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Igor's Lab figured out why NVIDIA adapters are melting!

Oct 28, 2022

Igor's Lab figured out why NVIDIA adapters are melting!

we're at it again ndxc Canvas monitors have more of what gamers want 1440p QHD Canvas offers a 165 Hertz refresh rate for the perfect balance of performance and resolution, while 1080p Full HD Canvas offers 240 Hertz for Competitive Edge both versions feature AMD freesync Premium One-millisecond response time and in-camera OSD configuration allow for specific configurations between games to see NZXT's full list of canvas monitors and monitor mounts. Follow the link in the description below. It's amazing how fast information travels. Digging a bit I'll put a link to this article below which is very informative um it pretty much pinned down the problem completely so this is the adapter.
igor s lab figured out why nvidia adapters are melting
If you haven't seen our first video, you probably won't because spoiler alert. we couldn't get the adapter to fail, but

Igor

had identified something that he suspected was going on here, but it's much worse than he suspected. or inside here, if you take a look, there's 12 power pins, so there's six 12 volt power pins, six ground, and then the four extra pins that make it a 16 pin on the sideband, the sidebands aren't important in this, but if you look, I only have eight wires going there, so when I looked at this, I said there had to be some sort of breakout block that would cut the PCB solder joint to convert these four wires in six wires on both sides.
igor s lab figured out why nvidia adapters are melting
However, that is exactly what is happening there. if we take a look at the photos here from

Igor

's article and again I highly recommend you go and look at this article and read it the problem doesn't have much to do with the power consumption of the card doesn't seem to have anything to do with the pin size because here's the other thing too: you make a video like we did and we have everyone and their moms communicate saying I'm an engineer or I work for microfit or I do this or I do that and the problem is this but each person that it is defined to say what the problem is is contradictory as being a contradictory contradiction to someone else saying what the problem is and everyone says that they are the ones who know, but what

Igor

discovered with the help of be quiet is the fact that it's a very very thin piece of sheet metal and they call it sheet metal when they say foil i think of aluminum foil which is very thin and flimsy but it's not it's just a thin flat piece of metal that you stick to solder the pins that go to the GPU side and then the four power wires and the foreground wires are either soldered together or two on their corresponding side which are then insulated from each other to distribute power across the pins now investigating the glitches it's always been noticed that the outer pins are the only ones that are the most burnt so if you look at this picture this is where I put I think I've now shown three or four pictures since our initial discussion of these glitches of people showing their the cards are starting to melt or have completely melted or people who had no idea they were

melting

until the most recent one said they had no idea it was

melting

until they pulled the plug out to reroute the cable because they saw the videos and he said i should probably wrap this wire and not have a bend in it and he pulls it out and has to melt the wire or no plug and no pin but like the key, the key plastic melted and then he was like what the hell he didn't even notice it until he took it out and that's where the danger arises so what

Igor

figured

out was it doesn't bend up and down like this that's a big problem which is what you were dealing with if it was bent side to side like this this is why you're noticing that the outer pins are the most melted because they would potentially break or break but create a crack or a break at the junction where the cable is found. that flat pcb pcb now i keep calling pcb it's not pcp it's just a piece of metal but it forces the wire to break there which means now one of these is no longer connected.
igor s lab figured out why nvidia adapters are melting
This is the fun part because of the way sideband sense wires work. 600 watts is available to you but now you have one of these completely unplugged and the cards are going to draw 450 anywhere between 300 watts or sorry 380-400 watts with similar raster load depending on your resolution and then as soon as you put it under any kind of ray tracing load the power goes up to over 400 watts now you're doing it with three wires where even though it was still 450 watts you now have a much higher resistance of power running through of that piece of aluminum that creates a temperature rise in the plug which leads to failure and what looks like it's happening is two of them are breaking so it looks melted on both sides because if you're bending it from this way like this you have the radio pulling on the outer wire and you have a couple of things going on here if we look at this wire right here on the inside of the spoke as i bend it over you can see it pushes on it but or you can break a solder joint by pulling and pushing so in a way I think what happens is that some people who are really burned out like the one that got a little fired up on Reddit might have broken both which means now you're up to 600 watts because the sense wires are still grounded and the ground is more than likely still good if that's not the one that broke and now pulls through two and that level of heat coming from just two wire two 14 gauge wire is a 14 gauge btw that's a scenario where the temperature can get high enough that in the outlets people start doing some crazy tests like it was Galax put something as well as 1400 watts through one of these through a load tester so they connect the wires and they're on a power supply l The additional tester thing they just drank the Watts and that thermal camera on it and it hit like 100 C at the plug in those conditions and it was starting to melt so if it takes 1400 watts to start putting enough heat through this to melt the plug wire through all the wires obviously not it takes a lot if the resistance is high enough with only two of these plugged in or even three because of a broken wire so this is what I'm going to do today and Paul uh Paul's Hardware also reached out to me because he's going to try to recreate as well this itself now that I have sacrificed this sacrifice this cable so I'm not going to use it I want to cut it and I want to see for myself what it is It seems that there it is very difficult to open it because this rubber is molded there.
igor s lab figured out why nvidia adapters are melting
I still stand by what I said in my previous video about you being pretty safe as long as you're using like where is where is this? guy here like this is the corsair replacement wire for the uh 4090 adapter the 12 volt high power so what they're doing here is they have one wire per pin so it's a dedicated ground wire for each pin that sits on the 12 pin side of the 16 pin plug six dedicated grounds six dedicated 12 volts and these are heavier gauge they are heavier gauge they are not solid core or as I thought they might have been they are a heavy gauge stranded or twisted wire so our stranded wire that's why this is a safe solution too Got me thinking because a lot of people ask is this plug that bad remember we were concerned about this part of the plug here it's not where our concern should be, is that part between the wires and the 12 volt high power plug.
igor s lab figured out why nvidia adapters are melting
What 30 series did these plugs have? All founders editions had these plugs. Why weren't they failing right if you look closely? it's essentially the same thing, the coding can be different just to make sure you can't use it no matter what you're rambling about, this was kind of like your introduction to the 12 volt high power plug and then the 16 pin sideband , I think that's where Intel kind of came in and said hey we should do something else with it and I think sideband came in these weren't failing even with the 3090 TI or the 3090 due to the fact that they were dedicated or by cable so they took something that was working and they made it not work right we have to cut this bad boy ok there's the deal soldered as you can see the one two three four soldered through this piece of aluminum underneath and that's where the six pins meet on that side the board they're soldered to is very thin so the thinness of that board carrying so much current increases the resistance and that extra resistance or Any resistance equals heat, so I want to point something out. as we're up to charge this and wait for the temp to stop rising we're at 47.5 C on The Wire right above the solder but I want to point something out right here is the broken solder pad that Questi was trying to remove the rubber so that showed how delicate his was.
igor s lab figured out why nvidia adapters are melting
We're noticing that the solder on mine doesn't look as gross as this one. That's pretty gross. As they open side by side, maybe a close up before we snap mine, but that's mine. it doesn't look too bad it broke which means these three wires here now are responsible for the six wires that need the voltage and the amps and the current going through them so I need to test this two ways I need to break the wire where you already want to break, but leave the pad attached and see if there is any change and then break the pad like he did.
It's starting to look like the flaw is in the build quality of the solder joints. This is built correctly. I would say it's just what

