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Best PSU for i9 14900K (1000W, Gaming, 4090, Compatible)

Find out the Power Supply you need to run Intel Core i9 14900K processor when building a gaming rig with powerful GPUs like RTX 4090, 4080, 4070ti and 3070 Ti.

For most i9-14900K users, an 80+ Gold certified 850W-1000W PSU offers the ideal blend of capacity, efficiency, and cost-effectiveness.

For most systems with the Intel Core i9-14900K, a quality 1000W power supply unit (PSU) is recommended. This provides enough headroom for the 125W TDP and 253W PL2 power draw of the i9-14900K even when overclocked.

A 1200W PSU is more than enough for the majority of i9-14900K systems. While it will work, it is more PSU capacity than is needed. Even heavily overclocked i9-14900K systems with power-hungry GPUs rarely need more than 1000W PSUs.

For extreme overclocking scenarios or multi-GPU setups, a 1500W PSU may be justified. But for the vast majority of users, including overclockers, a good 80+ Gold certified 1000W PSU is ideal for pairing with the i9-14900K.

The key factors are the CPU’s 125W TDP and 253W PL2 ratings, overclocking headroom, and GPU selection. Online PSU calculators can help determine needs based on the full system configuration. But for most people, 850W is the bare minimum, while 1000W offers the best balance of ideal capacity and cost.

Are you gone for low end CPU like 14600K or mid range 14700K? Find out their compatible PSUs.

Our recommended list of the Best PSU for i9 14900K (1000W, Gaming, 4090, Compatible)

  1. Corsair RM850e : Overall Best PSU for i9-14900K RTX 4090
  2. Cooler Master MWE Gold 850 V2 : Best Budget PSU for 14900K
  3. MSI MPG A1000G : Best 1000W PSU for i9-14900K
  4. Thermaltake Toughpower GF A3 1200W : Best Gaming PSU for i9-14900K
  5. Corsair RM1200x Shift : Best 1200W PSU for i9-14900K
  6. Corsair HX1500i : Best 1500W PSU for i9-14900K

Know More :

1. Corsair RM850e : Overall Best PSU for i9-14900K

Corsair RM850e

Yes folks, the Corsair RM850e is an excellent overall choice as the best PSU for the i9-14900K and RTX 4090 build. With 850W capacity and an 80 Plus Gold efficiency rating, it hits the ideal wattage sweet spot for the majority of i9-14900K systems.

The 850W power is sufficient for most i9-14900K builds, even overclocked systems with high-end GPUs. Provides headroom without being overkill.

Its 80 Plus Gold certified for up to 92% efficiency, reducing power waste and heat. Helps justify the higher cost over cheaper PSUs.

Fully modular cables for excellent cable management and airflow in your PC case. 105°C-rated Japanese capacitors for reliability even under heavy loads.

Quiet 120mm cooling fan ensures low noise operation. Backed by Corsair’s excellent 10 year warranty for peace of mind. Additionally, compatible with latest ATX 3.0 and PCIe 5.0 standards for future upgrade readiness.

For high-end systems built around the power-hungry i9-14900K, the Corsair RM850e checks all the right boxes. It provides efficient, quiet, and reliable power delivery with enough capacity for most users. The 10 year warranty and modular cables add even more value at this still reasonable 850W capacity point. Overall an excellent choice as the best PSU to pair with the i9-14900K.

2. Cooler Master MWE Gold 850 V2 : Best Budget PSU for i9-14900K

Cooler Master MWE Gold 850 V2

Step up your build with the Cooler Master MWE Gold 850 V2 power supply, the perfect affordable option for your new Intel Core i9-14900K system. This 850W PSU delivers reliable, efficient power ideal for the i9-14900K’s high demands, all without breaking the bank.

Touting 80+ Gold certification, the MWE Gold 850 V2 achieves over 90% efficiency to reduce excess heat and power bills. The advanced single +12V rail design and high-quality Japanese capacitors keep your system stable even when you push your CPU to the limits.

With a fluid dynamic bearing fan for super silent cooling, you can focus on gaming or creating without distracting PSU noise. The semi-fanless mode keeps the fan stopped until needed, for peace and quiet when workloads are light.

And with full modularity, you can eliminate cable clutter by only using the cables your build needs. Two 8-pin EPS connectors conveniently support even high-end motherboards designed for overclocking the i9-14900K. This PSU even has 10-year warranty coverage for long-lasting reliability.

When building your new powerhouse i9-14900K rig, choose the Cooler Master MWE Gold 850 V2 for affordable 80+ Gold efficiency, silent cooling, modular flexibility, and robust power for Intel’s best. And enjoy 5 years of warranty protection for added buyer assurance.

