Can't Boot Asrock Z170 OC w/ Dram XMP profile

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   Hey I have an Asrock Z170 OC Formula with an i7 skylake. With it I have 32gbs of Gskill f4-3400c16d-16gtz. I recently have been overclocking and I got the CPU to run stable at the 4.7gbs preset but I noticed my memory was not running the XMP profile and when I turned it on, I'm not able to boot.  The memory is %100 compatible and I've also adjusted the voltages, and turned off my CPU overclock,with no luck. I'm able to boot with the cpu overclocked if I set the dram to 3333mhz and get by that way. Does anyone know what I have to adjust to use the XMP profile? 

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gjb813 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Apr 2018 Status: Offline Points: 4	Post Options Post Reply Quote gjb813 Report Post Thanks(0) Quote Reply Topic: Can't Boot Asrock Z170 OC w/ Dram XMP profile Posted: 10 Apr 2018 at 12:25am
	Hey I have an Asrock Z170 OC Formula with an i7 skylake. With it I have 32gbs of Gskill f4-3400c16d-16gtz. I recently have been overclocking and I got the CPU to run stable at the 4.7gbs preset but I noticed my memory was not running the XMP profile and when I turned it on, I'm not able to boot. The memory is %100 compatible and I've also adjusted the voltages, and turned off my CPU overclock,with no luck. I'm able to boot with the cpu overclocked if I set the dram to 3333mhz and get by that way. Does anyone know what I have to adjust to use the XMP profile?

badbri Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 20 Feb 2018 Location: USA Status: Offline Points: 415	Post Options Post Reply Quote badbri Report Post Thanks(0) Quote Reply Posted: 10 Apr 2018 at 10:05am
	You may not be able to run them at 3400 because you are running two sets of f4-3400c16d-16gtz to get 32Gb, you are not running a matched set of four like [Trident Z] F4-3400C16Q-32GTZ which are purposely matched to run at the Overclocked speed of 3400. You are lucky to get 3333Mhz out of the ram you have. You could always increase the wait states a bit like 16-19-19-39 and see if that helps. I would not raise the voltage above 1.36v....
	https://www.passmark.com/baselines/V9/display.php?id=99573335296

gjb813 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 10 Apr 2018 Status: Offline Points: 4	Post Options Post Reply Quote gjb813 Report Post Thanks(0) Quote Reply Posted: 22 Oct 2018 at 8:36am
	I went ahead and bought the [Trident Z] F4-3400C16Q-32GTZ to see if I can get the xmp profile to work and I still can't get it to boot with 3400mhz. I successfully did it at 3200mhz though by just adjusting the frequency in the bios. Anyone know why I can't use the Xmp profile ?

thelambeers Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Oct 2018 Location: Boston Status: Offline Points: 1	Post Options Post Reply Quote thelambeers Report Post Thanks(0) Quote Reply Posted: 23 Oct 2018 at 2:03pm
	I hate to be the bearer of bad news, but I went through quite an ordeal trying to get approximately the same RAM you bought with my z370 Gaming K6 board. I had originally installed 32GB (16x2) of the TridentZ F4-3200 which worked fairly well. I recall there was a little issue in the beginning but a new BIOS release came out with essentially allowed the one-click operation of enabling the XMP profile to Just Work(tm). Fast forward ~6mo and I was back in the market for more memory due to a lot of dev work I do involving running virtual machines/containers as well as having Slack, Chrome, Spotify, etc.... running during the day as well so I purchased 64BG (32x2) of the same I had before, only difference was these chips were F4-3400. I should note that these were the basic chips, no LED. IIRC I ended up choosing them because they were the closest to what I had been running already in the configuration I wanted and was in-stock & ready to be shipped out to me. Anyway the TL;DR is I killed almost an entire day going through ALL the steps of CMOS resets, BIOS upgrades/downgrades, playing music chairs with settings in the BIOS that may have an impact on system stability, etc..... you name it and I tried it. No luck whatsoever. The system wouldn't even POST with both chips in, so obviously theres nothing to discuss when it comes to XMP. Funnily enough with the 3200's in there it _would_ boot with one of the 3400's but not both. And it didn't matter which 3400 I put in or which free slot I tried. Then I took both RAM chips in my hand and smashed them down on the hard floor. It was the first moment I felt good about that purchase. I ended up buying Corsair Vengeance RGB 64GB set @ 3466Mhz which was such simple and painless process I literally have no words to say about it. Popped them in and enabled the XMP profile. I've been running them for about a month now and still I have nothing to discuss about them they just do their job (with an optimized CPU setting loaded). I'm quite happy. :)