I'm building a PC with some high-end components, and I'm trying to figure out how much wattage I need for my power supply unit (PSU). Here are my specs: Intel I9-14900K (3.2GHz), Asus ROG Strix 3090 (24GB OC), Corsair Vengeance (4x16 GB, 6400MHz DDR5), and Asus ROG Strix Z690-E WIFI. I'm also using a Lian Li O11 Dynamic EVO XL case along with a Samsung 2x 1TB SSD 870 Evo, and I'll be getting an M.2 SSD soon. My CPU and GPU will be overclocked and water-cooled with an EK Loop setup, which includes 2x 420mm radiators and 6 fans, plus a reservoir and pump combo. Although PC Part Picker estimates around 800W, Asus recommends an 850W PSU. Is that recommendation for the whole build or just the GPU? I'm considering whether I should go for a 1000W or 1300W PSU from Lian Li, which I really like for their cable management. What do you all suggest?
5 Answers
Aim for about 200W more than your estimated usage; so a 1000W PSU would be a good choice. The PC Part Picker estimate includes everything, so that 850W recommendation from Asus is likely for the entire build. Just make sure to check for any potential power spikes when the CPU or GPU are under load to be safe.
I'd recommend getting at least a 1000W or even a 1200W PSU from a reputable brand like Seasonic. I bought an expensive PSU ages ago, and it's been fantastic through multiple builds without needing a replacement. Investing in a quality PSU means you won’t have to worry about it later.
I'd suggest starting with a 1000W PSU. It's a solid baseline for a build like yours.
In my experience, many issues I’ve had with builds stemmed from the PSU. My PC Part Picker recommended 600W, but I went for a Super Flower VII Pro Platinum 1000W, and I've never regretted it. It's better to have more power than you need than to find yourself short later on.
I was considering a 1300W as well, but I think 1000W might be sufficient. Just can't shake the feeling that 1300W could be overkill.
You've got some components that tend to spike in power consumption, so I'd definitely lean towards a 1K watt PSU. Better safe than sorry with these high-end parts.
If you can swing it, going for 1300W is a better bet for future-proofing.