A 1000W power supply is the sweet spot for a serious modern gaming PC — enough headroom to feed a top-tier graphics card and a power-hungry CPU with margin to spare for transient spikes, while leaving room to upgrade later. At this wattage you also want quality: fully modular cabling for clean builds, 80+ Gold (or better) efficiency to run cool and quiet, and ideally ATX 3.x with a native 12V-2×6 connector for the latest GPUs. This guide rounds up the best 1000W PSUs in 2026, anchored on units that genuinely deliver around a kilowatt.
We have led with true 1000W-class units and been completely honest about the two off-spec items the category list included: one is an 850W supply and one is a 500W budget unit, and we flag exactly what each is rather than pretending they hit 1000W. Prices range from around $38 up to around $179. For a build that actually needs a kilowatt, focus on the genuine 1000W picks; the lower-wattage entries are noted for what they really are and who they suit. Below is an at-a-glance comparison of all six, then a closer look at each and a buyer’s guide built around wattage, efficiency, modularity and ATX 3.x.
Best 1000W PSUs at a Glance
| Power Supply | Best For | Standout Spec | Approx Price |
|---|---|---|---|
| CORSAIR RM1000x ATX 3.1 (2024) | Latest-GPU 1000W build | 1000W, ATX 3.1, 12V-2×6, low noise | around $160 |
| Corsair RMX RM1000x (2018) | Proven 1000W workhorse | 1000W, 80+ Gold, fully modular | around $179 |
| MSI MPG 1000W 80+ Gold | Japanese-capacitor 1000W | 1000W, 100% Japanese caps | around $161 |
| MSI MAG A1000GL PCIE5 | Compact 1000W value | 1000W, PCIe 5, compact body | around $135 |
| MSI MPG A850G PCIE5 (850W) | High-end 850W builds | 850W (not 1000W), PCIe 5 | around $110 |
| ARESGAME AGV 500W Bronze | Budget low-power builds | 500W (not 1000W), 80+ Bronze | around $38 |
1. CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W
CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully Modular 1000W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector – Black
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The CORSAIR RM1000x ATX 3.1 is the pick for a modern, latest-GPU 1000W build. It delivers a full 1000W with ATX 3.1 and PCIe 5.1 readiness, meaning a native 12V-2×6 connector to power current high-end graphics cards directly, plus fully modular cabling and a low-noise fan profile. At around $160 it is the most up-to-date unit here and our lead recommendation for a new build.
This is the supply to choose if you are pairing a current-generation GPU with a strong CPU and want everything future-proofed. The genuine 1000W rating gives ample headroom for transient power spikes, the ATX 3.1 standard handles those spikes gracefully, and the native 12V-2×6 cable removes the need for messy adapters. Fully modular cabling keeps the build tidy and airflow clean, and the quiet fan profile keeps it unobtrusive. For a kilowatt of clean, modern, well-supported power, the RM1000x ATX 3.1 leads the pack.
Pros: Full 1000W, ATX 3.1 with native 12V-2×6, fully modular, low-noise operation.
Cons: Premium for a 1000W unit; more capacity than mid-range builds need.
2. Corsair RMX Series RM1000x, 1000 Watt, 80+ Gold, Fully Modular
Prime Corsair RMX Series (2021), RM850x, 850 Watt, Gold, Fully Modular Power Supply (Renewed)
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The Corsair RMX RM1000x (2018) is the proven workhorse 1000W pick. It is a long-standing, widely trusted unit delivering a full 1000W at 80+ Gold efficiency with fully modular cabling and Corsair’s reputation for reliable, quiet operation. At around $179 it commands a slight premium on the strength of its track record.
This is the supply for the builder who values a battle-tested design with years of positive history over the very latest connector standard. The genuine 1000W rating comfortably powers a high-end GPU and CPU, the 80+ Gold efficiency keeps it running cool and quiet, and fully modular cabling makes for a clean install. Note it predates ATX 3.x, so a current GPU may need the bundled adapter rather than a native 12V-2×6 cable. If reliability and a proven reputation top your list, this RM1000x remains a dependable kilowatt supply.
Pros: Genuine 1000W, 80+ Gold efficiency, fully modular, long proven reliability record.
