I'm upgrading my PC with a new 5080 and 9800X3D. I've also got an RGB Hub, one SSD, two HDDs, 32GB of RAM, and AIO water cooling. Right now, I'm using a Seasonic G12 GM 750W power supply. Do I need to move up to an 850W or higher power supply? My brother recently upgraded his setup from a Ryzen 3600X and 5700XT to a Ryzen 5700X and 9070XT but has been experiencing grey screen crashes with blue vertical lines, which might be a power supply issue. I'm thinking of giving him my current power supply if I need a stronger one. Any advice?
4 Answers
You both should really consider getting new PSUs. Your current one would be suitable for your brother’s needs. It's important to get an ATX 3.1 PSU that works well with modern GPUs, especially since the 5080 can require up to 1000W when accounting for power spikes.
How old is your current PSU? If you just bought the 750W model in late 2025, it might still run fine, although it was made in 2024. Upgrading to a high-end CPU and GPU while sticking with an older PSU can lead to issues, so just keep that in mind.
Try using PCPartPicker to calculate the wattage you need. When I entered your CPU and GPU, it estimated around 480 watts, but it's best to keep your usage under 80% of your PSU's capacity for reliability.
Yes, you definitely need to upgrade your power supply! The minimum requirement for the 5080 is at least an 850W PSU. I've got the same setup with a 9800X3D and 5080, and I use a Corsair RM1000X, which works perfectly for me.
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