Question New mobo/cpu not booting because of intermittent VGA LED ?

[cifroes]

I upgraded my motherboard, cpu and cooler and it seemed like everything was OK but after a few days of usage I have a very annoying problem where the VGA led light on the mobo turns on and the system doesn't boot at times. After I remove the GPU and insert it again, sometimes it starts working.

The weird part is that if the system boots then it's pretty stable. I can stress test, run game benchmarks and nothing crashes. The problem is that if I leave it alone and come back the next day it won't boot at first.

System is:

• Mobo: Asus TUF GAMING B550M-PLUS
• CPU 5800x
• cooler: thermaltake peerless assassin 120
• GPU: RX 5700x
• PSU: Bitfenix Formula Gold 450W
• 4 sticks of Gskill 3600Mhz DDR4

Any ideas what could be causing the issue? The GPU is heavy and long, is it just not connecting properly to the mobo? It worked for years fine in a MSI B450M Pro-VDH I had before. Also don't thing the GPU is broken as when it boots, it works.

Could it be the PSU not having enough power for all the components? Previously I had a 2400G that is lower TDP.

Already tried removing everything from the case and tried to boot it that way but it seems it's even worse.

 

[rgd1101]

test with a better psu

 

[cifroes]

Thanks, unfortunately all my friends have 450W or worse PSUs :\


One thing to note is my RAM is 3600MHz and I'm running it at the XMP profile with that speed and 1.35V (and 4 sticks) Could that be the cause for instability and it's being misreported as VGA problems?!?

My old mobo couldn't handle the 4 sticks at that speed but I was hoping buying a good mobo from Asus would allow me that?

 

[cifroes]

Is it possible that the reason I'm getting the VGA problems led sometimes is because an underpowered PSU? I never had this experience of not having enough PSU and I thought it would just shutdown but can this be the cause for the problem?

could it be a faulty motherboard?

BIOS configuration / setting?

 

[NaClKnight]

Is it possible that the reason I'm getting the VGA problems led sometimes is because an underpowered PSU? I never had this experience of not having enough PSU and I thought it would just shutdown but can this be the cause for the problem?

could it be a faulty motherboard?

BIOS configuration / setting?

When you do get it to boot, have you ever run a stress test on it? Something like the PSU/Power test in OCCT will cause your GPU and CPU to both draw max wattage and will help determine if your PSU can handle it

With that said, 450W offers no headroom for the GPU/CPU combo. You're pushing it.

When you upgrade, i would focus on getting a well reviewed model with at least 650W. You don't need to go overboard but you do need more than you currently have

 

[cifroes]

When you do get it to boot, have you ever run a stress test on it? Something like the PSU/Power test in OCCT will cause your GPU and CPU to both draw max wattage and will help determine if your PSU can handle it

Thank you for the tip, didn't know that software.

Ran the Power stress test for 30 minutes and it's all good. CPU + GPU were reporting as drawing something like 300W.

Safe to say the problem isn't on the PSU? mobo faulty?