Hey everyone! I've got an EVGA SuperNOVA 650 G3 power supply (650W, +12V, 54.1A) that's currently paired with my 2080 Ti and a 5800X3D processor. I'm thinking about upgrading to a 5080 GPU but I'm curious if anyone here has done the same while still using a 650W power supply. Nvidia recommends a minimum of 850W for the 5080, but I estimate my system will only draw around 560W with this upgrade. I can also set the power target to 90% for now. What do you all think?
5 Answers
While Nvidia says 850W is the recommended minimum, I think you'll be okay with a 650W power supply. Just remember, the warning is mainly because they consider a high-end CPU like the 9950X, which draws quite a bit more power than your 5800X3D. It likely will work, but you might want to keep an eye on temperatures and stability. It's not a total gamble, but it’s close!
Your PSU might be running at a high load, but if it’s a quality unit like yours, it should handle it. If there’s an issue, the PSU will just shut down and prevent damage. It could definitely work, but prepare for the possibility of needing a bigger one later!
I've been running a similar setup with a 5080 and never had issues. My total system draw is around 530W even with the monitor and other things plugged in. I think a 650W PSU might barely cut it but you're really pushing the limits, so just be cautious! I've switched to a 750W PSU instead just to be safe.
I had a 3080 running fine for years on a 650W PSU, and the 5080 actually draws less power. As long as you have a solid PSU and consider a power limit, you should be fine. If it ever gives out, you can just upgrade to a higher wattage. Don’t stress too much over the recommendations floating around at times, they can be overly cautious!
With water cooling and that setup, I really believe you’re on the right track! If your PSU is high quality, you probably won't hit those limits often.
Honestly, I think it's a bit risky. Even if your 650W PSU can deliver enough power, it might not be able to sustain it at higher temps. Similar to pushing a car's engine too hard, you can do it, but it won't last forever. You might risk it failing at some point.
But what if the PSU heats up too much under load? Wouldn’t that increase the risk of damage?