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PSU shorts with only 24 pin connected - need help

Strat
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Good evening.

 

I am super frustraded... I've just spent 20++ hours rebuilding my hard line waterloop and fitting a new RTX 3080.

It's been up and running for about 1 week. I prepared for a friday night of gaming but came to find my computer shut down. When trying to turn it on, it wouldn't. Of course, I immedietely checked for a water leak, but nothing...

When pressing the power button the PSU briefly spins up before I hear the relay clicking and power shuts off immediately. 

 

I want to check everything I can before draining the loop. I have done the following so far:

  • Unplugged everycable from mobo, GPU and PSU. The only cable left is the 24 pin to mobo. Still same problem.
  • Removed PSU and tested in a different system. Works fine.
  • Tried a known working PSU in faulty system. Same problem.

 

So far it seems that the problem is either CPU, GPU, RAM or mobo. To narrow it down I have to drain the loop. Everything is watercooled; full cover mobo waterblock, GPU waterblock and 2x watercooled quad channel ram...

 

Should I try anything else before I actually drain the loop?

It's such a large task and I'm so exhausted from building the system initially that I would like to try everything before I drain the loop 😞

 

 

Many thanks, and best regards from a sad gamer-dad who lost an increasingly rare friday night of gaming.

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The specs of the system?

So rise up, all ye lost ones, as one, we'll claw the clouds

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4 minutes ago, Radium_Angel said:

The specs of the system?

Asus X99-A

Intel 5920k

G.Skill 8x4gb DDR3000 ram

RTX 3080

Corsair HX1000i

 

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3 minutes ago, Strat said:

Asus X99-A

The reason I ask is you mention 24pin power, but didn't say anything about the 8pin connection, just wanted to see if you had that plugged in as well.

 

So rise up, all ye lost ones, as one, we'll claw the clouds

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1 minute ago, Radium_Angel said:

The reason I ask is you mention 24pin power, but didn't say anything about the 8pin connection, just wanted to see if you had that plugged in as well.

 

I have tried both with and without the 8 pin. Same result. Forgot to mention that.

 

With that said, I think the mobo should power on even with the 8-pin unplugged? At least my other mobo does that. Doesn't post though...

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1 minute ago, Strat said:

I have tried both with and without the 8 pin. Same result. Forgot to mention that.

 

With that said, I think the mobo should power on even with the 8-pin unplugged? At least my other mobo does that. Doesn't post though...

Some do, some don't...I'd leave both plugs plugged in.

I assume you've tried a BIOS reset by pulling the battery?

So rise up, all ye lost ones, as one, we'll claw the clouds

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9 minutes ago, Radium_Angel said:

Some do, some don't...I'd leave both plugs plugged in.

I assume you've tried a BIOS reset by pulling the battery?

Yes, I pulled the battery. No effect.

 

I searched for my motherboard in my gmail. Turns out I actually RMA'd 2 boards in a row when building the computer. Both where dead on arrival with similar faults as what I am experiencing now. I had completely forgotten, but that might be an important clue. Perhaps the board has a common issue. It's been running fine for 6 years, so I'm of course out of warranty.

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1 minute ago, Strat said:

Yes, I pulled the battery. No effect.

 

I searched for my motherboard in my gmail. Turns out I actually RMA'd 2 boards in a row when building the computer. Both where dead on arrival with similar faults as what I am experiencing now. I had completely forgotten, but that might be an important clue. Perhaps the board has a common issue. It's been running fine for 6 years, so I'm of course out of warranty.

Yeah, probably time for a new board then

So rise up, all ye lost ones, as one, we'll claw the clouds

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3 minutes ago, Radium_Angel said:

Yeah, probably time for a new board then

Yes, and thank you. I will drain the loop and troubleshoot the remaining components. Will update after.

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