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The CORSAIR RMx Series has been powering top-performing PCs for years. These fully modular low-noise PSUs are Cybenetics Gold-certified for lower power consumption, less noise, and cooler temperatures. Fully modular cables make PC builds easy, as you connect only the cables your system requires. On top of that, the RMx Series’ ultra-flexible embossed cables help take the hassle out of installing and connecting your PSU.
Shop CORSAIR RMx Series ATX 3.1 Power Supply
ASRock SL-1000G 1000W Power Supply
ASRock Recommended PSU Table For GPU & CPU
- Brand: ASRock
- Type: ATX3.1 & PCIe5.1
- Maximum Power: 1000 W
- Modular: Full Modular
- Model #: SL-1000G
- Item #: N82E16817955008
- Return Policy: 30-Day Return Policy
- $159.99
- $102.99 –
- Save: 35%
- More options from $102.99 - $206.17
- Free Shipping
MSI MPG A1000GS PCIE5, Fully Modular Gaming 1000W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty
- Brand: MSI
- Type: ATX12V
- Maximum Power: 1000 W
- Modular: Full Modular
- Model #: MPG A1000GS PCIE5
- Item #: N82E16817701030
- Return Policy: 30-Day Return Policy
- $189.99
- $109.99 –
- Save: 42%
- More options from $105.99 - $384.44
- Free Shipping
CORSAIR RM750e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2x6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
- Brand: CORSAIR
- Series: RMx Series
- Type: ATX 3.1 Compatible
- Maximum Power: 750 W
- Model #: CP-9020295-NA
- Item #: N82E16817139339
- Return Policy: 30-Day Return Policy
- $114.99 –
- More options from $97.66 - $157.32
- Free Shipping
SeaSonic CORE GX-750 ATX3 750 W Power Supplies
+ $20 off w/ promo code SSHNY2D, limited offer
- Fans: 120 mm Hydro Dynamic Bearing (HDB) Fan
- PCI-Express Connector: ATX 3 and 16-Pin PCIe Gen 5 Cable (12V-2x6)
- Max PSU Length: 140 mm
- Model #: CORE GX-750 ATX3
- Item #: N82E16817151277
- Return Policy: 30-Day Return Policy
- $109.99 –
- More options from $96.99 - $149.00
- Free Shipping
CORSAIR RMe Series RM1000e 1000 W Power Supply
$35 promotional gift card w/ purchase, limited offer
- Brand: CORSAIR
- Series: RMx Series
- Type: ATX 3.1 Compatible
- Maximum Power: 1000 W
- Model #: CP-9020297-NA
- Item #: N82E16817139337
- Return Policy: 30-Day Return Policy
- $189.99
- $164.99 –
- Save: 13%
- More options from $160.99 - $205.62
- Free Shipping
Corsair SF Series (2024) SF850, 80 PLUS Platinum, Fully Modular SFX Power Supply, CP-9020256-NA
- Fans: 92mm PWM cooling fan
- Input Voltage: 100 - 240 V
- Input Frequency Range: 47 - 63 Hz
- Input Current: 10A-5A
- Model #: CP-9020256-NA
- Item #: N82E16817139331
- Return Policy: 30-Day Return Policy
- $224.99
- $178.99 –
- Save: 20%
- Free Shipping
MONTECH CENTURY II - 1050W High-End ATX Gaming Power Supply - 80 Plus Gold & Cybenetics Platinum
- Brand: Montech
- Type: ATX
- Maximum Power: 1050 W
- Modular: Full Modular
- Model #: Century II 1050
- Item #: N82E16817959009
- Return Policy: 30-Day Return Policy
- $109.90 –
- Free Shipping
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
- Fans: 1 x 120 mm
- SATA Power Connector: 5
- Input Voltage: 100 - 240 V
- Input Frequency Range: 47 - 63 Hz
- Model #: MAG A750GL PCIE5
- Item #: N82E16817701022
- Return Policy: 30-Day Return Policy
- $104.99 –
- More options from $74.99 - $212.44
- Free Shipping
ASRock CL-750G 750 W Power Supply
ASRock Recommended PSU Table For GPU & CPU
- Color: Black
- Fans: 120mm Golf-Blade Sleeve Fan
- +12V Rails: 2
- PCI-Express Connector: 2 x 6-Pin
- Model #: CL-750G
- Item #: N82E16817955015
- Return Policy: 30-Day Return Policy
- $89.99
- $69.99 –
- Save: 22%
- More options from $69.88 - $143.79
- Free Shipping
be quiet! Pure Power 13 M 1000W Modular Power Supply I 80 Plus® Gold I ATX 3.1 I PCIe 5.1 GPUs, semi-Passive 120mm be quiet! Fan, LLC Technology, Single Rail, for Overclocked GPUs I 10 Year Warranty
- Brand: be quiet
