When a PC gamer's GPU with a 12VHPWR or 12V-2x6 power connector melts, it's often in a computer they built by hand, and they typically only have one chance at recourse — hoping their GPU is under warranty and making a claim.But it ends up that when someone else built your PC, it could open up a can of worms that has two companies pointing the blame at each other while a customer sits with a burned-up RTX 5090, power supply, and power cords.That's what happened to Tom's Hardware reader Anthony DeMarco, whose father purchased a Digital Storm Corsa for him ahead of his first job after graduating from college. DeMarco says he suggested his father purchase the system before RAM prices went up. The system was delivered in May of 2025. DeMarco says he tested the system, then packed it up for when he got a job. That jealousy-inducing system included an AMD Ryzen 9 9950X, 2TB Crucial T700 Pro SSD, 64GB of Kingston Fury RGB RAM, and, crucially, an Nvidia GeForce RTX 5090 from PNY. The computer cost $5,245.00 before tax.DeMarco says he got the computer from his father in August 2026, upon starting his job. He says the problems started two weeks later. "I noticed a strange burning smell from near my computer," he recalled to Tom's Hardware, wondering if it was an issue with dust from another PC he owned. "The next day I noticed my monitor screen kept flickering. I then used Claude to try to figure out the issue and it pointed to the GPU, and then I checked the wires and noticed them very melted and burned. I immediately powered off my computer so hopefully my GPU is still functional."But that's hard for him to tell. The cable was "fused" into the connector, and while he managed to separate the pieces, some of the connectors are still stuck together.The damage went beyond the GPU, with the "most severe" damage at the power supply, a 1,000-watt semi-modular model from Digital Storm with an 80-Plus Gold rating. This is the cheapest, default option you get when you pick an RTX 5090 on the Corsa configurator, though his PSU cables are an upgrade with custom blue sleeving. "The cable into the power supply is completely melted and the cable head is completely fused into the power supply with bare wires exposed at both ends of the cable," he said.DeMarco claims that he checked that all the cabling was in place after his father formally gave him the PC.Pictures of the damageThe photos that DeMarco sent us are brutal. Perhaps the worst are the photos of the ends of the power cable, which are wrecked on both ends. But there's burns on the cable itself, too. The part going into the GPU appears to have some sort of bend, though we don't have many photos to judge perspective.Anthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoAnthony DeMarcoWho do you go to for help?DeMarco had two options to go to for help. Digital Storm, which built the PC, and PNY which made the GPU.This is where buying the system early bit DeMarco. Digital Storm offers a one-year warranty on parts and three years on its labor, and that one-year warranty on parts was up. But the components are separately supported by manufacturers, and PNY warranties its GeForce RTX gaming GPUs for three years.He went first to Digital Storm, raising a support ticket under his father's name on Aug. 26, according to records Tom's Hardware reviewed. He later uploaded photos. That ticket was closed on Aug. 31 following a phone call, a summary of which explains that while there is a "faulty 12VHPWR cable that melted" that DeMarco would attempt to RMA (Return Merchandise Authorization) with PNY, the GPU vendor, due to being "Due to being far out of warranty." DeMarco also claimed on the call that he could get the GPU fixed at a repair center to replace the power connector on the GPU.On Sept. 8, DeMarco had a back and forth email chain with PNY, requesting an RMA of the GPU and highlighting the 3-year warranty. He also inquired if PNY offered a repair service for his existing GPU. Following supplying the receipt and photos of the damage, a PNY service representative said there was an issue with the fact that Digital Storm had used its own cables. "We want to clarify an important part of the warranty regarding the power connection to the GPU. All PNY GPUs that require a 16-pin (12VHPWR / 12V-2x6) input include a PNY-approved power cable or adapter in the box. This cable is the only configuration covered under warranty," the PNY support rep wrote. "If a third-party power cable, adapter, or PSU cable is used and damage occurs — including melting, burning, overheating, or deformation of the connector — PNY cannot accept the product under warranty. Damage caused by non-PNY cables falls under the responsibility of the manufacturer of that cable or power supply.""We are always happy to help with any PNY-related issues," they added, "but in cases where the damage was caused by unsupported cabling, we are unable to process an RMA."DeMarco responded with a series of questions. Does PNY publish a list of approved cables? Is the bundled adapter the only supported configuration, and not an ATX cable included with a PSU? Are system builders covered when they use PNY's cables?The answers to the first two (no, and not automatically) don't change much. On the third, PNY's rep wrote that machines from authorized system builders are covered, it doesn't mean their cabling is.Without knowing what else to do, on Sept. 16, DeMarco filed a report on the Consumer Product Safety Commission SaferProducts.gov database."PNY stands behind its GeForce RTX graphics cards, including