I'm looking for some advice on whether my current power supply can handle an upgrade to a new GPU. I've been out of the PC building scene for over five years and I'm considering getting either a 9070XT or a 5070Ti.
Here are my current specs: I have a CPU 5800X3D, a GPU 3080, and a 650W Gold PSU that I purchased over six years ago when that wattage was thought to be adequate.
During a stress test using OCCT, my setup hits a peak power usage of 550W total: 320W for the GPU and 112W for the CPU, which gives me about 100W of headroom. I know that both the new options I'm considering are rated for lower power consumption than my current GPU, so logically it seems like I should be okay. However, I'm always cautious about having enough power for unexpected spikes. Am I good to go for this upgrade?
7 Answers
You should be good for the 5070Ti! I have a 5080 running on a 750W PSU with a 5800X, and it’s stable as a rock.
Honestly, it’s best not to push your PSU to its limits. If you can swing it, snagging a new unit with higher wattage would future-proof your build. If it’s been running close to max for six years, it’s definitely time for an upgrade!
I run a 5700X3D with a 9070XT on a 750W Gold PSU. Seriously, just go for the 750W or even an 850W if it’s not too expensive; it'll save you a lot of headaches. My friend had to roll back to a 9070 non-XT due to issues with his 650W setup.
Your PSU is likely lacking the necessary cables for those newer GPUs, and it may struggle with power spikes. A modern 750W 80+ Gold PSU will serve you much better, especially with high-end cards.
Just go for a 750W one; the 650W might be a stretch, especially for the 9070XT.
You're probably fine as long as your PSU is a reliable unit, but I’d recommend undervolting just to play it safe.
If you're dropping cash on a new GPU, you can definitely afford a new PSU, too!

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