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Check Your 4090's 12vhpwr Connectors To Make Sure They are in Pristine Condition

Soldato
Joined
29 May 2005
Posts
4,926
I'd hypothesises, because I'm not an electrical/electronics engineer, that the reason we've never see something like this happen before is because we've never pushed so much power through single wires/connectors. Unless I'm mistaken the most power on a +12V wire/pin is the EPS12V and that's 100W (afaik), 8pin PCIe is 50W per wire/pin, this 12VHPWR adaptor pushes 150W per wire/pin.
I do also believe this is the sole reason for the design.
 
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Soldato
Joined
29 May 2005
Posts
4,926
The community thought the issue was massively widespread. After several months once all affected cards were rma'd and numbers counted, it turned out the issue affected just 1% of cards sold.
1% is a manufacturing defect or an inherent product defect.

Currently I don’t believe it is a defect. Some post in Korea suggests 3 connector for 1500 sold in the country. And a couple are user error clearly. So it doesn’t seem to be a defect at manufacturing side tbh

Tho GN does make a very good point in that if the design is so poor that the resulting user error is more prevailing then that could be an issue.
 
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Associate
Joined
24 Sep 2020
Posts
90
While this originally looked like something with one simple cause, given the difficulty in replicating that, it might be more complex.

Many years ago, I did some work that looked at accident investigations. Some of these are really simple. "The pilot felt suicidal and flew into a hill." But those are the exception. A lot require different factors to all come together in the wrong way. A good example of this was the wreck of the MSC Napoli. You might remember this - big container ship that got in trouble in the Channel in early 2007 and ended up beached in Lyme Bay. Made the news because people descended on the beach and looted everything from nappies to motorbikes. The accident investigation found that the ship's hull tore itself down the middle because:

- It had been in an collision a few years earlier and, while it had been repaired, the centre of the hull wasn't quite as strong as it had been.
- It was in a storm whose heavy seas were making waves hit the ship at precisely the wrong frequency.
- The loading of containers on the deck had put too much weight at each end of the ship and not enough in the middle, creating torsion in the middle of the hull as the waves hit the ship..
- The automatic regulator that reduces power to the propeller shafts when they're partially out of the water to reduce vibration failed, so a crew member was put on duty regulating it manually.
- Said crewmember didn't speak the same language as the people working in that section of the ship and couldn't ask anybody to take over when his shift ended.

If just one of those things hadn't been true, the Napoli would have reached her destination and nobody would have realised how close we came to a shipwreck. But all of them were true, so the shipwreck happened.

And with the 4090s, we've got a load of factors in play, including:

- The make and model of the card.
- Whether the card is installed vertically or horizontally.
- The specific adapter shipped with it - 3x 8-pin vs 4x 8-pin and 150W vs 300W cables.
- Whether the cable is bent within 3cm.
- Whether the adapter has been plugged in perfectly.

If you sent a bunch of container ships into the Channel to see whether they broke up this would be a) a really stupid idea and b) a really bad way to diagnose what had gone wrong as you may never replicate the specific circumstances. I suspect only Nvidia themselves have enough of a sample size to work out what combination of factors is making things get burny.
 
Caporegime
Joined
22 Nov 2005
Posts
45,458
If you had a car with a defect which had even a small chance of causing a fire you'd be getting a recall notice.
no one is driving inside a gpu at 70mph along the motorway..

also 0 fires started..... look at the temp difference for plastic to melt vs ignite, ain't no PSU not tripping from that resistance
 
Associate
Joined
31 Dec 2010
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2,469
Location
Sussex
2) out of the burnt ones - it seems majority are due to user error ie not plugged in properly or severely bent
Even if that turns out to be true, of all the specs in terms of recommended PSUs etc , is there any official spec saying that to fit a 4090 your case should be 230mm or wider so as to leave 70mm or so at the side so the cable doesn't get bent?
Nevermind not requiring an ATX 3.0 PSU, specifying extra-wide cases would have really limited their audience.
There are more than a dozen listed in post #444 and I doubt everyone with a problem takes it to the internet.
Plus, Reddit is hardly the first place someone would post and even if others who come across forum posting forward the details there, quite a few would be missed.
 
Caporegime
Joined
22 Nov 2005
Posts
45,458
is there any official spec saying that to fit a 4090 your case should be 230mm or wider so as to leave 70mm or so at the side so the cable doesn't get bent?
you don't need 230mm to have clearance and no one has been able to get anything to happen from bending the cable anyway..

but lets pause reality and pretend that's the cause
 
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Soldato
Joined
7 Dec 2010
Posts
8,288
Location
Leeds
That's a 3090, not even a 4090. Stop trolling

Read the post and the spoiler.... It's clearly not a 4090 and EVGA didn't make them or sell them... :rolleyes:


It was a reply to arknor as he states pcs/gpus don't catch fire.. Video clearly shows a fire at the gpu.
 
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Caporegime
Joined
22 Nov 2005
Posts
45,458
It was a reply to arknor as he states pcs/gpus don't catch fire.. Video clearly shows a fire at the gpu.
yea and why is it on fire? and what's it got to do with 4090 adapters?


people just being hyperbolic as always... a plane could fall from the sky and land on you


Remember all those ferraris catching fire? could also happen to your house, go live in a cave in the woods?
 
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Caporegime
Joined
5 Sep 2010
Posts
25,572
no one is driving inside a gpu at 70mph along the motorway..

also 0 fires started..... look at the temp difference for plastic to melt vs ignite, ain't no PSU not tripping from that resistance
In arknor's world what more needs to happen before Nvidia takes some action?
 
Don
Joined
19 May 2012
Posts
17,404
Location
Spalding, Lincolnshire
both Bequiet and Corsair has take the approach of using 2 PCIE PSU end connection to power 600W 12VHPWR (16PIN) connector.


it is so interesting to see there is a clear divergence of standard for the new connector. or rather lack of unified standard the backward compatibility.

pulling 300W out of a PSU single VGA port is quite dangerous in all fairness - I have see PSU connector at the PSU end melt etc so not entirely sure what is going on there. personally I would go for a 3 PCIE 8pin solution rather than 2 or 4. 3 PCIE 8pin (given you are not using daisy chain pcie cable) should easily manage the 600W load. the cables and plastics are all rated for 288W at max 200W load per cable, it will be safe.

Pinout on the Corsair seems very weird compared to the type 4 unofficial spec

 
Soldato
Joined
6 Feb 2019
Posts
17,831
Cablemod has delayed the launch of the 90 and 180 degree adaptors due to not being able to make sure the design fits all the 4090 models on the market

They have published a list of models confirmed to work with the adaptor but they want to wait until they expand the compatibility list before launching

Confirmed cards that will work so far

  • ASUS ROG Strix GeForce RTX® 4090
  • ASUS TUF Gaming GeForce RTX® 4090
  • EK Quantum Vector2 Strix TUF RTX 4090
  • NVIDIA GeForce RTX 4090 Founder’s Edition
  • Gigabyte AORUS GeForce RTX 4090 MASTER
  • Gigabyte RTX 4090 Gaming OC
  • Gigabyte GeForce RTX 4090 WINDFORCE
 
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Associate
Joined
24 Sep 2020
Posts
90
It also seems the Cabemod right angle connector is only 12-pin to 12-pin... so no help at all if it's the dodgy 8-pin to 12-pin adapter that's the problem.
 
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