12V-2x6: Seven Melted RTX GPUs in Two Days
By Indie Kings | October 21, 2026
Updated October 21, 2026: A Chinese repair channel says it received seven Nvidia GPUs in two days with burned or melted 12+4-pin power connections, mostly RTX 5090s. The report lands as Super Flower lists a $38 inline OCP dongle that monitors current across the 12V lines and triggers a black screen when the load stays too high.
Super Flower VGA 12+4Pin OCP Dongle. Credit: Super Flower.
The repair report
PC Gamer reported on October 21 that the channel 修电脑的张哥, roughly Zhang the Computer Repairman, posted a video after receiving seven cards in two days with damage at the 12+4-pin power interface. The cards were mostly RTX 5090s, with Asus and MSI RTX 4090s, a Gainward card and a Founders Edition RTX 5090 also in the mix.
The damage was not cosmetic. Some cards had a burned socket and a blackened PCB. On others the connector had melted into the socket, forcing the owner to cut the cable before sending the card in. Zhang removed the damaged interface, cleaned the contacts, soldered on a new 12+4-pin socket and tested each card with 3DMark. Some cables at the power supply still ran warm, but he did not flag them as dangerous after the repair.
One repair shop is not a failure rate. The channel is popular on Bilibili and YouTube, so it may attract more damaged cards than a typical shop. The users were not all running weak power supplies, and some cards came from lab computers that may have been worked harder than a home gaming rig. Even with those caveats, seven cards from several manufacturers in two days is a pattern worth watching.
| Reported failures at one Chinese repair channel | Detail |
|---|---|
| Cards received | Seven in two days |
| Models | Mostly RTX 5090; Asus and MSI RTX 4090; Gainward; Founders Edition RTX 5090 |
| Failure point | 12+4-pin cable and GPU socket interface |
| Damage | Burned socket, blackened PCB, or connector melted into the socket |
| Repair | Remove the old interface, clean contacts, solder a new socket, test the card |
Source: PC Gamer, October 21, 2026, citing the repair channel's video.
Why the connector fails
The 12V-2x6 connector, often called 12+4-pin, is the power interface on high-end Nvidia cards. It carries up to 600W through a small set of contacts. When one pin makes poor contact, the current that should spread across the bundle concentrates in fewer paths. Resistance rises, heat rises, and the plastic housing or the PCB around the socket can burn before the card reports a fault.
PC Gamer's report is careful about the cause. The failures are not purely down to cheap adapters, old power supplies or cables that were not fully seated. The amount of power running through these cards is enough to damage the connector when the contact is marginal. That is why the same failure shows up across different board partners and different card models.
The connector can also fail slowly. A card may boot and run games while the socket is already discolored or the cable is running hot. By the time the user notices a crash or a smell, the damage may have moved from the cable to the card. The repair is possible, but it is a board-level job, not a cable swap.
Super Flower's OCP dongle
Super Flower has listed the VGA 12+4PIN OCP Dongle, a device it first showed at Computex 2026. It sits between the power supply cable and the GPU and monitors current across the individual 12V lines. An ARGB light and a buzzer provide the warning. The company published the thresholds on its product page.
| Current condition | Alert | What happens |
|---|---|---|
| 9.5A to 12A, or more than 6A difference between any two 12V lines, held for 10 seconds | Orange LED and rapid short beeps | Warning clears if current returns to normal |
| More than 12A, held for 10 seconds | Red flashing LED and continuous alarm for 180 seconds, then solid red for 15 seconds | VGA Black Screen Protection triggers; shut down and inspect the GPU power connections |
| Price and availability | NT$1,190, about $38 | Currently bundled with LEADEX VIII PLATINUM PRO PREMIUM power supplies; not sold separately yet |
Sources: Super Flower product page and VideoCardz, October 21, 2026.
VideoCardz reported that the dongle is listed at NT$1,190 in Taiwan, or about $38. It is currently offered as a promotional gift with Super Flower's LEADEX VIII PLATINUM PRO PREMIUM power supplies in 850W, 1000W and 1200W versions. The company has not said when it will be sold separately or whether it will reach markets outside Taiwan.
The category is growing. VideoCardz notes that Cooler Master's $50 GPU Shield Adapter and Thermal Grizzly's WireView Pro II also monitor the GPU power connection. The Super Flower unit is notable for its low price and for the black-screen trigger, which is more aggressive than a light or a log entry.
