Question PC reboots pre-BIOS and then boots normally ?

Arrigatou

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Jun 20, 2015
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Hi!

Recently I suddenly have this weird problem where my PC wont boot into the motherboard splash-screen or windows (so pre-bios) and then it reboots itself. This happens a few times before it suddenly boots normally like nothing happened.

I tried taking out the Ram, switching the sticks around and no change. I tried pulling out the GPU power, no change.

After taking out the RAM I noticed my motherboard has this Q led thingy. And when it doesnt boot it is solid red. According to the user manual (if I am reading it correctly?) it supposed to mean its the CPU thats at fault.

Would a CPU reseat fix the issue? Or is it rather a BIOS problem? Or a motherboard problem? Or any other opinions that might prove usefull to troubleshooting this?

I find it weird that after a few reboots the system boots like nothings wrong.

The CPU: Intel 11700
Memory: 2x Corsair Vengeance CMW32GX4M2D3600C18
Motherboard: asus rog strix b560-a gaming wifi
User manual

Kind regards
 
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Recently I suddenly have this weird problem where my PC wont boot into the motherboard splash-screen or windows (so pre-bios) and then it reboots itself.
This happens a few times before it suddenly boots normally like nothing happened.
Sounds like ram training process.
Automatic ram settings fail for some reason and different settings are tried (automatically) until system can boot normally.

Can you show screenshots from CPU-Z - memory and spd sections?
(upload to imgur.com and post link)
 

Arrigatou

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Jun 20, 2015
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Sounds like ram training process.
Automatic ram settings fail for some reason and different settings are tried (automatically) until system can boot normally.

Can you show screenshots from CPU-Z - memory and spd sections?
(upload to imgur.com and post link)
Ahh foolish me, not including the ram. I have 2 sticks of Corsair Vengeance CMW32GX4M2D3600C18. I have included the screenshots you asked for. What you are saying actualy do make sense in some way. Weird the motherboard says its the CPU?

Screenshots





 
Overclock your ram manually.
Set
Command Rate 1T,
DRAM voltage 1.35V,
Latencies 18-22-22-42.

Set frequency to 3200mhz and test.
Increase to 3400mhz, 3600mhz and test again.
If at 3600mhz reboots start again, then reduce to 3400mhz and keep it that way.
 

Arrigatou

Honorable
Jun 20, 2015
10
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10,510
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Overclock your ram manually.
Set
Command Rate 1T,
DRAM voltage 1.35V,
Latencies 18-22-22-42.

Set frequency to 3200mhz and test.
Increase to 3400mhz, 3600mhz and test again.
If at 3600mhz reboots start again, then reduce to 3400mhz and keep it that way.
Thanks for having a look into this! But I am confused about why I wouldnt be able to run it at 3600? I mean I bought the ram for this specific reason, even says this on the box
 

Arrigatou

Honorable
Jun 20, 2015
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1st photo - set DRAM frequency. You'll have to test different values here.
2nd photo - set latencies (top 3 values) to 18-22-42 and command rate (1T). Leave rest on auto.
3rd photo - skip enirely, don't change anything.
4th photo - set DRAM voltage to 1.35V.
ah alright! Thanks! I just tried it and it seems like 3600 isnt working..

but how come it doesnt work? While it did work before? And what is the bios doing to make it work after X amount of reboots?
 
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Arrigatou

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Jun 20, 2015
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Go to the mobo site and see if they have an update.
I learned that a bios update is like a last resort thing, but I will keep that in mind!

Or is bios flashing not that scary anymore? I heard about motherboards getting bricked because of an update error
 
I learned that a bios update is like a last resort thing, but I will keep that in mind!

Or is bios flashing not that scary anymore? I heard about motherboards getting bricked because of an update error
I suppose there is always a risk.
Read the directions and do it proper.
I've flashed the bios on this machine multiple times with no problems.
If it does not fix your problem at least you have made the suspect list smaller.
 

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