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Best PSUs for RTX 3090 Ti (Gaming, 850W, 1000W, 1200W)

Find out what power supply do you need for rtx 3090 ti graphics card.

The RTX 3090 Ti represents the pinnacle of Nvidia’s Ampere graphics card lineup, demanding some of the highest power requirements of any consumer GPU. With its beefy specifications including 10,752 CUDA cores and 24GB of GDDR6X memory clocked at 21Gbps, the RTX 3090 Ti can draw over 450 watts at full load when overclocked. Powering this power-hungry beast requires careful selection of an appropriately specced PSU.

Nvidia recommends at least 850W. This provides a baseline, though 1000W or more is better for overclocking and future upgrades. Ideally, you’ll want an 850-1000+ watt 80 Plus Gold or better certified fully modular PSU from reputable brands like Corsair, EVGA or Seasonic.

This provides plenty of stable headroom even with an overclocked GPU and CPU. Multiple 12VHPWR connectors are recommended to max out overclocking potential. The PSU should feature high quality internal components like all Japanese capacitors for stability under heavy loads. Cooling is also important – large quiet fans and zero RPM modes are ideal.

The RTX 3090 Ti will take advantage of PCIe 5.0 compatible motherboards, CPUs and drives for maximum bandwidth, so an ATX 3.0 compliant PSU is recommended. 12th/13th gen Intel CPUs or AMD Ryzen 7000 series chips paired with DDR5 memory and an NVMe SSD will allow you to fully exploit the performance potential of such a powerful GPU. High resolution 144Hz+ monitors with HDMI 2.1 or DisplayPort 1.4 can display frames rendered by the 3090 Ti at buttery smooth framerates.

Selecting the right PSU is crucial to realize the full performance of the RTX 3090 Ti without instability. Investing in a high quality PSU with sufficient wattage headroom will provide peace of mind and the best experience.

1. MSI MPG A850G PCIE 5 & ATX 3.0 : Oveall Best PSU for RTX 3090 Ti

MSI MPG A850G Oveall Best PSU for RTX 3090 Ti
  • Pros: High quality components, 850W capacity, modular cables, 10-year warranty
  • Cons: More expensive than some competing models

The MSI MPG A850G is an excellent choice for the overall best power supply for powering the power-hungry RTX 3090 Ti. With 850W of continuous power, it provides ample headroom even for an overclocked card. MSI only uses top-quality Japanese capacitors rated for extreme temperatures, ensuring stability and reliability.

This unit is 80 Plus Gold certified for high efficiency, saving on electricity costs. The fully modular design with flat cables makes installation and cable management very easy. The MPG A850G is ATX 3.0 and PCIe 5.0 ready for next-gen hardware.

The quiet 120mm fan keeps things cool without excessive noise. While not the cheapest 850W PSU, the MSI’s stellar build quality, 10-year warranty, and MPG branding make it a great overall choice for high-end 3090 Ti builds.

2. ASUS ROG STRIX 1000W : Best 1000W PSU for RTX 3090 Ti

ASUS ROG STRIX 1000W Best 1000W PSU for RTX 3090 Ti
  • Pros: Massive 1000W capacity, premium components, 10-year warranty
  • Cons: Expensive, overkill for many systems

With 1000W of power, the ASUS ROG Strix 1000W Gold PSU provides more than enough clean and stable power for an overclocked RTX 3090 Ti even paired with a top-end CPU. It’s 80 Plus Gold certified for excellent efficiency up to 92.6%. The fully modular cables are easy to work with and help tidy up your build.

ASUS uses premium components like 100% Japanese capacitors, MicroFine alloy chokes, and 15A fuses for rock-solid stability even under heavy loads. Cooling is handled effectively by the Axial-tech fan design and 0dB technology.

At 1000W, you have all the headroom you need for maxing out the RTX 3090 Ti. And with a 10-year warranty, ASUS has you covered. If you want a top-tier 1000W PSU, the ROG Strix 1000W Gold is a fantastic choice.