- Type: temperature-controlled quality fan
- Maximum Power: 1000 W
- Fans: 1 x 120 mm
- Model #: BP028US
- Item #: N82E16817222042
- Return Policy: 30-Day Return Policy
- $179.90
- $149.90 –
- Save: 16%
- Free Shipping
MSI MPG A850GS PCIE5, Fully Modular Gaming 850W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty
- Brand: MSI
- Type: ATX12V
- Maximum Power: 850 W
- Modular: Full Modular
- Model #: MPG A850GS PCIE5
- Item #: N82E16817701031
- Return Policy: 30-Day Return Policy
- $149.99
- $119.99 –
- Save: 20%
- $109.99 after $10.00 rebate card
- More options from $95.99 - $316.44
- Free Shipping
ASUS ROG Loki SFX-L 1000W Platinum (Fully Modular Power Supply, 80+ Platinum, 120mm PWM ARGB Fan, Aura Sync, ATX 3.0 Compatible, PCIe 5.0 Ready)
- Main Connector: 24Pin
- PCI-Express Connector: 3 x 6+2-Pin
- SATA Power Connector: 6
- Input Voltage: 100 - 240 V
- Model #: ROG-LOKI-1000P-SFX-L-GAMING
- Item #: N82E16817320035
- Return Policy: 30-Day Return Policy
- $279.99
- $229.99 –
- Save: 17%
- More options from $229.99 - $354.80
- Free Shipping
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| Learn about Power Supplies (PSU) & PC Power Standards | |
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Computer power supplies convert the alternating current (AC) electricity from your wall outlet into direct current (DC), which is the kind of power your PC uses. They power all the other PC components with dedicated connectors that limit the need for additional outlets. ATX power supplies have a 20-pin connector, while the ATX12V versions have a 24-pin power connector to fit compatible motherboards. ATX12V motherboards have dual 12V rails that split amperage for added safety. Smaller power supplies take up little space in small laptop cases. Many power supply unit (PSU) models have an 80 PLUS® certification to ensure optimal energy efficiency. The Right PSU Improves Your Computer's PerformanceWhen putting together server power supplies, consider the needs of the PCs connected to the system. The computer wattage should be equal or greater than the amount of power required by all the components of your PC, and you can use simple online tools to calculate this value. You only need to input the model of your CPU, GPU, motherboard and other computer accessories, and these tools automatically calculate the minimum wattage you need. Using a computer power supply with a slightly higher wattage than needed provides protection for your components. The PSU runs at less than its maximum capacity, which could prevent overheating inside the computer case. Higher wattage computer power supplies let you upgrade your CPU or GPU in the future without worrying about power consumption. A PSU only consumes the amount of electricity your computer components use, so you won't have to worry about electric bills, even if you choose a model with a higher wattage. If you have a limited budget, choose a refurbished power supply that provides the same performance of a brand-new one at a lower price point. |
80 PLUS Power Supplies Provide Optimal Energy EfficiencyMany power supplies have an 80 PLUS certification that classifies their energy efficiency. PSUs with the standard 80 PLUS certification offer 80% efficiency at 20%, 50% and 100% loads. There are also Bronze, Silver, Gold, Platinum and Titanium 80 PLUS power supplies with higher energy efficiency than the standard 80 PLUS options. This helps maximize efficiency even in high-load situations. ATX Power Supplies Connect Storage DrivesATX computer power supplies feature a 20-pin main power connector and SATA connectors for storage drives that require an outside power source. ATX12V PSUs have a 24-pin main connector, and do not require the auxiliary power connector. This PSU standard supports dual 12V rails to power modern computer components safely and effectively. EPS12V power supplies use an 8-pin power connector for plugging directly into the processor. Many servers or high-end desktop computers use these power supplies for efficient energy options. There are also smaller power supplies that fit easily into laptop cases. Modular Power Supplies Offer FlexibilityMany PSUs feature hardwired cables to power all the CPU accessories. Modular computer power supplies offer flexibility, as they let you add or remove cables as needed. Removing unneeded cables allows optimal airflow inside the computer case for protection against overheating. |