Igor

found is there's no room for mistakes if it's not like the soldering is bad oh my gosh this is such strange territory to be in because knowing there are some that might have this flaw ago that this is a scary situation, but obviously they are not. all so which is like any recall not all of them are like that like with the Asus motherboard backwards capacitor ours wasn't but a lot of them were and you can't deny it and say oh it's not a problem because you could recreate it obviously there are variants ok so first i have to do a little test to make sure it moves.
I do not have it now. I'm going to try ocp or over current protection on this if it was somehow now grounding on 12 volts if I flip this switch uh and turn on the power supply it should trip immediately and it didn't so we're good 60 degrees on the plug and that's exactly as expected because let's rewind a second here. I showed you

Igor

's pad broke completely Just pulling it apart from the bar what I essentially did by cutting the wire and having the pad still attached is just unplugging it like I wouldn't plug it in that fourth connector with my side cutters effectively doing nothing to the circuit in a negative way with the exception of tricking it into going to the 133 power limit, where if you were to unplug that wire because of the sense wire, you'd only be limited to 450, so it's well within the specs of the card and three wires are within 450 spec all right now the pad is completely removed so let's think about this here 61.8 on the outside of the plug which isn't that weird um the heat transfer from the pin through the plastic of the plug to the outside which is going to be a pretty terrible heat transfer until it's eventually hot enough to eat. or to start

melting

it down at the end of the day.

Igor

already did his assessment and I think it's very fair based on my limited knowledge and he knows a lot a lot more than I do about that kind of stuff so I think the problem has already been found it's just proving harder to recreate than I thought I was hoping ok lunch is about to be delivered and it's been hovering around the same temps 64.3 I think that's the highest I've seen it go and it's starting to drop the next logical thing here would have been to cut another wire but now we're getting into super weird territory of uh yeah I mean now we're forcing a failure and since

Igor

knows exactly where the flaws are in this it's just that it still feels like there could be a very specific set of circumstances that need to be met for the thing to fail now what i still have to do is pull take it out and see if everything looks good from whoever i feel like

nvidia

got these plugs seems to be very inconsistent the level of quality you get with soldering uh on across the board let's cut it nice that it actually broke without me it was going up and down and what h pops up if it goes sideways and gone look at that clean break i try I'm so worried about damaging the connector okay so we're actually at the highest temperature we've ever had and we cross it all good for any kind of smear of this plug that's not to say this isn't a problem but the universe doesn't want me to be able to recreate this, it's good, it's not so good, maybe Paul had more luck, I don't know if Paul isactually trying to run yours I think I could have opened it up to take a look inside but that's pretty much where we're going to have to end this issue

Nvidia

has requested that any of the cards they have told the aibs to as of this morning they were told any card that has this problem wants them for inspection but they need to look at the sockets as well not just the card in fact

Igor

and shut up even said they sent their findings to

Nvidia

and

Nvidia

really should be uh they should really be listening and if you're running a custom cable and so far there haven't been any reports of custom cables failing power supplies except I think rest assured someone showed a cable like the pin itself, which happened to me a million times on both Molex and PCI Express so I don't see it. to be so weird here but if you're running a cable that has a straight through pin wire like this and you don't use

nvidia

's bridge solution you'd be perfectly safe running a series 40 and not having a problem the problem isn't the connector the end of the problem is the way they built that monstrosity, that's it, we're done talking about this unless it somehow cures world hunger or cancer.
I have no more interest in talking about plugs, just don't use the adapter.
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