I am planning to upgrade to RTX 5090 next month when it released. So which PSU is best RTX 5090?
Man I wish I found this thread sooner. Would have saved me so much hassle.
I’ve been running my RTX 5090 with a Ryzen 7 9800X3D on a 1000W PSU (a Corsair RM1000e 2025 model) for a few weeks now—and it’s been rock solid. Unless you’re planning to overclock heavily or add a ton of extra peripherals, a good-quality 1000W unit should be plenty. The key is having a PSU with a native 12V‑2×6 connector to ensure optimal power delivery.
A 1200W PSU is ideal for a new build to handle future upgrades. However, if you already own a 1000W unit, the 20% increase isn't worth the cost of replacement unless you have specific high-power requirements.
1000W or 1200W PSU is recommended.
At least 1000W, and recommend for 1200W to 1500W.
I’m running an RTX 4090 with a 1000W PSU, and it’s been rock solid. If the RTX 5090 is even more power-hungry, I’d say 1200W might be the sweet spot, especially if you’re running a high-end CPU and multiple drives. Look for something with a 10-year warranty—Seasonic and Super Flower are great choices.
1200W PSU is recommended.
The ASUS ROG Thor 1200P or Corsair HX1500i would be suitable choices - both offer ATX 3.0 and PCIe 5.0 support with high efficiency.