Last Updated: January 2026 | Newegg Power Supply Buying Guide
Power Supply (PSU) Frequently Asked Questions:
What’s the difference between modular, semi-modular, and non-modular power supplies?
The difference comes down to cable flexibility. Non-modular PSUs have all cables permanently attached, which works fine for budget builds but can create extra clutter. Semi-modular PSUs keep essential cables fixed while allowing optional cables to be added only if needed. Fully modular PSUs let you connect only the cables your system uses, making cable management cleaner—especially popular among Newegg power supply calculator using tempered-glass cases.
How do 80 Plus Bronze, Gold, and Platinum PSU efficiency ratings differ, and do they really matter?
80 Plus ratings measure how efficiently a PSU converts wall power into usable system power. Bronze units meet basic efficiency standards, while Gold and Platinum waste less energy as heat. On Newegg, many shoppers choose Gold-rated PSUs for gaming pc and workstation builds because they run cooler, quieter, and are often built with higher-quality internal components.
Is a single-rail PSU or a multi-rail PSU design better, and what do “rails” actually mean?
A “rail” refers to how power—especially +12V power—is distributed internally. Single-rail PSUs deliver the full available power on one circuit, which simplifies compatibility with high-end GPUs. Multi-rail designs split power across multiple protected circuits for added safety. On Newegg, both designs are common from trusted brands—the key is choosing a well-reviewed model rather than focusing only on rail count.
What’s the difference between a standard ATX PSU and a smaller SFX PSU (small form factor)?
ATX PSUs are the standard size used in most mid-tower and full-tower cases, offering the widest range of wattages and prices. SFX PSUs are physically smaller and designed for compact or small-form-factor builds. Newegg shoppers building Mini-ITX systems often choose SFX units for compatibility, even though they usually cost more per watt.
What sets a high-end, premium PSU apart from a budget PSU with similar wattage?
Wattage alone doesn’t tell the full story. Premium PSUs typically use higher-quality capacitors, better voltage regulation, quieter fans, and longer warranties. On Newegg, higher-end models are also more likely to maintain stable power delivery under heavy GPU or CPU loads—something budget units may struggle with over time.
What is a “rail” in a PSU (for example, the +12V rail) and why is it important?
The +12V rail powers your most demanding components, including the CPU and GPU. A strong, well-regulated +12V rail ensures consistent performance and system stability. When comparing PSUs on Newegg, experienced builders often look beyond total wattage and check how much power is available on the +12V rail specifically.
What are the built-in safety protections in a PSU (OVP, OCP, SCP, etc.), and what do they do?
Quality PSUs include protections like Over Voltage Protection (OVP), Over Current Protection (OCP), Short Circuit Protection (SCP), and Over Power Protection (OPP). These safeguards help prevent damage to your system if something goes wrong. On Newegg, reputable PSU brands clearly list these protections in their specifications.