3. MSI MPG A1000G : Best 1000W PSU for i9-14900K


Unlock the full potential of your Intel Core i9-14900K with the MSI MPG A1000G PCIE 5 & ATX 3.0 Gaming Power Supply. As a 1000W, 80 Plus Gold certified PSU built for today’s most powerful gaming PCs, the MPG A1000G delivers rock-solid, efficient power to your i9-14900K while keeping noise to a minimum.

Equipped with a quad 12V rail design and premium 105°C Japanese capacitors, the MPG A1000G keeps your system stable even when pushing your CPU to the max during intense gaming and overclocking. The 80 Plus Gold rating ensures over 90% energy efficiency, reducing excess heat and power draw.

And with a 120mm cooling fan featuring MSI’s advanced Zero Frozr technology, the fan stays off until needed, enabling whisper-quiet operation during lighter tasks. When gaming heats up, the fan automatically ramps up to efficiently dissipate heat using advanced aerodynamics.

This PSU is ready for the future with full support for the latest ATX 3.0 and PCIe 5.0 power standards. The fully modular cabling eliminates excess wires for clean builds, and the compact size fits most ATX cases.

Give your i9-14900K the power it demands with the feature-packed MSI MPG A1000G. With rock-solid stability, 80 Plus Gold efficiency, advanced cooling, modular cabling, and future-proof ATX 3.0/PCIe 5.0 support, this PSU provides everything you need to build a high-end gaming rig that handles Intel’s hottest CPU with ease.

4. Thermaltake Toughpower GF A3 1200W : Best Gaming PSU for i9-14900K

Thermaltake Toughpower GF A3 1200W

The Thermaltake Toughpower GF A3 1200W is an excellent, high-end gaming PSU compatible with the Intel i9-14900K CPU and Nvidia RTX 4090 GPU.

With 1200 watts of capacity and an 80 Plus Gold efficiency rating, the Toughpower GF A3 provides more than enough clean, stable power for even the most demanding system configurations using the power-hungry i9-14900K and RTX 4090.

The quad 12V rails and high-quality Japanese capacitors keep voltages tight and ripple low, ideal for overclocking both the CPU and GPU.

Importantly for RTX 4090 support, this PSU features true 600W 12VHPWR connectors to fully unlock the performance of the flagship GPU. Many PSUs advertised as “RTX 4090 compatible” use lower-powered dongles that can limit overclocking potential. The Toughpower GF A3 meets Nvidia’s recommended wattage spec for worry-free use with the top-end card.

It offers fully modular cabling for reduced clutter, an efficient 135mm cooling fan to keep noise down, and support for multi-GPU setups. The 10 year warranty provides peace of mind for long-term reliability.

At a mid-range price point for a PSU of this capacity and performance level, the Thermaltake Toughpower GF A3 1200W delivers excellent value. It has all the connections and power delivery capabilities necessary to fully support an overclocked i9-14900K and RTX 4090 without compromise.

For high-end PC builders seeking a reasonably priced, future-proof PSU that won’t hold back top-tier components, the Toughpower GF A3 checks all the boxes.

5. Corsair RM1200x Shift : Best 1200W PSU for i9-14900K

Corsair RM1200x Shift

Power your ultra-high end build with the revolutionary Corsair RM1200x Shift PSU, engineered specifically for systems with Intel’s extreme Core i9-14900K CPU.

This 1200W digital power supply delivers cutting-edge innovation, next-gen compatibility, and ultra-efficient performance to unlock the full potential of the i9-14900K during heavy overclocking and multi-GPU configurations.

The RM1200x Shift features a unique modular interface on the PSU side for cleaner builds, while 105°C-rated Japanese capacitors and a quad +12V rail design ensure rock-solid stability even under heavy loads. Zero RPM fan mode enables silent operation during low and medium workloads.

And you’ll be ready for the future with full compliance to the new ATX 3.0 and PCIe 5.0 power standards, driven by CPUs like the i9-14900K. Corsair’s legendary construction quality and 10-year warranty provide long-term reliability.

When only the best will do for your extreme Intel build, choose the Corsair RM1200x Shift. With next-level features tailored specifically for unlocking the full performance of the i9-14900K, the RM1200x Shift delivers the quality, efficiency, innovation and cutting-edge power delivery you expect from Corsair.

6. Corsair HX1500i : Best 1500W PSU for i9-14900K

Corsair HX1500i

Power your advanced AI deep learning rig with the Corsair HX1500i, the ultra-efficient smart PSU optimized for the intense demands of the Intel i9-14900K.

With 80 Plus Platinum certification, the HX1500i achieves over 94% efficiency at typical loads, reducing power waste and excess heat when your system is crunching datasets for hours on end. The digitally controlled power circuitry and fully modular cables ensure precise, stable power delivery to your i9-14900K CPU and GPUs during complex training tasks.

