Specs: Seasonic focus plus gold 1000w psu Powercolor red devil vega 64 Amd 3900x Gigabyte X570 Aorus Pro I had been dealing with some stability issues for the last couple of months and had been trying to rule various components out, switching out almsot everything while struggling to pinpoint the actual issue, but never actually touching the PSU since it never occured to me that it could be the problem. Long story short, yesterday I suddenly experienced a ton of graphical corruption and then the PC switched off, and I could smell a burning plastic smell. Looked into my pc case and (images spoilered due to size): Spoiler The cable from PSU to GPU was hot to the touch, had melted off the insulation at the PSU end of the cable, and had also melted some pins from the connector, requiring some serious tugging to separate. Thankfully I had recently ordered a psu for a NAS and I've been able to swap that in to keep my main rig going in the meantime. Doing some googling, I found this article from guru3d which notes that units with serial numbers from before Jan 18 could shutdown under heavy load. This matches up with what had been happening over the last few months, though I've not been able to find a way to tell the production date from the serial number. OcUK directed me to Seasonic for RMA due to it being purchased over a year ago (Aug 18), and Seasonic were quick to approve the RMA and send a shipping label, but I noticed that I have to cover the cost of shipping it back to them. So, I've got a couple of followup questions from what happened. Firstly, is it normal for the customer to pay the shipping cost to them? I wouldn't mind so much if it was the case of paying to ship it to them, and Seasonic then refunding the shipping cost if the unit was indeed faulty, but when a power supply literally melts, I feel a little miffed that I'm ending up out of pocket as a result. I've not prepared a box to ship it in yet, since I don't have the original packing to hand, but given the weight, I'm imagining it won't be too cheap to ship. Secondly, I'm a little concerned about the rest of my system. From some testing and benchmarking with this backup psu, everything does appear fine. The main component I would be worried about is the graphics card since it was the GPU cable that melted. As mentioned, it appears to benchmark ok, so I'm assuming nothing is wrong, but I'm a little concerned that down the line if it starts playing up, could it have been caused by the PSU dying like this? Or would the various protections built in to it have caught any danger and limited the damage just to the PSU itself? Thanks for your time and happy to answer any followup questions.