What is the difference between a PSU’s continuous power output and its peak power output?
Continuous power is the wattage a PSU can reliably deliver long-term, while peak power refers to short bursts it can handle briefly. Newegg recommends focusing on continuous rated wattage, as it reflects real-world performance under sustained gaming or workload conditions.
What does power supply efficiency mean, and why does higher efficiency matter?
Efficiency describes how much power from the wall is converted into usable system power instead of wasted as heat. Higher-efficiency PSUs generate less heat, often run quieter, and can reduce electricity costs over time. That’s why Gold-rated units are a popular balance of price and performance on Newegg.
If I use a higher-wattage PSU than my system needs, will it draw more electricity or harm my PC?
No. A PSU only supplies the power your system actually demands. Using a higher-wattage PSU won’t harm your PC or force it to draw more power—it simply provides additional headroom, which many Newegg builders prefer for future upgrades.
How can I determine how much wattage my PC’s power supply should have?
Start with your CPU and GPU, then add overhead for storage, cooling, and future expansion. Newegg product pages, filters, and PSU calculators make it easier to estimate total system power so you can choose a stable, right-sized PSU.
Should I get a PSU with more wattage than I currently need (to allow for future upgrades)?
Many Newegg customers choose extra headroom to support future GPU or CPU upgrades. A modest buffer can also help the PSU operate more efficiently and quietly under typical loads.
Is it worth paying extra for an 80 Plus Gold or Platinum PSU instead of a Bronze-rated unit?
For gaming PCs, workstations, or systems that run long hours, higher efficiency is often worth it. On Newegg, Gold-rated PSUs are a common sweet spot, while Platinum models are favored by enthusiasts prioritizing maximum efficiency and premium build quality.
Do I need a modular power supply, or will a non-modular (fixed-cable) PSU be okay for my build?
A non-modular PSU can be totally fine—especially in value builds where you don’t mind extra cables. Modular units are popular on Newegg for cleaner cable routing, better airflow, and showcase-style builds where aesthetics matter.
When building a new PC, should I buy a new power supply or can I reuse my old PSU safely?
Reusing a PSU can be safe if it’s a known good-quality model, relatively recent, and meets today’s connector and wattage needs. Many Newegg builders still prefer a new PSU for peace of mind, modern GPU support, and fresh warranty coverage—especially when upgrading major components.
Can a faulty or poor-quality PSU actually damage other components in my computer?
Yes. Unstable power delivery can lead to crashes, corrupted data, or potential component damage over time. Newegg strongly recommends choosing reputable PSU models with complete protections and strong customer feedback.
Do power supplies degrade or lose effectiveness as they age, and does PSU age matter?
Over time, internal components can wear down, which may reduce stability and efficiency—especially after years of heavy use. PSU age matters most when you’re upgrading to a more power-hungry GPU or CPU; in that case, many Newegg shoppers replace older PSUs to reduce risk.
What happens if my PSU is underpowered for my system (not enough wattage)?
An underpowered PSU can cause boot failures, random shutdowns, or crashes under load (often during gaming). On Newegg, using filters and wattage guidance helps you avoid the “it runs fine until it doesn’t” scenario.
Why do experts warn against using cheap, generic PSUs even if they have the advertised wattage?
Some generic units don’t sustain their advertised wattage reliably, and may lack consistent voltage regulation or full safety protections. Newegg builders typically avoid no-name PSUs and prioritize proven models that show clear specs, protections, and long-term reliability signals (like warranty and reviews).
What should I look for to tell if a PSU is high-quality, beyond just its wattage or 80 Plus rating?
Look for strong +12V output, full protection features, modern connectors for your GPU, reputable brand support, long warranty terms, and consistent user feedback. Newegg reviews and Q&A often reveal whether a PSU stays quiet, stable, and reliable over time.
How do I properly install a power supply into my PC case and secure it?
