1 long and 3 short beeps, no display output, but boots fine if plugged into iGPU and GPU works fine after boot

[UltimativLunzer]

Hey,
my PC won't boot if my display is plugged into the MSI GPU, I get 1 long and 3 short beeps (which should indicate that I have a GPU error). If I plug into the iGPU (via the motherboard), my system boots and I can switch on runtime to the MSI GPU (by replugging) and everything works fine. Even if I shutdown my system and power it back up (still plugged into the MSI GPU) everything works. Only when my system is of for a couple hours (System was plugged into power the whole time) I get the same GPU error and I can only boot when plugged into the iGPU.

I already looked up if my NB Configuration in the BIOS is messed up, but everything seems fine (generally the BIOS has the default config loaded): [SEE ATTACHED IMAGE]

Thanks in advance and have a nice day!

Specs:

OS: Windows 11 Home 64 bit

CPU: AMD Ryzen 7 7700X

MOTHERBOARD: Asus PRIME B650-PLUS (BIOS Ver.: 1654, latest)

RAM: Corsair DIMM 32 GB DDR5-5600 (2x 16GB)

AIO: Corsair iCUE H100i ELITE CAPELLIX

SSD: Samsung 990 PRO 2 TB

GPU: MSI RTX 3070 GAMING Z TRIO

POWER SUPPLY: Seasonic Focus GX 850 W ATX 2.4

[Robchil]

try to reinstall vbios.. sounds like it doesn't manage to hook up when booting. 

 

[UltimativLunzer]

21 hours ago, Robchil said:

try to reinstall vbios.. sounds like it doesn't manage to hook up when booting. 

 

Today I turned on my pc (plugged into the MSI GPU) and I got again the same error (1 long and 3 short beeps), but this time my pc booted just fine after a couple seconds. (Normaly it wouldn't boot. Even after multiple minutes)
I have tried to replicate the error multiple times, but it only happend when I tried to turn the pc on at the very next day.
The VBIOS is the latest version, could a reflash really solve the wierd issue?

[Robchil]

40 minutes ago, UltimativLunzer said:

Today I turned on my pc (plugged into the MSI GPU) and I got again the same error (1 long and 3 short beeps), but this time my pc booted just fine after a couple seconds. (Normaly it wouldn't boot. Even after multiple minutes)
I have tried to replicate the error multiple times, but it only happend when I tried to turn the pc on at the very next day.
The VBIOS is the latest version, could a reflash really solve the wierd issue?

is the PCIE  power cables on the PSU side properly seated? 

it can if that's the problem.