An 850W power supply is the sweet spot for many modern gaming builds, giving enough headroom for a high-end GPU and CPU with room to spare. A quality unit protects your expensive components and runs quietly, while the latest ATX 3.x standards and PCIe 5 connectors suit current graphics cards. This guide compares the best 850W power supplies available now.
We compared the 850W power supplies builders rate most highly, weighing efficiency, modularity, and reliability. Here are seven picks and the build each one suits.
Prime CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2x6 Connector – Black
Prime MSI MAG A850GL PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2x6 Cable, 10 Year Warranty
Cooler Master MWE Gold 850 V2 Fully Modular Power Supply – 850W 80+ Gold Certified PSU, Dual EPS Connectors, Semi-Fanless Low Noise Design, Flat Black Cables, Reliable ATX Gaming PSU, 5-Year Warranty
Cooler Master V850 SFX Gold 850W Small Form Factor PSU ITX SFF Power Supply, Fully Modular, 80 Plus & Cybenetics Gold Certified, ATX 3.1, PCIe 5.1 Ready, 90° 12VHPWR Cable, 10-Year Warranty, Black
CORSAIR RM850e (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
be quiet! Pure Power 13 M 850W Power Supply, 80 Plus® Gold Certification, ATX 3.1 PSU, Support for PCIe 5.1 GPUs, semi-Passive 120mm be quiet! Fan, LLC Technology, Single Rail, for Overclocked GPUs
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Quick Comparison
| PSU | Rating | Reviews | Best For |
|---|---|---|---|
| CORSAIR RM850x (ATX 3.1) | 4.8/5 | 5,710+ | Modern high-end builds |
| MSI MAG A850GL PCIE5 | 4.5/5 | 5,700+ | Fully modular value |
| MSI MAG A850GL White | 4.5/5 | 5,700+ | White-themed builds |
| CORSAIR RM850e (2025) | 4.7/5 | 766+ | Quiet ATX 3.x value |
| be quiet! Pure Power 13 M | 4.8/5 | 544+ | Quiet operation |
| Cooler Master MWE Gold 850 V2 | 4.4/5 | 2,120+ | Budget fully modular |
| Cooler Master V850 SFX Gold | 4.4/5 | 1,387+ | Small-form-factor builds |
Top Picks Reviewed
CORSAIR RM850x (ATX 3.1)
The highest-rated unit, the RM850x is fully modular and built to ATX 3.1 and PCIe 5.1 standards, ready for modern GPUs while running quiet. It is the modern high-end pick.
Pros:
- ATX 3.1 / PCIe 5.1 ready
- Fully modular, quiet
- Excellent reliability
Cons:
- Premium price
Best for: modern high-end builds.
MSI MAG A850GL PCIE5
A fully modular 80 Plus Gold 850W with a native PCIe 5 connector, the A850GL is a strong value for powerful builds. It is the value fully-modular pick.
Pros:
- 80 Plus Gold, fully modular
- Native PCIe 5 connector
- Great value
Cons:
- Compact size needs cable care
Best for: value powerful builds.
MSI MAG A850GL White
The white version of the A850GL brings the same Gold-rated, PCIe 5 performance to white-themed builds. It is the white-build pick.
Pros:
- White design
- 80 Plus Gold, modular
- PCIe 5 ready
Cons:
- Match the white shade
Best for: white-themed builds.
CORSAIR RM850e (2025)
The RM850e offers fully modular, low-noise power with a 12V-2×6 connector at a strong value. It is the quiet ATX 3.x value pick.
Pros:
- Low-noise operation
- Modern 12V-2×6 connector
- Good value
Cons:
- Slightly lower tier than RM850x
Best for: quiet value builds.
be quiet! Pure Power 13 M
True to the brand, the Pure Power 13 M is 80 Plus Gold and tuned for near-silent operation. It is the quietest pick here.
Pros:
- Very quiet
- 80 Plus Gold
- Top rating
Cons:
- Fewer reviews than CORSAIR
Best for: the quietest build.
Cooler Master MWE Gold 850 V2
A budget fully modular 80 Plus Gold unit, the MWE Gold 850 V2 covers powerful builds affordably. It is the budget modular pick.
Pros:
- Affordable fully modular
- 80 Plus Gold
- Reliable
Cons:
- Older connector standard
Best for: budget powerful builds.
Cooler Master V850 SFX Gold
An SFX small-form-factor 850W Gold unit, the V850 SFX packs full power into a tiny size for ITX builds. It is the small-form-factor pick.
Pros:
- Full 850W in SFX size
- 80 Plus Gold
- For ITX builds
Cons:
- Pricier per watt
Best for: small-form-factor builds.
How to Choose
- Wattage headroom: 850W comfortably powers most high-end single-GPU builds with room to spare.
- Efficiency: 80 Plus Gold runs cooler and wastes less power than lower tiers.
- Modularity: fully modular cabling improves airflow and looks.
- Standards: ATX 3.x and PCIe 5 / 12V-2×6 connectors suit the latest GPUs.
- Form factor: standard ATX for most cases, SFX for small-form-factor builds.
Frequently Asked Questions
Is 850W enough for a gaming PC?
Yes, 850W comfortably powers most high-end single-GPU builds, including current top cards, with headroom for stability and future upgrades.
Do I need ATX 3.x or PCIe 5?
For the latest graphics cards, an ATX 3.x unit with a native 12V-2×6 / PCIe 5 connector handles power spikes better and avoids adapters.
What does 80 Plus Gold mean?
It is an efficiency rating; Gold units waste less power as heat, running cooler and quieter than Bronze or White.
Is a fully modular PSU worth it?
Yes, for a cleaner build. You use only the cables you need, improving airflow and cable management.
Our Verdict
Top Pick: the CORSAIR RM850x, the quiet, modern, top-rated 850W unit. Best Value: the MSI MAG A850GL for fully modular Gold power. Premium Pick: the be quiet! Pure Power 13 M for the quietest build.
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Top picks from this guide
MSI MAG A850GL PCIE5, Fully Modular Compact Gaming 850W Power…$108 \xc2\xb7 97/100CORSAIR RM850e (2025) Fully Modular Low-Noise ATX Power Supply with…$110 \xc2\xb7 80/100CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W…$130 \xc2\xb7 80/100be quiet! Pure Power 13 M 850W Power Supply, 80…$110 \xc2\xb7 80/100
