Hey everyone, I need some advice on troubleshooting my brand new RTX 5080 graphics card. After setting it up, I started experiencing mouse lag and stuttering on the desktop. Then, whenever the GPU is under load, my PC would black screen and reboot. I've already tried a bunch of things: updating drivers, re-seating cables, testing different monitors, and even doing a fresh Windows install. I took it to a local IT repair shop where they suggested it might be a faulty GPU. They used DDU to reinstall the drivers, but when I sent the GPU back to the supplier, they claimed it passed their stress tests and sent it back to me. Interestingly, I reinstalled my old 3060 Ti and didn't encounter any issues. Now I'm wondering if it could be the power cable causing the problems, and I'm curious whether the repair shop actually tested the GPU in their setup or just left it in mine. Any thoughts or suggestions on what I might try next? Here are my PC specs:
* Gigabyte B660 DS3H AX DDR4
* Intel Core i5-12600KF | 4.9 GHz | 10 Cores 16 Threads
* Gigabyte Geforce RTX 5080 Windforce SFF 16G
* 32GB G.Skill Ripjaws V 3600MHz (2x16GB)
* 1TB Kingston NV2 M.2 NVME
* 850W be quiet! Pure Power 11 - 80+ Gold - Modular
* (previous card: Gigabyte RTX 3060Ti Gaming OC V2 - 8GB)
3 Answers
Make sure your RTX 5080 is properly connected to the PSU. The 3060 Ti draws about 200W while the 5080 pulls around 360W, so that difference can cause issues if the cables aren't seated correctly or if the adapter isn’t functioning properly. Also, I'm a bit curious—if you used the 3060 Ti while the supplier was testing the 5080, how could the shop determine if the 5080 was faulty in your configuration? That might be worth clarifying.
Check your Nvidia application settings and make sure they're set to default. Forcing specific settings can sometimes cause crashes in certain games. Just something to consider!
I haven't changed anything in the Nvidia app settings; they should all be on default. What specific settings do you think could be an issue?
Have you tried changing the PCIe setting to Gen 4 in your BIOS? Sometimes that can help with compatibility issues. It's worth a shot!
I had to use a 12VHPWR PCI-E adapter that splits into two 8 pins for the PSU. I've double-checked the seating of everything too. Just to clarify, I used the 3060 Ti while the GPU was being tested by the supplier, not the local shop.