Question Bios resets after being powered down overnight.

Apr 28, 2021
4
0
10
0
I've cross posted this on a few forums here's the other posts:

Reddit:
View: https://www.reddit.com/r/buildapc/comments/n0c88g/bios_resets_after_being_powered_down_overnight/

Gigabyte Forums:
https://forum.gigabyte.us/thread/12118/trx40-aorus-master-resets-overnight

Linus Tech Tips:

My set up:

CPU: Threadripper 3960x

https://www.amd.com/en/products/cpu/amd-ryzen-threadripper-3960x



Mobo: TRX40 Aorus Master Rev 1.1 (updated to latest Bios Fbi)

https://www.gigabyte.com/uk/Motherboard/TRX40-AORUS-MASTER-rev-11#kf



GPU: Zotac Gaming Geforce RTX 3090 Trinity

https://www.zotac.com/us/product/graphics_card/zotac-gaming-geforce-rtx-3090-trinity



Display GPU: EVGA GTX 980ti

https://www.evga.com/Products/Specs/GPU.aspx?pn=0FAB4AA9-8613-4969-A376-5EFEB7172C8C



RAM: Corsair Vengeance RGB Pro 128gb (4x32gb)

https://www.corsair.com/uk/en/Categories/Products/Memory/Vengeance-PRO-RGB-Black/p/CMW128GX4M4D3600C18



Power Supply: Corsair HX1200

https://www.corsair.com/uk/en/Categories/Products/Power-Supply-Units/hxi-series-2017-config/p/CP-9020140-UK



Hard Drives: 2x WD HDDs 6x SSDs (I'm using every available Sata connection on the Mobo)



CPU cooling: Fractal Design Celsius+ s36

https://www.fractal-design.com/products/water-cooling/celsius-plus-s36-dynamic/celsius-s36-dynamic/



Case: Fractal Design Meshify 2 XL (Mentioning this as it has it's own fan control board built in)

https://www.fractal-design.com/products/cases/meshify/meshify-2-xl-dark-tempered-glass/black/





Since building this PC a month ago the Bios has reset when the computer is powered down over night. So when I come to turn on the PC in the morning it spends 5 minutes with all fans at full speed (I assume this is the BIOS being reset once again?). Then it boots 4(ish) more times before it finally posts. If I access the bios settings at this point I get the message saying 'BIOS has been reset. Please re-config your BIOS setup items if needed.'



I have updated the BIOS twice (once to FBh and more recently to FBi). The only settings I'm adjusting in the BIOS is the RAM XMP profile and changing the initial display output from PCIE 1 (where my 3090 lives) to PCIE 4 (where my 980ti works as my display GPU). I've also made sure the RAM is installed in the correct slots as I'm only using 4 out of 8.



My BIOS switches are set to single BIOS and I'm using the main BIOS



I have on three separate occasions checked all of the power/sata/pcie connections and everything is sitting snug and firm.



I have replaced the CMOS battery (original battery was registering 3.1v or 2.6-2.9 with resistance. New battery is measuring 3.3v or 3.0-3.1 with resistance). I left the PC switched on all day with the new battery, but it still reset when I had it turned off overnight.



The Clear CMOS jumpers are not connected in any way.



I have tried swapping the 980ti for a low powered GTX1050 in case the initial power draw was too much.



I have powered the PC down, turned off at the plug and unplugged for over 1 minute, it boots absolutely fine from this state. It also boots fine if I leave the PC off for a few hours. But if I leave it off overnight, it resets when I turn it on in the morning.



I really don't want to have to RMA the motherboard as it's my work machine. If there's anything else I can try please let me know!



My RAM is sold as supported for Trx40 boards (check the link), but the exact Module P/N doesn't come up on the memory support list for the Mobo. Could this be tripping the CMOS reset? I've not had any other issues from the RAM, and once I have the XMP profile active my zen timings are looking good.



I have plugged in both 8-pin atx 12 volt power connections as my equipment is pretty power hungry, maybe I should only have one plugged in?



Would it matter which CPU Fan connection I used for the liquid cooling system?



I'm honestly struggling to figure out what it could be now. Any help would be hugely appreciated!!!
 
