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Rx295x2 8 pin power melted

Kd4lif3
By Kd4lif3
in Graphics Cards
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Go to solution Solved by -rascal-,
5 minutes ago, Kd4lif3 said:

Fr? It has a 500 watt tdp. I knew that going in and figured that 800 should work if it was dedicated to the card alone.

 

I don't recall the exact model but it is a Roswell 800 watt. Relatively new.

 

We would need to the exact model...

"Rosewill 800 watt" is like saying "Toyota 4-door car with an engine..."

 

From the looks of the damage, the problem started at the PSU end.

The PCI-E connector / wires are are not rated for such high current.

Too low of a current rating, and the wires runs HOT, melting the plastic.

The melting plastic on the PCI-E connector, then starts melting the PCI-E sockets on the GPU side, since they are connected.

Posted

I recently picked up a used r9 295x to mess around with but I ran into some issues when both 8 pin connectors on the card and the cables inserted into them melted. I was away from home and I had the card under a mining load. My dad messaged me that he smelled smoke and he had to shut the computer off. I checked my nice hash monitoring app which is on about a 5 minute delay. This told me that the card was running at about 68 degrees right up until it was shut off so it was not overheating. I had the card on a separate 800 watt power supply from what my system runs on so I cant rule it out as a variable as the rest of my system was fine. I tore the card down and found absolutely nothing indicating a short on the pcb. Does anyone know what might have caused this issue? My parents are understandably pissed but does anyone know if there was any actual risk of fire or would the system have hit a failsafe after the cables melted? I have attached a few photos of what the damage looks like below

.IMG-3503.thumb.jpg.63df285b892afc19a482c69ae55c8d51.jpgIMG-3504.thumb.jpg.b19da739ee313edeb9434449f1f946f0.jpg

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were the 8-pin connectors on separate cables?

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Just now, Herman Mcpootis said:

were the 8-pin connectors on separate cables?

Yeah to clarify the cables were not split or daisy chained. These were two separate cables from two separate 12v ports on the psu.

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99.5% your PSU. 295X2s have very, very specific requirements for the power supply connected to them, and failure to get something that checks the boxes they give could result in exactly what you see there.

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A quick trip to google says you are under powered and should be using 850-1000w..

 

That card is such a pig, I am impressed.

 

https://www.guru3d.com/articles-pages/amd-radeon-r9-295x2-review,12.html#:~:text=Here is Guru3D's power supply,power supply unit as minimum.

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As others have said it's most likely your PSU. Those cards needed a ton of available power.

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11 minutes ago, freeagent said:

A quick trip to google says you are under powered and should be using 850-1000w..

 

That card is such a pig, I am impressed.

 

https://www.guru3d.com/articles-pages/amd-radeon-r9-295x2-review,12.html#:~:text=Here is Guru3D's power supply,power supply unit as minimum.

Fr? It has a 500 watt tdp. I knew that going in and figured that 800 should work if it was dedicated to the card alone.

 

41 minutes ago, FakeKGB said:

Which exact PSU was the card running off of?

I don't recall the exact model but it is a Roswell 800 watt. Relatively new.

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5 minutes ago, Kd4lif3 said:

Fr? It has a 500 watt tdp. I knew that going in and figured that 800 should work if it was dedicated to the card alone.

 

I don't recall the exact model but it is a Roswell 800 watt. Relatively new.

 

We would need to the exact model...

"Rosewill 800 watt" is like saying "Toyota 4-door car with an engine..."

 

From the looks of the damage, the problem started at the PSU end.

The PCI-E connector / wires are are not rated for such high current.

Too low of a current rating, and the wires runs HOT, melting the plastic.

The melting plastic on the PCI-E connector, then starts melting the PCI-E sockets on the GPU side, since they are connected.

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13 hours ago, -rascal- said:

 

We would need to the exact model...

"Rosewill 800 watt" is like saying "Toyota 4-door car with an engine..."

 

From the looks of the damage, the problem started at the PSU end.

The PCI-E connector / wires are are not rated for such high current.

Too low of a current rating, and the wires runs HOT, melting the plastic.

The melting plastic on the PCI-E connector, then starts melting the PCI-E sockets on the GPU side, since they are connected.

Right that makes sense. I looked at a compatibility list and it seems like the only listed power supplies are 1000 and 1200 watt units. I guess this is logical but I never would have thought to research this seeing as pc hardware compatibility tends to be pretty forgiving usually. 

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14 hours ago, Kd4lif3 said:

I don't recall the exact model but it is a Roswell 800 watt. Relatively new.

What rosewell? They have dumpsterfire stuff and decent stuff. If you ended up using a bad unit then well yeah logically a stupid high power consumption card like a 295 is going to end that psu.

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