(PROBLEM SOLVED) The system frequently powers down during heavy tasks yet remains stable under lighter conditions.
(PROBLEM SOLVED) The system frequently powers down during heavy tasks yet remains stable under lighter conditions.
I'll search for the cables first, then consider purchasing a new PSU.
Earlier conclusions were only partially accurate. Corrections have been made. I didn’t add a second PCI-E cable, but my PSU was ATX2.4. The fix involves connecting two PCI-E cables from the PSU to the GPU. Run the game or use FurMark for at least 25 minutes; if it crashes again, the problem is resolved. Also, my PSU isn’t ATX3, so I replaced it with a 1500W Corsair unit that’s performing well. Verify your PSU supports ATX3—usually you’ll find this info on the product page. If not, consider a different PSU, especially if you need 4000 series GPUs; 1000W should usually suffice. Additionally, ensure fans are installed properly, as incorrect placement can cause sudden shutdowns. Thanks to @Aaron_T for the guidance. Updated December 25, 2023.