[SOLVED] PC fails on first boot

[Renato2005]

Hi,

I'm seeking for some help with my refreshed setup. I just bought a new mobo-cpu-ram combo and I'm experiencing an weird behavior:
Every first boot the PC does not even POST, it keeps stuck on a boot loop for 5 seconds before shutting down and starting up again - what do I do: I remove one of the memory sticks, press power and it works normally.
So I wait for windows to load, ask for a shut down (shuts down), reinsert the removed stick, power on and voilá - everything runs as expected.

I had ran some tests already, in order to try to isolate the issue but no success at all. This is what I did already:

• Run memtest with both RAM sticks during the night: no errors;
• removed the GPU (in order to use less power from GPU): no difference;
• changed the ram slots, and orders: no difference;
• changed the CMOS battery for a new one: nothing;
• updated BIOS to last version: nothing;
• removed 3 of 4 storage devices (1 sata SSD and 3 sata HDD, removed the later): nothing;
• EDIT: noticed that time/date gets wrong sometimes.

So I'm kind running out of ideas of what to do, I don't have an easy access to another PSU, and I'm not sure if it's the right path to follow. Could you guys please try to enlight me with some directions?

My build is now:
CPU: i7 9700F
RAM: 2x16GB XPG Spectrix D41, 3000MHz
MOBO: Gigabyte Z390 M Gaming
GPU: Gigabyte GTX970
PSU: PCYES 600W 80plus
Storage: 1xSSD Kingston 120GB, 3xHDD 5400RPM 500GB

Thanks for reading that long text and willing to help!

 

[Rdslw]

might be ram compatibility issue ? each stick have rom that does say to mobo at what speed your ram will work.
MAYBE your mobo takes that from bots sticks, and cannot find working state that would be fine for both sticks.
If you load one of them, then mobo configures the "speed set" from one stick, and possibly it stays like that when you insert second one. second stick seems to be fine with the speed, but does not advertise it.

 

[Renato2005]

might be ram compatibility issue ? each stick have rom that does say to mobo at what speed your ram will work.
MAYBE your mobo takes that from bots sticks, and cannot find working state that would be fine for both sticks.
If you load one of them, then mobo configures the "speed set" from one stick, and possibly it stays like that when you insert second one. second stick seems to be fine with the speed, but does not advertise it.

Hi Rdslw,

It makes sense. Is there some kind of manual configuration I could do or should I try to test booting with a new pair of memory sticks?

Also, I forgot to list on the original post that I noticed that sometimes the the date/time is wrong on BIOS, even after changing the CMOS battery... would that be related to the problem? How could I fix it?