3. Thermaltake Toughpower GF3 : Best PSU for RTX 3090 Ti for Gaming

Thermaltake Toughpower GF3 Best PSU for RTX 3090 Ti for Gaming
  • Pros: Great price for performance, 12VHPWR ready, long 10 year warranty
  • Cons: Not as premium components as pricier models

For powering an RTX 3090 Ti strictly for gaming, the Thermaltake Toughpower GF3 1000W is an outstanding choice. It offers more than enough stable 1000W power for any gaming GPU setup with 80 Plus Gold certified efficiency.

Importantly for Nvidia’s new power-hungry cards, it features true 600W 12VHPWR connectors ready for RTX 40 series. Support for ATX 3.0 and PCIe 5.0 ensures you’re future-proofed. The 140mm fluid dynamic bearing fan keeps things cool and quiet.

While not as premium as more expensive models, it focuses on excellent performance at a reasonable price. The 10 year warranty provides peace of mind for your investment. If you want a high-quality PSU focused squarely on gaming for your RTX 3090 Ti, the Toughpower GF3 1000W delivers excellent performance and reliability at a better price point.

4. Corsair RM1000e : Best Budget PSU for RTX 3090 Ti

Corsair RM1000e Best Budget PSU for RTX 3090 Ti
  • Pros: Excellent value, 1000W capacity, 10 year warranty
  • Cons: Lacks premium features of more expensive models

The Corsair RM1000e offers an excellent value for money choice to power the RTX 3090 Ti on a budget. With 1000 watts of power, it easily drives even the most demanding systems. It’s 80 Plus Gold rated for up to 92% efficiency, helping lower your electricity bill.

The fully modular design with flat cables makes for much easier cable management and installation. Importantly, it’s ready for next-gen hardware with ATX 3.0 and PCIe 5.0 support. Quality 105°C Japanese capacitors ensure steady power delivery.

While it lacks some premium features of pricier PSUs, if you want proven performance for your RTX 3090 Ti without breaking the bank, the Corsair RM1000e hits the sweet spot. The 10 year warranty provides peace of mind for this critical component. Overall an outstanding 1000W budget option.

5. NZXT C1200 : Best 1200W PSU for RTX 3090 Ti

NZXT C1200 Best 1200W PSU for RTX 3090 Ti
  • Pros: Massive 1200W capacity, dual 12VHPWR connectors, 10 year warranty
  • Cons: Very expensive, serious overkill for most people

For driving the power-hungry RTX 3090 Ti in a maxed out system, the NZXT C1200 provides an incredible 1200W of reliable 80 Plus Gold certified power. With two massive 12VHPWR connectors, you can easily run multiple next-gen GPUs. It’s fully modular to minimize cable clutter.

The 140mm fluid dynamic bearing fan delivers silent cooling even under heavy loads. Importantly, the C1200 is ready for next-gen hardware with ATX 3.0 and PCIe 5.0 support. While very expensive, for no-compromise performance, the C1200 delivers best-in-class power for ultra high-end builds.

Combine it with an RTX 3090 Ti, high core count CPU, multiple NVMe drives, and all the extras and you’ll have power to spare. Backed by NZXT’s 10 year warranty, the C1200 is purpose-built for maxed out dream systems.

6. Corsair RM1200x Shift : Best Recommended PSU for RTX 3090 Ti

Corsair RM1200x Shift Best Recommended PSU for RTX 3090 Ti
  • Pros: Massive 1200W power, premium components, 10 year warranty
  • Cons: Very expensive, overkill for most people

For a high-end power supply specifically recommended for the RTX 3090 Ti, the Corsair RM1200x Shift is an outstanding choice. It provides a huge 1200 watts of ultra-reliable power, granting ample headroom even for the most demanding systems.

The shift-type fully modular cables offer excellent cable management potential. It’s certified 80 Plus Gold for up to 92% efficiency, helping lower electricity usage. The high quality 105°C Japanese capacitors ensure steady voltage in any conditions. Importantly, ATX 3.0 and PCIe 5.0 support future-proof this PSU. The zero RPM fan mode ensures totally silent operation under lighter loads.

While very pricey, if you want a top-tier 1200W PSU purpose-built to unlock the full potential of your RTX 3090 Ti, the RM1200x Shift comes highly recommended by many enthusiasts. It’s backed by Corsair’s excellent 10 year warranty for peace of mind.

