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03-15-2020 01:57 AM #1New ROGer Array
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Zenith II Extreme - Disable memory training
How do you disable the memory training on boot up?
I've had my motherboard now for almost 3 months now and its super annoying to get these random reboots on post for the memory training.
It varies between no reboot, to sometimes 10-11 reboots.
I have Fast Boot enabled.
Where is MRC Fast Boot option in AI Tweaker to disable memory training?
I checked all the memory timing settings.
Was it removed?
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03-19-2020 10:44 PM #2ROG Member Array
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I have random reboots too here with:
Asus Zenith II Extreme
3970x
G.Skill Trident Z Neo (for AMD Ryzen) F4-3600C18D-32GTZN (not in QVL list)
I'm wondering why it does that.
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04-07-2020 02:01 AM #3New ROGer Array
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anyone have any ideas?
I think my USB sound card died because of these constant on/off reboot cycles during post
(I cant remember the options but I have it set so all my USB and motherboard LEDs are powered off)
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04-07-2020 05:58 PM #4ROG Enthusiast Array
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The constant on/off reboot cycles seems to be a symptom of the non alpha I had the same issues with the non alpha, but now with the Alpha it no longer does that. If I had to guess Asus really messed up on the memory on the non alpha and realized they should probably fix it but instead of replacing all the defective boards they released the Alpha. I am sure they didn't sell a ton of non alphas it probably wouldn't be that big of a deal to replace them all, but thats Asus for you.
Originally Posted by xOperator
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04-09-2020 08:25 AM #5ROG Enthusiast Array
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Try to run the memory at default voltage 1.2v and overclock the memory just using higher timing, see if that will disable memory training.
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04-09-2020 02:40 PM #6New ROGer Array hitman60 PC Specs
hitman60 PC Specs Motherboard ASUS ROG ZENITH II EXTREME Processor AMD Ryzen Threadripper 3970X Memory (part number) 64Gb DDR4 3466MHz Kingston HyperX Fury (HX434C16FB3K4/64) Graphics Card #1 MSI RTX 2080 Ti Gaming X Trio (MS-V371) Sound Card Cambridge Audio CXN v2 Monitor LG 49' SK8100 CPU Cooler HEATKILLER® IV PRO for Threadripper™ COPPER NICKEL Case Thermaltake Core W100 Power Supply 1700W Enermax Platimax (EPM1700EGT) Keyboard Roccat Sova Mouse Roccat Kone AIMO Remastered Mouse Pad Roccat Taito Control OS Windows 10 Pro
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ASUS have messed auto timings in latest bios updates, you need to use earlier bios, like 02xx-05xx, and see how it will perform. Since it have double bios, you should have one old, if you haven't updated all two. And if it will be okay on old bios, just copy and paste memory timings from old to latest bios, that's all.
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04-09-2020 08:11 PM #7New ROGer Array bluestang PC Specs
bluestang PC Specs Motherboard ASUS ROG Crosshair VII Hero Processor Ryzen 3900X Memory (part number) F4-3600C15D-16GTZ (2 kits) Graphics Card #1 MSI Armor OC 1660ti Graphics Card #2 MSI Armor OC 1660ti Monitor ASUS VZ249H Storage #1 Samsung 970 EVO 250GB NVMe Storage #2 2x WD Red 10TB (RAID1) CPU Cooler Fractal Design Celcius S36 Case Phanteks Enthoo Luxe TG Power Supply SeaSonic Focus Plus Platinum 850W Keyboard Logitech MK-710 Combo OS Windows 10 Pro Network Router ASUS RT-N66U
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Try turning off Fast Boot. Seems to cause issues with important things on bootup these days.
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04-25-2020 07:34 PM #8ROG Guru: Yellow Belt Array martine-dee PC Specs
martine-dee PC Specs Motherboard Asus ROG Maximus XII Extreme Processor Intel Core i9-10900K @ 5.2GHz, NB 4.7 GHz Memory (part number) G.Skill F4-4000C15Q-32GTZR @ 3733 MHz CL14 Graphics Card #1 Asus ROG Strix GTX 1080 Ti Gaming @ 2.025 GHz Sound Card Creative Sound Blaster AE-9 Monitor Asus ROG Swift 360Hz PG259QN Storage #1 2x Samsung SSD 860 EVO 1TB Storage #2 1x WD Blue SSD 1TB, 1x WD Red HDD 1TB CPU Cooler Corsair Hydro Series H115i RGB Platinum Case TT View 91 Tempered Glass RGB Edition Power Supply Corsair AX1600i Keyboard SteelSeries Apex 7, Red Mouse Logitech G403 Prodigy Gaming Mouse @ 3200 dpi Headset Trust Gaming GXT 444 Wayman Pro Gaming Headset Mouse Pad Logitech G440 Headset/Speakers Creative Inspire T6300 @ AE-9 OS Win 10 Pro 64bit 2004, Ubuntu 16.04 
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Hey there.
I am curious, what is the name of the memory part? E.g., mine is CMK32GX4M4A3200C16 .
Also, are the reboots happening in a loop on restart, or in the middle of your work, while the system is up and running?A Quaker here
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04-26-2020 09:17 AM #9Administrator Array
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The feature you are referring to is needed, or else your system wouldn't POST at all. If the system is retraining that many times, the memory overclock isn't stable enough to pass POST stress tests. If that's the case, you need to reevaluate your memory settings. Originally Posted by xOperator
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05-08-2020 11:36 PM #10New ROGer Array
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Turns out, this was the issue. Originally Posted by hitman60
I was on Bios 0702 (070x something)
If I reset to factory defaults, make no changes, I would still get constant reboots. In fact, I've been on factory settings for about 2 weeks now.
Anyways, flash forward to last night, I flashed my bios to 0902, did the first reboot and the memory training cycle.
Powered off completely, then booted up, and rebooted 5 more times, and it worked perfectly, no reboot cycles during the memory check.
Then enabled DOCP, after the first initial reboot cycle, rebooted 5 more times, still working perfectly.
Now I have a good baseline to tweak from.
So it seems that Bios 0702 was buggy.
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