yet, I'm just waiting on my RMA'd(by mistake)GPU. My first pass I got around 30 errors, right away. The second RAM stick yielded no errors, at first until the next day, it was the only one in it, and it gave off over 1100 errors; The RAM isn't even suppose to have 1 error. Are your RAM sticks inside (A2, B2)? If you suspect faulty RAM by memtest, or windows "memory diagnostic" BSoD's and such, then i'd wager it's your RAM. If it's your brand new RAM, then get a replacement from wherever you ordered it from quickly. Edited by JoseyWhales - 05 Apr 2018 at 2:34pm

JoseyWhales Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 01 Apr 2018 Location: Private Status: Offline Points: 13	Post Options Post Reply Quote JoseyWhales Report Post Thanks(0) Quote Reply Posted: 05 Apr 2018 at 2:37pm
	Also, my DRAM voltage is automatically sitting at 1.36v, what does yours read?

ssateneth Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 19 Oct 2017 Status: Offline Points: 114	Post Options Post Reply Quote ssateneth Report Post Thanks(0) Quote Reply Posted: 05 Apr 2018 at 5:08pm
	If your PC doesn't have any errors or issues or rolling back of settings, then I wouldn't worry about it. Consider it part of normal bootup process.
	MB: X399 Taichi, UEFI L3.32 VGA: EVGA 1080 Ti FTW3 PSU: Seasonic PRIME 1300 W PLATINUM CPU: AMD Ryzen Threadripper 2950X MEM: 4x16GB, 3600MHz G.Skill Trident Z F4-3600C17Q-64GTZKW

chugasaurus92 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Mar 2018 Location: England Status: Offline Points: 7	Post Options Post Reply Quote chugasaurus92 Report Post Thanks(0) Quote Reply Posted: 06 Apr 2018 at 6:14am
	Good to know thank you!! I haven't tried memtest86+ yet no, first I've heard of it but looks very useful so I will check that out this weekend when I'm off work. Will also get back to you with my DRAM voltage

chugasaurus92 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Mar 2018 Location: England Status: Offline Points: 7	Post Options Post Reply Quote chugasaurus92 Report Post Thanks(0) Quote Reply Posted: 06 Apr 2018 at 2:57pm
	Just tried Windows Memory Diagnostic and it came back with 0 faults, I can try memtest86+ also. My RAM is an slots A2 and B2 and it's voltage is 1.35v if I remember correctly.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 22928	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 06 Apr 2018 at 5:51pm
	Disable XMP and see if it still does a power cycle before posting. Usually things like this are caused by RAM training. The system tries to post with the XMP settings, fails, restarts then succeeds on the second try. This is usually caused by either incompatible RAM, this varies in severity from not working at all to issues like you described, or unstable overclocks on the RAM. Sometimes upping the voltage by a fraction resolves the issue so from 1.35v to 1.36/1.37.


chugasaurus92 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Mar 2018 Location: England Status: Offline Points: 7	Post Options Post Reply Quote chugasaurus92 Report Post Thanks(0) Quote Reply Posted: 08 Apr 2018 at 2:56pm
	Setting XMP to auto does seem to have done the trick! Swear I did this before but I think it read my RAM as 2133, now it's reading it correctly at 3000MHz. Thanks for the help all, will report back if I find any other anomalies. Also good luck JoseyWhales on getting a working GPU !

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 22928	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 08 Apr 2018 at 3:55pm
	Thanks for letting us know Enjoy the new build


chugasaurus92 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Mar 2018 Location: England Status: Offline Points: 7	Post Options Post Reply Quote chugasaurus92 Report Post Thanks(0) Quote Reply Posted: 13 Apr 2018 at 4:11pm
	Slight update! Setting my XMP to auto reverts my RAM back to 2133 MHz like I thought it might! Any recommendations on how to set it to 3000 manually?