How to choose the Compatible PSU for RTX 3090 Ti

Here are some key factors to consider when selecting the best power supply for an RTX 3090 Ti graphics card:

  • Power Capacity – An RTX 3090 Ti has very high power demands, especially when overclocked. Aim for a 850W+ unit from a reputable brand to allow plenty of headroom. 1000W or 1200W provides even more power for maxed out systems.
  • Efficiency Rating – Look for 80 Plus Gold or higher certified units for maximum efficiency, reducing electricity waste. This saves money in the long run.
  • Modularity – Fully modular PSUs with detachable cables make installing and cable managing much simpler. Avoid non-modular units if possible.
  • Connectors – Ensure the PSU has the new 12VHPWR connector that the RTX 3090 Ti requires. Two connectors allow for maximum overclocking.
  • Quality Components – Japanese capacitors, all solid capacitors, high quality fans – premium internals increase stability and longevity.
  • Warranty – Long 5-10 year warranties from established brands provide peace of mind. This is a component where quality matters.
  • Cooling – Well-designed cooling and large quiet fans keep noise levels low even under heavy load. Passive or semi-passive modes are ideal.
  • Form Factor – Ensure the PSU fits your case. ATX is the most common. SF form factors work for small builds.
  • Certifications – Look for ATX 3.0 and PCIe 5.0 future-proofing. Corsair, EVGA and Seasonic PSUs often support advanced certifications.
  • Budget – Buying more wattage and premium features comes at a higher cost. Decide how much you’re willing to spend.


When it comes to choosing a PSU for the power-hungry RTX 3090 Ti, it’s clear you’ll want a high-wattage, high-efficiency unit from a reputable brand. Based on the products reviewed, key considerations include having at least 850W of capacity, 80 Plus Gold or better efficiency rating, and a fully modular design. Multiple 12VHPWR connectors, quality internal components, quiet cooling, and support for ATX 3.0 and PCIe 5.0 should also be prioritized.

Out of the options compared, the Corsair RM1000x, ASUS ROG Strix 1000W, and Thermaltake Toughpower GF3 1000W stand out as great choices that meet these criteria. They offer ample stable power, premium features and build quality, and 10-year warranties for peace of mind. The RM1000x in particular gets top marks for its excellent Corsair reputation, shift-style modular interface, and rock-solid performance.

While you can’t go wrong with any of those models, the RM1000x gets my expert recommendation as the best overall PSU for maximizing the RTX 3090 Ti based on its stellar balance of quality, performance, features and reasonable price. Investing in a solid 1000W+ unit like this will provide headroom for overclocking and stability under heavy loads while future-proofing your system. Whichever PSU you choose, don’t cut corners – powering Nvidia’s flagship deserves an equally flagship-level power supply.


What power supply do I need for RTX 3090 TI?

The RTX 3090 TI is Nvidia’s newest flagship graphics card and requires a considerable amount of power. Nvidia recommends using at least a 850W power supply for the RTX 3090 TI. A high-quality 850W+ gold or platinum rated power supply from reputable brands like Corsair, EVGA or Seasonic is ideal.

Is 850W enough for 3090 ti?

850W should be enough for most builds running a single RTX 3090 TI. However, if you plan on heavy overclocking of both the GPU and CPU, have multiple drives/accessories, or have an overall high-end system, a 1000W+ unit may be a better choice to provide plenty of headroom.

Is 750W enough for RTX 3090 Ti?

No, 750W is cutting it too close and probably not enough for the RTX 3090 TI. Nvidia recommends 850W. While a high quality 750W unit might power the system, it will likely be running at full capacity putting strain on the PSU. It’s better to follow the 850W recommendation.

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  • Paul Alcorn

    As a teenager, Paul scraped up enough money to buy a 486-powered PC with a turbo button (yes, a turbo button). Back when floppies were still popular he was already chasing after the fastest spinners for his personal computer, which led him down the long and winding storage road, covering enterprise storage. His current focus is on consumer processors, though he still keeps a close eye on the latest storage news. In his spare time, you’ll find Paul hanging out with his kids or indulging his love of the Kansas City Chiefs and Royals.

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