[SOLVED] "No Signal" with ASRock 7900 XTX but PC works okay when using iGPU ?

[Giras]

Hello i just buy today an ASRock 7900 XTX Phantom GPU and yesterday had a 6800 X was worked just fine and today with new gpu no signal from gpu only over mobo with hdmi cabel , pls any suggestion , lights on gpu is on but even after restart fans dont spin on gpu , i tryed change , gfx configuration to auto , gen 4 ,gen 5 , but after every restart it seems igpu is working over mobo and i was disabled in bios and after restart it seems again enabled , just flashed bios , if i restart only signal goes from mobo but if restart not from gpu ? Pls help do u think new gpu is broken ?
spec
rm 850 psu
7800x3d
x670e steel legend
g.skill 6000 mhz expo settings 32 gb

 

[Lutfij]

rm 850 psu
How old is your PSU in the build?

You're underpowered per the GPU AIB maker's support/specification's site;
https://pg.asrock.com/Graphics-Card/AMD/Radeon RX 7900 XTX Phantom Gaming 24GB OC/index.asp#Specification

just flashed bios
What BIOS version are you on for your motherboard? Did you clear the CMOS after you'd verified that the BIOS was flashed successfully?

 

[Giras]

m8 asked in store is it enough for my build and tehy say yes , i think is 2 years old , but is corsair gold ver. /* i try clear cmos , removing batery . bios is today 2.02 and just flashed to 2.06 no change

 

[Giras]

rm 850 psu
How old is your PSU in the build?

You're underpowered per the GPU AIB maker's support/specification's site;
https://pg.asrock.com/Graphics-Card/AMD/Radeon RX 7900 XTX Phantom Gaming 24GB OC/index.asp#Specification

just flashed bios
What BIOS version are you on for your motherboard? Did you clear the CMOS after you'd verified that the BIOS was flashed successfully?

No i didnt clear cmos after flash..

 

[Giras]

Anyone know what i can try more ?

Ok , i just remove all cables from psu again and it seems one wasnt properly seated so gpu started woking fans spining , everything is ok , post resolved