What it can and cannot do
The dongle can catch a sustained overload or a large current imbalance and force the display to cut out before the connector cooks. It cannot fix a loose connection, a damaged cable or a socket that is already worn. It also cannot tell you why the current is high. It is a warning and shutdown trigger, not a repair for a bad contact.
The 180 second alarm and 15 second solid red period are deliberate. They give the user time to see and hear the warning before the black screen. The protection state remains active even if the current returns to normal, so the system does not silently resume after a fault. Super Flower's instructions are to shut down and inspect the connections before restarting.
The price is easier to justify than a new GPU, but the bundle-only launch limits who can buy one. If the dongle becomes a standalone product at $38, it will be one of the cheaper ways to add per-line monitoring to an existing card. Until then, most buyers will have to rely on the card's own sensors and a visual check.
What owners should check
Zhang's field advice, as reported by PC Gamer, is to touch the cable about an inch above the GPU connector during use. Warm is normal. Notably too hot to touch is a warning sign. He also suggests watching the 12+4-pin voltage readout in GPU-Z. If the voltage drops well below 12V, to 11.3 or 11.4V, there is likely a problem and the connector should be checked.
The touch test is a rough field check, not a measurement. A better routine is to power down, reseat the cable at both ends, listen for a positive click, avoid tight bends near the connector and inspect the housing for discoloration. If the cable or socket is already damaged, stop using the card and have it repaired.
A lower power limit can reduce the current through the connector, but it does not fix a bad contact. The same goes for a new cable: it may restore a solid connection, but it will not help if the card's socket is worn. The failure is a system problem, not a single accessory problem.
Our take: the most useful part of the repair report is the mix of vendors. Seven cards from Asus, MSI, Gainward and Nvidia's own Founders Edition suggests this is not one partner's cable or one bad batch. The least useful part is treating seven cards as a rate. We do not have a denominator, and a popular repair channel is not a random sample. The right response is to check the connection, not to panic about every RTX 5090.
FAQ
What happened at the repair shop?
A Chinese repair channel reported receiving seven Nvidia GPUs in two days with burned or melted 12+4-pin power connections. Most were RTX 5090s, with some RTX 4090s and cards from several manufacturers.
Is this a widespread RTX 5090 failure?
The report does not establish a failure rate. It is one repair channel's two-day intake, and the channel's popularity may bring in more damaged cards than a typical shop. The mix of vendors is notable, but the sample is small.
What is the 12V-2x6 connector?
It is the 12+4-pin power connector used on high-end Nvidia cards, rated for up to 600W. The 12V-2x6 name refers to the 12V rails and two rows of six power contacts. The extra four sense pins are why the same connector is often called 12+4-pin.
What does Super Flower's dongle do?
It monitors current across the individual 12V lines and warns at 9.5A to 12A or a 6A imbalance. Above 12A for 10 seconds, it alarms and eventually triggers a black screen so the user shuts down and inspects the connection.
Can I buy the dongle separately?
Not yet. VideoCardz reports that it is currently bundled with Super Flower's LEADEX VIII PLATINUM PRO PREMIUM power supplies at NT$1,190, about $38, with no standalone sale date or international availability announced.
What should I check on my own GPU?
Check that the cable is fully seated at both ends, inspect for discoloration and feel the cable about an inch above the GPU connector during use. If it is too hot to touch or the 12+4-pin voltage drops to 11.3 or 11.4V, shut down and inspect the connection.
Bottom Line
Seven melted or burned connectors at one repair shop in two days is a warning, not a verdict on every RTX 5090. The 12V-2x6 connector runs close to its limit on a 600W card, and a marginal contact can heat up long before the card reports a fault. Super Flower's $38 OCP dongle adds per-line current monitoring and a black-screen trigger, but it is bundled with a power supply for now and cannot repair a bad connection. Check the seating, the heat and the voltage before the damage reaches the board.
Related: ElmorLabs PMD2X Monitors Every 12V-2x6 Wire for $109 [2026].
Sources: PC Gamer, October 21, 2026; Super Flower VGA 12+4PIN OCP Dongle product page; VideoCardz, October 21, 2026. All sources fetched October 21, 2026.