Question Installed New PSU and 4090 GPU, PC in a reset loop. Advice Needed

[Gorzul]

I have an ASROCK Z390 Phantom 9
i9-9900K
2 Sticks of Corsair ddr4
Corsair psu 860i
and 1080ti

This PC was working perfectly.

Now, I bought a 4090 Suprim X along with a Corsair 1200W PSU and a bigger case.

After replacing those 2 parts in the new case with the old parts, the PC went into a reset loop not even reaching bios.

Just on off on off.

Ive tried putting back the old parts, tried different PSU and GPU, tried no GPU, 1 Stick RAM at a time, removed CMOS to reset.

Nothing, still doing the same. Even when I revert back to the old parts.

Something somewhere went wrong.

Does anyone know what might have happened, and how it might be solved?

Much appreciated

 

[Cyberat_88]

You said you replaced the case ? Did you post with the new mix outside the case ?
Otherwise, any place along the way, you might've electro static zapped the MB.
When you reset CMOS did you pull the power cord out of the wall ?

 

[Gorzul]

You said you replaced the case ? Did you post with the new mix outside the case ?
Otherwise, any place along the way, you might've electro static zapped the MB.
When you reset CMOS did you pull the power cord out of the wall ?

Thanks for your response
Im not sure what you mean by post with the new mix outside the case.
Yes I moved the mobo with the CPU and rams on it into the new case, along with the new PSU.
jus took it out of one as is and moved it into the other case and plugged everything.
I believe with 90% certainty that the power cord wasnt plugged when I removed the CMOS, but it was yesterday and I cannot be 100% sure.
By zapped are you suggesting the board is dead, or is there a way to "unzap" it

 

[Cyberat_88]

Outside the case means on a mat, hopefully an anti-static mat, cardboard box works too.
Unzap not likely if fried, you can unplug & turn off PSU, leave it for 24hrs. that way.
If it doesn't come back on after another CMOS reset, it's gone. RIP

 

[Gorzul]

Outside the case means on a mat, hopefully an anti-static mat, cardboard box works too.
Unzap not likely if fried, you can unplug & turn off PSU, leave it for 24hrs. that way.
If it doesn't come back on after another CMOS reset, it's gone. RIP

ah no I didnt use a mat, I was personally grounded though and the pc had been unplugged for longer than 30min prior.
So according to you its for sure a motherboard issue?
And if so, only a static cause?

 

[Cyberat_88]

Am I to presume when you took out the MB you took out the CPU also ?
Ok, then maybe you bent some pins on the CPU as well, does that help ?
An undetected CPU would yield either power on errors or beeps.
Unless CPU is completely cooked, which does not make sense here.

 

[Gorzul]

Am I to presume when you took out the MB you took out the CPU also ?
Ok, then maybe you bent some pins on the CPU as well, does that help ?
An undetected CPU would yield either power on errors or beeps.
Unless CPU is completely cooked, which does not make sense here.

No I just took out the motherboard as is with cpu/cooler and rams still on it, and moved it to the new case, then plugged in the new PSU.
Could the new PSU have caused some issue? hopefully reversible.

 

[Cyberat_88]

If you didn't connect it to the motherboard, yes, it might be an issue. Though not a PSU issue.

 

[Gorzul]

If you didn't connect it to the motherboard, yes, it might be an issue. Though not a PSU issue.

No idea what you're talking about mate. of course I connected the psu to the motherboard.
In any case, thanks for your feedback.

 

[DSzymborski]

Did you re-use any modular PSU cables?