Mount the PSU in the correct orientation for airflow, align screw holes, and secure it using the included case screws. Then connect only the required cables (24-pin, CPU EPS, GPU PCIe, SATA). Newegg case specs typically indicate whether the PSU mounts at the top or bottom so you can confirm fit before purchase.
Which way should the PSU’s fan face when mounting it (should the fan point up or down)?
If your case has a bottom vent and dust filter, fan-down is usually best because it pulls in cool air from outside the case. If there’s no bottom ventilation (or the PC sits on thick carpet), fan-up can be safer for airflow. Many Newegg case pages show the PSU bay layout so you can plan the best orientation.
Are modular PSU cables interchangeable between different power supply models or brands?
No. Modular PSU cables are not universally interchangeable—mixing cables can cause incorrect pinouts and damage components. Newegg strongly recommends using only the cables that shipped with your exact PSU model (or the manufacturer-approved replacements for that model).
Should I turn off or unplug the PSU when I’m installing or removing PC components?
Yes. Turn off the PSU switch and unplug it from the wall before working inside your PC. This reduces the risk of shorts or accidental power delivery while you’re installing or removing parts.
How can I test if my power supply is working properly if my PC won’t turn on?
Start with basics: confirm the PSU switch is on, the wall outlet works, and the 24-pin and CPU power cables are fully seated. If you still get no power, a PSU tester or swapping in a known-working PSU can help isolate the issue. If a new PSU is suspected defective, Newegg order support and return options can help you resolve it quickly.
Bestselling Power Supply Reviews:
Mick C.
8/19/2024 9:05:47 AM
A Much Needed Upgrade for my GPU.
“ I bought this together with a new GPU that had higher requirements than my previous PSU could handle. ”
CORSAIR RMx Series (2021) RM850x CP-9020200-NA 850 W ATX12V / EPS12V 80 PLUS GOLD Certified Full Modular Power SupplyAnonymous
8/12/2024 7:39:52 PM
Great choice for power supply unit
“ This power supply unit is a great choice for any low to medium power draw. ”
EVGA 750 GQ 210-GQ-0750-V1 80+ GOLD 750W Semi Modular EVGA ECO Mode Power SupplySpacedoge
7/31/2024 7:08:52 AM
Amazing power supply
“ Glad i got this power supply, happier i got it for a cheaper price ”
Seasonic FOCUS GX-750, 750W 80+ Gold, Full- Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 10 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-750FXThomas S.
7/18/2024 7:44:22 AM
Great Power Supply with the Latest Standards
“ Have long bought Seasonic power supplies due to their build quality and long warranty. ”
Seasonic VERTEX GX-1000, 1000W 80+ Gold, ATX 3.0 & PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU CompatibleAnthony B.
7/7/2024 1:06:39 AM
Super quiet
“ Great Power Supplly. Will buy again soon to upgrade another computer. ”
Seasonic VERTEX GX-850, 850W 80+ Gold, ATX 3.0 & PCIe 5.0 Ready, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 12 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU CompatibleGavin W.
7/5/2024 11:56:39 AM
Corsair FTW!
“ Putting this new Corsair PSU in fixed my computers power issues and its nearly silent when running ”
CORSAIR RMx Series (2021) RM750x CP-9020199-NA 750 W ATX12V / EPS12V 80 PLUS GOLD Certified Full Modular Power SupplyToke
6/29/2024 10:39:15 PM
Great product
“ Greatttt product for the price. Plenty of power for your build. ”
CORSAIR RM750e Fully Modular Low-Noise ATX Power Supply - ATX 3.0 & PCIe 5.0 Compliant - 105°C-Rated Capacitors - 80 PLUS Gold Efficiency - Modern Standby SupportAnonymous
6/4/2024 7:35:53 AM
Great psu
“ Buy it if you need a good, reliable power supply. ”
Seasonic FOCUS GX-1000, 1000W 80+ Gold, Full-Modular, ATX Form Factor, Low Noise, Premium Japanese Capacitor, 10 Year Warranty, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-1000FX