Last edited:
Apr 28, 2021
4
0
10
0
It looks to have a dual BIOS option. Try setting the little switches under the segmented LCD display to one up and one down. (Check your manual for proper positions.)
So in the manual I have:
BIOS_SW 1. Main BIOS (currently selected) 2. Backup BIOS (not selected)
SB 1. Dual Bios (not selected) 2. Single Bios (currently selected)

Are you suggesting I switch both or one?
 
....

I have updated the BIOS twice (once to FBh and more recently to FBi). The only settings I'm adjusting in the BIOS is the RAM XMP profile and changing the initial display output from PCIE 1 (where my 3090 lives) to PCIE 4 (where my 980ti works as my display GPU). I've also made sure the RAM is installed in the correct slots as I'm only using 4 out of 8.

...

I'm honestly struggling to figure out what it could be now. Any help would be hugely appreciated!!!
I am wondering if it's re-training memory when it boot loops as it is. Some BIOS' are designed to reset if it fails a first boot attempt (there may be a setting for it in BIOS you can disable) so when it fails the first boot it resets and then re-trains memory.

Does it ever do this if in absolute, full on defaults as right after a CMOS reset and ESPECIALLY with memory settings at defaults? that is, not setting XMP on the memory, just to see if it stops the boot looping?

If it should stop resetting and boot looping when XMP is disabled then try manually setting it's voltage and even setting it a bit higher than what the DIMM mfr. says it should be. So if the RAM says it's operating voltage is 1.35V try setting that first then 1.38V or even 1.40. DDR4 is safe up to 1.5V and you can always back it down to the lowest it can handle later.
 
Last edited:
Apr 28, 2021
4
0
10
0
I am wondering if it's re-training memory when it boot loops as it is. Some BIOS' are designed to reset if it fails a first boot attempt (there may be a setting for it in BIOS you can disable) so when it fails the first boot it resets and then re-trains memory.

Does it ever do this if in absolute, full on defaults and ESPECIALLY with memory settings at defaults? that is, not setting XMP on the memory. just to see if it stops the boot looping?

If it should stop resetting and boot looping when XMP is disabled then try manually setting it's voltage and even setting it a bit higher than what the DIMM mfr. says it should be. So if the RAM says it's operating voltage is 1.35V try setting that first then 1.38V or even 1.40.
Unfortunately even when I used the BIOS default settings for my RAM it still resets the BIOS if left off overnight.

The default is 1.2v and the XMP profile is 1.35v if that makes any difference.

And the component part number is H5ANAG8NMJR-TFC. Not sure if it being MJR makes a difference?

With the default settings my MCLK is 1067 FCLK is 1200 and UCLK is 1067. With the XMP profile they're all 1800

Also in Thaiphoon it's showing me I have 7 options to read from, guessing this is because of some kind of error with the memory using the default settings? It shows Read SPD on SMBus #0 at 50h-57h.

I'm not well versed enough to know what it all means so just providing all the info I can to bigger brained PC builders!
 
....

The default is 1.2v and the XMP profile is 1.35v if that makes any difference.

...

With the default settings my MCLK is 1067 FCLK is 1200 and UCLK is 1067. With the XMP profile they're all 1800

...
The FCLK of 1200 suggests default DDR4 speed will be 2400. At 2400 it SHOULD operate with 1.2V (JEDEC spec) so that being the voltage in default should be fine.

BUT, some motherboards do not correctly apply full XMP voltage right at boot up and some RAM's don't seem to operate at 1.2V even in default clocks as they should. That's where manually setting a voltage can help...or even setting it bit higher. As I said, DDR4 is good up to 1.5V but it's not a good idea to run it over 1.45V unless your comfortable with it. I'd try increasing voltage by manually setting it until it stops that boot-looping/reset thing.

Lastly, those 8 DIMM sockets are probably distributed among 4 memory channels. I'm not familiar with them but running with 2 sticks on a memory channel will probably limit overclocking potential even with Threadrippers. So check your motherboard manual and make sure you've distributed your 4 sticks so each one is in the correct sockets if you haven't done that already. That should locate one stick per channel in the channel's socket that's furthest from the CPU.
 
Last edited:

ASK THE COMMUNITY

TRENDING THREADS