those sold through our authorized system builder partners," the company wrote in a statement to Tom's Hardware when asked about its policies. "We are presently reviewing this case and will be engaging the customer directly. PNY’s ongoing commitment to its customers includes providing clear terms, policies and processes, and making adjustments where appropriate."Digital Storm did not respond to requests for comment.DeMarco then asked if PNY has a repair service he could pay for out of pocket (they do not), and then came to Tom's Hardware with his plight. He had seen another story of PNY rejecting an RMA for using a cable that came with their power supply — an ASRock rated for 1,600 watts. In Digital Storm's warranty, it says that "After the first year, Digital Storm will help replace any defective parts for the customer as long as those parts are still under warranty with the manufacture [sic]." DeMarco says Digital Storm said that because PNY had denied him, there was no use getting involved, but there is no corroborating record of this.What does he want? What should he get?If it were up to DeMarco, he wouldn't get another GPU. He'd get a refund for the component:"In an ideal situation I would get a refund for my PNY RTX 5090 instead of [having] it replaced because I do not feel safe leaving my computer to run anymore without me if it has a PNY RTX 5090 in it."In his email, DeMarco writes that there is a "a known problem with the PNY RTX 5090 power connector melting that is happening to many people." In this area, he's incorrect, at least when it comes to PNY. There have been plenty of reports over the years of GPUs with a 12VHPWR connector that have melted across both RTX 4090 and RTX 5090 graphics cards, and many of those are other brands. This is a widely known issue with the connector, which is standardized by the Peripheral Component Interconnect Special Interest Group, or PCI-SIG. In 2022, PCI-SIG sent a notice to members about the connector, ensuring they test for safety and help avoid user error.If DeMarco were to get a refund and turn around and buy an RTX 5090 from another manufacturer, it's possible he could see the same fate. Digital Storm doesn't guarantee a PNY RTX 5090. "Digital Storm will use a top brand name graphics card from the likes of ASUS, PNY, MSI, etc... An example would be the ASUS TURBO series," the website reads.One could say that either company could step up and help DeMarco out as a way of engendering goodwill. PNY's warranty isn't specific about which power cable you can use, though reviewing other GPU vendors' policies leads to an equally mixed bag. MSI's is more specific, stating that the warranty can be voided based on "any breakdown or damage caused by the use of parts or software not authorized or recommended by MSI[.]" Asus' warranty has similar vague language to PNY's. PC building is often a hobby where parts from various manufacturers are used.In most cases, going to Digital Storm would be the obvious answer. But DeMarco and his father let the expensive system sit in a box for over a year. While he was right to test it out of the box to make sure it worked, a gesture of goodwill buying in advance ultimately backfired when it ran out the clock on the warranty, and the system builder doesn't seem to have any further obligation here.What should you do if you buy prebuilt?When you build your own PC, it's up to you which power cables you use. When you buy one elsewhere, that's on them.Reviewing the warranty for every single component in a system (if you even know it — DeMarco didn't know which GPU he was getting here) is onerous. But reviewing the single warranty from any system builder could give you an understanding of how much support you might get in the future. Alternatively, if you're really worried, you could buy a system from the company that makes the GPU and PSU, like Asus or MSI sometimes do. It's hard to blame the cabling when they chose it.If you're buying a gift, buying it in time for the recipient to get most of the warranty is the best idea, especially on an expensive purchase where parts can fail. Or, at the very least, you may want to purchase extended coverage.DeMarco says he checked all the connections. That's a good idea. You shouldn't have to do it, but better safe than sorry. While you're at it, you can also make sure the RAM and GPU are properly seated.What if I'm building my own PC?If you're building your own PC, you're handling each warranty individually. In theory, if you want to be extremely conservative, you could be sure to only use the PSU adapter that comes with most RTX 4090 and 5090 graphics cards: a 16-pin power connector that connects to four standard 8-pin PCIe power connectors, from the power supply.But that also eliminates a lot of cables that come from perfectly good power supplies that might eschew the need for adapters, making for cleaner, simpler builds.While DeMarco is out of warranty with Digital Storm, PNY's policies could be more representative of what PC building is really like. And so can Asus, MSI, Gigabyte, and anyone else who makes a GPU, including Nvidia itself. Perhaps, with the most expensive GPUs, it's time for companies to be putting both adapters and full on 16-pin ATX cables in the box.PC building is all about customization. And it seems the more custom you get, the less likely companies selling the most expensive GPUs are going to be flexible about helping to replace those parts if there's a problem, even, if, like the 16-pin connector, it's a possibility that could strike almost anyone.