x370 Killer AC Boot Issue
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=5476
Printed Date: 19 Jul 2025 at 10:54am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: x370 Killer AC Boot Issue
Posted By: CocoaThumper
Subject: x370 Killer AC Boot Issue
Date Posted: 30 Jun 2017 at 7:07am
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" rel="nofollow - Hello, I have my x370 SLI Killer/AC motherboard is having boot issues. It was fine the first couple days I built the system, but now it struggles to boot before finally posting and opening windows. After I press the power button, the fans and everything start up for about 4 seconds, then shuts off. Then it automatically starts up again, and shuts off after a few seconds. Then it does this again 1 or 2 times, before finally revving the CPU fan to a higher RPM for a slight second, and then posting. My PSU is fine, as it is a several month old EVGA GS3 750w that was powering other systems just fine. Regarding components, I have a basic overclock on the CPU at 3.7ghz with 1.3 volts. The Ram is overclocked using its standard XMP profile and thus running at its rated DDR4 3200 MHz speed. Anyone care to chime in? Once I get into windows, the system is stable...but Id like to fix this problem. Don't want this to get worse. |
Replies:
Posted By: AlbinoRhino
Date Posted: 30 Jun 2017 at 8:09am
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" rel="nofollow - The rebooting over and over is typically a symptom of an OC gone bad. I would drop the Ram OC first and try that out for a few boots. If it is still problematic I would drop the CPU OC and try that. If it still continues with both the CPU and Ram running stock then I would try one Ram stick at a time to see if one of them is having issues. Edit: forgot to mention that the rebooting is a built in feature that allows the mother board to try and stabilize the system before removing a Ram OC and throttling it back to 2133 for a successful boot. Does your Ram revert to 2133 after the constant rebooting? |
Posted By: CocoaThumper
Date Posted: 30 Jun 2017 at 9:00am
| I get into Windows with my overclocks in tact. My Ram does not drop down. |
Posted By: CocoaThumper
Date Posted: 30 Jun 2017 at 9:28am
| Ill do more testing and report back |
Posted By: CocoaThumper
Date Posted: 30 Jun 2017 at 10:53am
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" rel="nofollow - Update, Yeah, it was the ram. I reset the ram and now its fine. UGH. But I used the XMP profile, and I specifically bought Gskill RAM that was Samsung B die with 14-14-14-34 timings so I could overclock to DDR4 3200 :( Any ideas on further tweaks so I can get it stable? |
Posted By: wardog
Date Posted: 30 Jun 2017 at 11:01am
Great news huh. Further tweaks. Please start by listing your systems specs, PSU included. Also any tweaks you've done to date. |
CocoaThumper wrote:Posted By: CocoaThumper
Date Posted: 30 Jun 2017 at 11:30am
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Ryzen 1700 currently overclocking to 3.8ghz with 1.35 volts Two 8GB sticks of Gskill Tridentz DDR4 3200 CL14 RAM (Samsung Bdie) Asrock x370 SLI Killer AC motherboard XFX RX 480 8GB GPU EVGA G3 Gold 750w PSU Crucial MX300 525GB SSD |
Posted By: wardog
Date Posted: 30 Jun 2017 at 1:27pm
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" rel="nofollow - What Kit # of TridentZ, and is running at its rated 3200? |
Posted By: CocoaThumper
Date Posted: 30 Jun 2017 at 2:11pm
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My ram is G.SKILL F4-3200C14D-16GTZ SW I tried running the XMP profile, but that's when I run into issues with boot. Sometimes windows will load up at 3200mhz just fine. Other times the motherboard will clear my settings and set the ram down to 2133mhz I don't do any tweaks to the RAM settings besides the XMP profile. EDIT : I plan to test the RAM by running my system with each stick individually at stock and overclocked. Ill report back tomorrow evening. |
Posted By: wardog
Date Posted: 30 Jun 2017 at 3:36pm
You can yet I'm thinking it's Both memory voltages you need tweak. Try using 53.3 procODT, 1.375v DRAM, and DRAM VTT to 0.69 or 0.70 Let me know how that goes |
Posted By: wardog
Date Posted: 30 Jun 2017 at 3:46pm
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And check that XMP @ 3200 sets them to 14-14-14-34-48 2T |
Posted By: AlbinoRhino
Date Posted: 30 Jun 2017 at 5:52pm
" rel="nofollow -
Yeah it's a bit of a bummer that the XMP profiles don't always work without a bit of tweaking. I'm betting you can run 2933 with zero fuss until you can fine tune 3200. I had the Tridents as well and couldn't get them to boot at 3200 at all a month ago. They're making great progress though so sometime in the foreseeable future these things won't be a problem. |
Posted By: nycalex
Date Posted: 30 Jun 2017 at 7:49pm
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" rel="nofollow - if you don't feel like messing with the settings, just choose xmp and then from drop down menu go with 2933. 2933 vs 3200 is minimal difference. i got the same ram as yours, but the cheaper cas 16 version with hynix die and same motherboard. i can boot fine @ 3200, but it crashes when i game. with 2933 is been rock solid so far. also, this may sound dumb..........but in what slots did you install the memory? a1 + b1? or a2 + b2? try going xmp @ 3200 with rams installed in A2 and B2 (second from the left and fourth from the left). This simple fix enabled my ram to go 2933, before i was only able to go 2400. |
Posted By: CocoaThumper
Date Posted: 05 Jul 2017 at 1:28am
" rel="nofollow -
Ill give this a try. Could you lightly explain what procODT and DRAM VTT are? Also, I'm a little concerned overclocking the RAM voltage to 1.375 as aren't we already overclocking quite a bit when I use the rated XMP profile to go up to 3200mhz and 1.35v ? I'm new to RAM overclocking, and it always seemed like people just overclocked as far as the sticker on the RAM told them to. @wardog |
Posted By: CocoaThumper
Date Posted: 11 Jul 2017 at 6:57am
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" rel="nofollow - Update: I tried the XMP profile again. Now the 3200mhz XMP profile works just fine. No failed boot attempts...and the motherboard doesn't downclock the RAM. The only thing that's changed is I got my CPU overclock dialed in a bit better with Pstates. Could that have been it? The RAM all of a sudden overclocking better doesn't make sense to me. |
Posted By: wardog
Date Posted: 11 Jul 2017 at 11:24am
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" rel="nofollow - Find some wood and give it a knock or twelve heh? Ryzen is very picky concerning voltages. The smaller the litho gets we'll be seeing more and more of this. Damn electrons wanting to do their own thing anyways ......... |