Cons: 2018 design predates ATX 3.x; may need an adapter for the newest GPUs.
3. MSI MPG 1000W 80+ Gold Power Supply, 100% Japanese Capacitors
msi MPG 1000W 80+ Gold Power Supply - 1000W 80+ Gold - 100% Japanese Capacitors - Compatible with PCIe 5.0 Graphics Cards - 1 Fan(s)
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The MSI MPG 1000W is the quality-components 1000W pick. It pairs a full 1000W output and 80+ Gold efficiency with 100% Japanese capacitors — a sign of build quality prized for longevity and stable voltage delivery under load. At around $161 it is a strong mid-premium option for a high-end build that values component pedigree.
This is the supply for the enthusiast who looks past the wattage number to what is inside. The genuine 1000W rating provides solid headroom for a powerful GPU and CPU, the all-Japanese capacitors support reliable operation and a long service life, and the 80+ Gold efficiency keeps heat and noise in check. As an MSI MPG-series unit it slots neatly into a quality build. For a dependable kilowatt PSU with premium internal components, the MPG 1000W is a smart choice.
Pros: Full 1000W, 80+ Gold, 100% Japanese capacitors for longevity and stable delivery.
Cons: Check the model’s connector generation if you need native 12V-2×6.
4. MSI MAG A1000GL PCIE5 Fully Modular Compact Gaming 1000W
MSI MAG A750GL PCIE5, Fully Modular Compact Gaming 750W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2x6 Cable, 10 Year Warranty
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The MSI MAG A1000GL is the compact-value 1000W pick. It delivers a full 1000W with PCIe 5 support and a fully modular, notably compact body that eases installation in tighter cases, and at around $135 it is the most affordable genuine 1000W unit on this list. It is the value entry point to a kilowatt of power.
This is the supply for the budget-conscious builder who still wants real 1000W headroom and modern GPU support. The genuine 1000W rating powers a high-end graphics card and CPU with margin, the PCIe 5 readiness suits current cards, and the compact, fully modular design makes for a clean, easy build even in smaller chassis. As MSI’s MAG-series value line it keeps the price keen without dropping the wattage. For the best price-per-watt at a true kilowatt, the A1000GL is the standout.
Pros: Full 1000W, PCIe 5 support, compact fully modular body, best value at this wattage.
Cons: MAG value line; fewer premium extras than higher-tier units.
5. MSI MPG A850G PCIE5 Fully Modular Compact Gaming 850W
MSI MPG A850G PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold, Native 12V-2x6 Cable, 100% Japanese Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, 10 Year Warranty
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A clear, honest note on this one: the MSI MPG A850G is an 850W power supply, not a 1000W unit, despite appearing in the 1000W shortlist. It is a quality supply in its own right — fully modular, 80+ Gold, PCIe 5 ready and compact — but its rating is 850W. At around $110 it is a strong choice for a build that needs around 850W, just not for one that specifically requires a kilowatt.
We include it for transparency and because it suits a slightly lower-power high-end build very well. With 850W and PCIe 5 support it comfortably runs a powerful single-GPU gaming PC that does not demand full 1000W headroom, the fully modular cabling keeps things tidy, and the 80+ Gold efficiency runs cool and quiet. If your parts genuinely need 1000W, choose one of the true kilowatt units above; if 850W is enough, this is an excellent MPG-series option.
Pros: Quality 850W unit, fully modular, 80+ Gold, PCIe 5 ready, compact and tidy.
Cons: Rated 850W, not 1000W — under-spec if you specifically need a kilowatt.
6. ARESGAME AGV Series 500W 80 Plus Bronze Non-Modular Power Supply
ARESGAME AGV Series 500W Power Supply, 80 Plus Bronze Certified, Non Modular Power Supply, 5 Year Warranty
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For full honesty, the ARESGAME AGV 500W is a 500W, 80+ Bronze, non-modular budget power supply — half the wattage of this category and clearly not a 1000W unit. It is included for transparency because it appeared on the shortlist, but at around $38 it belongs to a completely different class of build than a kilowatt PSU.
