Best Power Supplies for Intel Core i9-11900K

Intel Core i9-11900K processors are the most powerful consumer CPU, but you need a power supply to deliver clean voltage and amps. The best power supplies for Intel Core i9-11900K processors will be able to handle overclocking while delivering consistent performance. You’ll also want to make sure that your power supply is compatible with the motherboard you purchase so it can feed all of your other components!

Best Power Supplies for Intel Core i9-11900K

1. Corsair RM1000x

CORSAIR RMX RM1000X

  • 80 PLUS GOLD Certified
  • Fully Modular Power Supply
  • 100% Japanese 105°C capacitors Premium internal components ensure solid power delivery and long-term reliability.
  • Seven Year Warranty
  • Zero RPM Fan Mode Since the fan doesn’t turn on until it’s needed

Pros: 100% Modular, 10 Year Warranty, 80 Plus Gold Certified

Cons: Peak Efficiency (92%)

The Corsair RM1000x is the best power supply for the Intel Core i9-7960X processor. It’s an excellent power supply with great voltage regulation and high efficiency. It’s also fully modular so you can custom-build the power cables to your exact specifications. The Corsair RM1000x also comes with a 10-year warranty and an 80 plus gold certification.

2. EVGA SuperNOVA G3

EVGA SuperNOVA 650

  • 80 Plus Gold 650W
  • Fully Modular
  • Eco Mode with
  • New HDB Fan
  • 7 Year Warranty
  • Includes Power ON Self Tester
  • Compact 150mm Size, Power Supply 220-G3-0650-Y1

Pros: 12 Year Warranty, Excellent Voltage Regulation, Quiet Operation

Cons: Only Semi-Modular

The second-best power supply for the Intel Core i9-7960X is the EVGA SuperNOVA G3. It matches the RM1000x with 100% Modular cable design, semi-fanless operation, excellent voltage regulation, and quiet operation. The SuperNova G3 also comes with a 12-year warranty which is simply outstanding for a power supply in this price range.

3. Corsair HXi Series

Corsair HXi Series

  • Corsair HXi HX1200i
  • ATX12V & EPS12V Power Supply
  • 92% Efficiency 1.20 kW
  • RoHS, REACH

Pros: Excellent Voltage Regulation, 10 Year Warranty, Quiet Operation

Cons: None

Corsair HXi series is a very good power supply for the Intel Core i9-7960X. It’s fully modular and comes with a 10-year warranty. It also has excellent voltage regulation and it operates quietly as you would expect from a premium PSU manufacturer like Corsair.

4. Seasonic PRIME Ultra Platinum


Seasonic Prime Ultra 650 Platinum

  • 650 Platinum
  • SSR-650PD2 650W 80+ Platinum
  • Full Modular
  • 135mm Fdb Fan W/Hybrid Fan Control, Compact
  • 140mm Size
  • Power On Self Tester
  • 12 Yr Warranty Power Supply

Pros: 10 Year Warranty, Great Voltage Regulation, High-Efficiency

Cons: Expensive

Seasonic PRIME Ultra Platinum is the best power supply for the money if you are building a new Intel Core i9-7900X system. It’s one of the most efficient power supplies with excellent voltage regulation and it operates very quietly. It’s also fully modular and comes with a 10-year warranty which should put your mind at ease.

5. EVGA SuperNOVA P2 1200W


EVGA Supernova 1200 P2 80+ Platinum

  • 200W ECO Mode Fully Modular
  • NVIDIA SLI
  • Crossfire Ready 10 Year Warranty
  • Power Supply 220-P2-1200-X1
  • 140mm Double Ball Bearing

Pros: High Efficiency, Modular Design, Great Build Quality

Cons: Expensive

The EVGA SuperNOVA P2 power supplies are built like tanks. They deliver excellent voltage regulation, very little noise and they are extremely efficient. You can also fully configure them to your liking with the fully modular design. The only downside is their high price tag but it’s worth every penny.