I'm getting back into building PCs and I've done a fair bit of research lately, but I'm still not clear on how to choose the right PSU wattage for my setup. I don't want to end up with something underpowered. I know options in the US are cheaper, but I'm in Denmark where prices can be higher. Here's my parts list:
- AMD Ryzen 7 9700x
- Corsair iCUE H150i RGB ELITE AIO (already own)
- Asus Tuf Gaming B650-Plus WIFI ATX AM5
- 32GB DDR5 6000 CL30 (2x16GB sticks)
- TEAMGROUP T-Force Cardea A440 2TB SSD
- Asus Prime OC Radeon RX 9070 XT
- be quiet! Pure Power 12M 850W
Any suggestions on wattage or if I should consider a different PSU?
2 Answers
A solid rule of thumb is to add up the thermal design power (TDP) of your CPU and GPU, then add about 50W for other components. For your setup, that totals around 524W. It’s smart to round up for flexibility and future upgrades, so anywhere between 550W and 1000W should work well. It’s also worth noting that most PSU manufacturers recommend aiming for around 50% load for optimal efficiency, but going for a larger PSU is generally fine. Just pick one based on what fits your budget and availability!
You can simplify things by using PCPartPicker; just plug in your components and it’ll suggest a wattage. Just make sure to avoid cheap PSUs! I saw that PCPartPicker suggested 500W, but some other sites recommend 600-699W, which can be confusing. If you're worried about exceeding wattage, remember it's safer to opt for a bit more than to risk underpowering.
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