I recently moved into a house in Vancouver that's quite old (built in 1945), and I've been warned that using too much electricity in the bedrooms can trip the power. All three bedrooms are on the same circuit, and I'm planning to mainly stay in my room. I built a powerful gaming PC (5090 and 9950x3d), but I'm concerned I can't bring it because it might use too much power. I suspect the bedrooms are on a 15A circuit, which can handle about 1400w-1800w max. The other rooms are probably using a couple of laptops, some fans, and lights. I'm considering downgrading to a 9800x3d and 9070xt, but I'm worried that if my PC spikes to 1000w while other people are also drawing power, it might trip the breaker. What can I do to prevent this?
4 Answers
I did a quick power draw estimate for your original setup; it looks like it’d be around 889w, so rounding up to 1000w is smart for safety. Downgrading to a 9800X3D should help reduce demand. Consider undervolting both your CPU and GPU if you mostly game—that could help keep consumption down without sacrificing too much performance.
Your setup could trip the breaker, especially if you have old incandescent lights sucking up power. Assuming everyone else uses efficient devices, you might still have around 1000W available. If you do trip it, just apologize and reset. Generally, when not gaming, your PC won’t pull maximum wattage, so it’s manageable. Consider underclocking and disconnecting anything unnecessary to help too! You can also monitor your usage with a plug like the Shelly Plus.
While downgrading does lower peak power use, keep in mind that the efficiency can actually decrease. For example, a 5090 might draw 300 watts but still perform much better than a 9070XT. Also, the efficiency of your power supply matters. If possible, it might be worth investing in an electrician to install a new circuit for peace of mind.
Ordinary breakers usually don’t trip from brief power surges—like you might be safe drawing more than 15 amps for short moments. Just be cautious: a house that old might still have fuses instead of modern breakers, which are less forgiving about overcurrent situations. Definitely check on that!
Thanks for the heads up! I’ll ask if they have fuses.
I can’t afford any circuit upgrades since I’m just renting!