This supply suits an entry-level or office PC with low power draw — integrated graphics or a modest, low-wattage GPU — where 500W is sufficient and budget is tight. The 80+ Bronze efficiency is reasonable for the price and the fixed cabling keeps cost down, but it has no place in a high-end gaming build that needs 1000W of headroom. If you arrived here for a kilowatt PSU, look to the genuine 1000W picks above; the AGV 500W is only relevant for a small, low-power system.
Pros: Inexpensive, adequate 80+ Bronze efficiency, fine for low-power office or entry builds.
Cons: Only 500W and non-modular — entirely unsuitable for a 1000W high-end build.
How to Choose a 1000W Power Supply
The first thing to verify on any ‘1000W’ shortlist is the actual rating, because labels can mislead. On this list four units are genuine 1000W supplies (the two RM1000x models, the MSI MPG 1000W and the MAG A1000GL), one is an 850W unit (the A850G), and one is a 500W budget supply (the ARESGAME AGV). Always read the wattage on the unit itself, total your components’ power draw, and add headroom on top before deciding — never assume a number from a category title.
Once you have confirmed wattage, efficiency is the next priority. An 80+ Gold rating, which every genuine 1000W unit here carries, means the supply wastes less energy as heat, runs cooler and quieter, and costs less to run than a Bronze unit like the AGV. For a high-end PC drawing serious power, Gold is the sensible minimum; it pays for itself in lower heat and quieter operation over the life of the build, and it signals a generally higher build standard.
Modularity and connectors shape how clean and future-proof your build is. Fully modular cabling — on the RM1000x units, the MSI MPG and the A1000GL — lets you connect only the cables you need for tidy routing and better airflow, while a non-modular unit like the AGV hard-wires everything. For the newest graphics cards, look for ATX 3.x with a native 12V-2×6 connector, as on the RM1000x ATX 3.1, to avoid adapters and to handle transient power spikes gracefully.
Finally, match the wattage to your real build and buy a little headroom, not a lot of waste. A genuine 1000W unit like the RM1000x ATX 3.1 or the value A1000GL is ideal for a top-tier GPU and CPU with room to upgrade. If your parts only need around 850W, the A850G is a fine, cheaper fit; if you are building a low-power office PC, a 500W unit like the AGV is enough. Confirm the true wattage, prioritise 80+ Gold and modular cabling, check the connector generation, and pick the supply here that actually matches your power needs.
Frequently Asked Questions
How much power supply wattage do I need for a high-end gaming PC?
Total your components’ draw — chiefly the GPU and CPU — and add headroom for transient spikes and future upgrades. A 1000W unit like the CORSAIR RM1000x ATX 3.1 or MSI MAG A1000GL is a comfortable choice for a top-tier GPU paired with a strong CPU. Many high-end builds run happily on 850W, such as the MSI A850G here, so confirm your actual draw rather than overbuying.
Are all the power supplies on this list really 1000W?
No, and we flag it clearly. Four are genuine 1000W units: the two CORSAIR RM1000x models, the MSI MPG 1000W and the MSI MAG A1000GL. The MSI A850G is an 850W unit, and the ARESGAME AGV is a 500W budget supply. If you specifically need a kilowatt, choose from the four true 1000W picks; the others suit lower-power builds.
Do I need an ATX 3.x power supply for a new GPU?
It is strongly preferable for the latest graphics cards. ATX 3.x units with a native 12V-2×6 connector, like the CORSAIR RM1000x ATX 3.1, power current GPUs directly without adapters and handle transient power spikes more gracefully. Older 80+ Gold units such as the 2018 RM1000x still work well but may require the bundled adapter for the newest cards.
Is 80+ Gold worth it over 80+ Bronze for a 1000W build?
For a high-end PC, yes. An 80+ Gold supply wastes less power as heat than Bronze, so it runs cooler and quieter and costs slightly less to run over time. Every genuine 1000W unit on this list is 80+ Gold. The Bronze ARESGAME AGV here is a 500W budget unit for low-power systems, not a high-end kilowatt build.
Related Guides
- Best Power Supplies
- Best 850W Power Supplies
- Best Fully Modular PSUs
- Best GPUs for Your Build
- Best PC Cases
- Best Pre-Built Gaming PCs
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