Triple 8-pin EPS12V connectors give you the headroom to push your i9-14900K to the limits during extreme overclocking experiments. And the advanced 140mm fluid dynamic bearing fan can operate in zero RPM mode for silent running when workloads are lighter.

An intuitive Corsair Link interface even lets you monitor power usage, efficiency, and fan speed directly from your desktop. You can tweak the fan speed curve for the perfect balance of cooling and acoustics.

With formidable 1500W capacity, hyper-efficient operation, intelligent monitoring and control, and legendary Corsair reputation, the Corsair HX1500i is the PSU of choice for AI professionals. Eliminate power limitations and keep your i9-14900K deep learning system running at peak performance all day and night.

How To Choose the Compatible PSU for i9-14900K

Here are some key factors to consider when choosing the best power supply unit (PSU) for the Intel Core i9-14900K CPU:

  • Wattage – Aim for at least 850W, with 1000W or higher recommended especially for overclocking. The i9-14900K can draw over 250W at stock speeds.
  • Efficiency Rating – Look for 80 Plus Gold or higher rated PSUs for less power waste and heat. Higher efficiency helps justify the cost.
  • 12V Rail Design – Multiple, high-amperage 12V rails provide better voltage regulation and overclocking stability.
  • Modularity – Fully modular PSUs reduce cable clutter for better airflow and ease of installation.
  • Cooling – 120mm or larger fans with a zero RPM “fanless” mode allow quieter operation during lighter loads.
  • Warranty – Longer warranties (7-10 years) indicate higher quality components and construction.
  • PCIe 5.0 Support – For future compatibility as GPUs move to PCIe 5.0 power connectors.
  • ATX 3.0 Compatibility – The new ATX standard includes provisions for higher wattage draw of next-gen components.
  • Brand Reputation – Stick with established brands like Corsair, EVGA, Seasonic for proven quality and reliability.


In conclusion, choosing the best power supply unit to pair with the Intel Core i9-14900K CPU requires careful consideration of several factors.

For most builders, a high-quality PSU with an 80 Plus Gold efficiency rating and wattage between 850W to 1000W offers the ideal blend of performance, reliability, and value. This provides enough headroom for the i9-14900K’s high power draw and overclocking capabilities without excessive cost or wasted capacity.

Higher-end models in the 1200-1500W range may appeal to extreme overclockers or multi-GPU enthusiasts but are overkill for typical i9-14900K systems. On the flip side, cheaper PSUs under 850W run the risk of instability when the CPU is stressed.

When evaluating options, check that the PSU can deliver stable, clean power with tight voltage regulation under load. Modular cables, quiet fans, and comprehensive warranties should provide convenience, noise reduction, and peace of mind.

While the i9-14900K opens up exciting possibilities, it also demands a PSU up to the task. Investing in a robust, efficient power supply will enable your CPU to meet its full performance potential. Selecting wisely from quality models in the ideal 850W-1000W range will provide the backbone for a system that handles Intel’s monster 16-core processor with ease.


Is 850w PSU enough for i9 14900K?

An 850W power supply should be enough to power an Intel Core i9-14900K CPU, but it depends on the rest of your system components. The 14900K has a max power draw of around 300W. So as long as you don’t have multiple high-end GPUs or other very power hungry components, 850W should be sufficient.

Is a 1000W PSU enough for 14900K and 4090?

Yes, a quality 1000W power supply should be able to handle an Intel i9-14900K and an Nvidia RTX 4090 graphics card. The RTX 4090 has a recommended PSU wattage of 850W, so with the additional power draw from the 14900K, 1000W should provide enough headroom.

Is 1000W enough for 14900K and 4080?

Yes, a 1000W power supply is enough for a system with an Intel i9-14900K and an RTX 4080 graphics card. The 4080 requires a 750W PSU, so combined with the 14900K a quality 1000W PSU will be sufficient.

How many watts is 14900ks Max?

The Intel Core i9-14900K has a maximum power draw of around 300 watts when fully stressed and overclocked. Its default TDP is 125W, but Intel lists the “Maximum Turbo Power” as 253W. So realistically, the 14900K can draw over 300W at peak usage with aggressive tuning. But in most real world usage, power draw will be lower and a quality 850W+ PSU should handle it fine.


  • Dave James

    Dave has been gaming since the days of Zaxxon and Lady Bug on the Colecovision, and code books for the Commodore Vic 20 (Death Race 2000!). He built his first gaming PC at the tender age of 16, and finally finished bug-fixing the Cyrix-based system around a year later. When he dropped it out of the window. He first started writing for Official PlayStation Magazine and Xbox World many decades ago, then moved onto PC Format full-time, then PC Gamer, TechRadar, and T3 among others. Now he's back, writing about the nightmarish graphics card market, CPUs with more cores than sense, gaming laptops hotter than the sun, and SSDs more capacious than a Cybertruck.

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