SAMA P850 850W Power Supply – Compact Fully Modular ATX 3.1 PSU – PCIe 5.1 & 12V-2x6 GPU Ready – 80 Plus Platinum Certified – Zero RPM 140mm FDB Fan – High-Grade Capacitors – Black
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AI Verdict
This 850W ATX 3.1, 80 PLUS Platinum PSU with a 12V-2x6 connector is for compact gaming builds needing high efficiency and modern GPU support.
This 850W ATX 3.1 PSU is a strong fit for modern gaming PCs, especially those in compact cases, due to its 150mm length and native 12V-2x6 connector. Its 80 PLUS Platinum efficiency and quiet fan operation below 55°C are significant benefits for users focused on performance and acoustics.
If you plan on running two high-power GPUs that each require a 12V-2x6 connector, look for a PSU with multiple native 12V-2x6 outputs or a higher wattage model from the P series like the P1000 or P1200.
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Pros
- 80 PLUS Platinum efficiency (>92% at 50% load) reduces energy waste.
- Native 12V-2x6 connector delivers up to 600W for modern GPUs without adapters.
- Compact 150mm chassis length allows for installation in smaller PC cases.
- Zero RPM fan mode below 55°C keeps noise under 18 decibels during light loads.
- Fully modular cabling simplifies build processes and improves airflow.
Cons
- Warranty structure is 3 years full replacement, then 7 years repair, not a full 10-year replacement.
- Capacitor claim of "100% Japanese" is contradicted by user reports of Taiwanese primary side caps.
- Only one 12V-2x6 (12+4) Pin connector is listed in specifications for the P850 model.
- The brand is relatively new to the PSU market (around 3 years) compared to established manufacturers.
Dimension Scores
80 PLUS Platinum certification with >92% efficiency at 50% load is top-tier for power conversion.
The Zero RPM fan mode below 55°C and adaptive speed control keeping noise under 18 decibels during light use are excellent for quiet operation.
Features high-grade capacitors and comprehensive industrial-grade protection, though the '100% Japanese capacitors' claim is debated.
Fully modular design allows for flexible cable routing and a cleaner build, which is a significant advantage.
Best For
- Compact gaming PC builds requiring an ATX 3.1 PSU.
- Systems with high-end GPUs needing a native 12V-2x6 power connection.
- Users prioritizing energy efficiency with an 80 PLUS Platinum rating.
- Quiet PC enthusiasts who want a fanless mode during low loads.
Not Recommended For
- Budget-constrained builds where Platinum efficiency isn't a priority.
- Users who need multiple 12V-2x6 connectors for extreme multi-GPU setups (P850 only has one).
- Builders who prefer only established, decades-old PSU brands.
Watch Out For
- The advertised "100% Japanese Capacitors" is disputed by user reports indicating Taiwanese primary side capacitors.
- The 10-year warranty is structured as 3 years full replacement followed by 7 years repair, not a full decade of replacement coverage.
- While listed as ATX 3.1, the P850 model specifically includes only one 12V-2x6 (12+4) Pin connector, which might limit some future high-power GPU configurations.
Full Specifications
| ASIN | B0F9941HQL |
| Brand | SAMA |
| Wattage | 850 watts |
| Fan Count | 1 |
| Form Factor | ATX |
| Item Weight | 6.27 pounds |
| Manufacturer | SAMA |
| Connector Type | PCI Express |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Compatible Devices | Gaming PC |
| Product Dimensions | 5.91 x 5.91 x 3.39 inches |
| Maximum Input Voltage | 240 Volts (AC) |
| Item dimensions L x W x H | 5.91 x 5.91 x 3.39 inches |
What Buyers Say
Reddit discussions indicate that SAMA PSUs, including the P850, are generally considered A-tier on PSU lists, often praised for being quieter and cleaner than some competitors. A key point of contention is the "100% Japanese Capacitors" claim, with some users reporting Taiwanese primary caps, and the 10-year warranty having a 3-year replacement, 7-year repair split.
“Man, this thing is super quiet, my old PSU fan sounded like a jet taking off, but this SAMA P850 just chills out until I'm really pushing my GPU, and the cables were actually easy to route, but I wish they were clearer about the warranty being 3+7 years, not just '10 years'.”
Common Praise
- Quiet operation due to fanless mode below 55°C.
- Native 12V-2x6 connector for modern GPUs.
- Compact 150mm length for smaller cases.
- High energy efficiency with 80 PLUS Platinum rating.
- Fully modular cables for clean builds.
Common Complaints
- Discrepancy in "100% Japanese Capacitors" claim, with some primary caps reportedly Taiwanese.
- The 10-year warranty is split into 3 years full replacement and 7 years repair.
- Brand is newer to the PSU market compared to long-established manufacturers.
- Only one 12V-2x6 connector on the P850 model.
Ownership Tips
- The fan remains off for most light desktop use, only spinning up under gaming loads.
- Cable routing is straightforward due to the fully modular design.
- The compact 150mm length genuinely helps with case clearance, especially in smaller builds.
- The actual warranty terms (3 years replacement, 7 years repair) are important to understand for long-term ownership.
Frequently Asked Questions
Does this PSU come with the new 12V-2x6 cable for RTX 40 series GPUs?
Yes, it includes a native 12V-2x6 (12+4) pin connector capable of delivering up to 600W, making it compatible with current and next-gen graphics cards.
Is this power supply quiet?
It features an ECO fan that operates in fanless mode below 55°C and maintains noise levels under 18 decibels during light use, making it very quiet for most tasks.
What is the actual warranty period?
SAMA offers a 10-year warranty, which includes 3 years of full replacement and 7 years of repair service.
Can this fit in a small form factor case?
Yes, its compact 150mm chassis length is designed to fit well in small-form-factor PC builds.
Are the capacitors truly 100% Japanese?
While advertised as 100% Japanese, some user reports suggest that primary side capacitors may be Taiwanese.
Is this PSU ATX 3.0 or ATX 3.1?
This power supply meets the ATX 3.1 standard for stable power delivery.
Buying Guide
When picking a power supply, you're looking for stable power delivery for your components, especially your graphics card. Efficiency ratings like 80 PLUS Platinum tell you how much power is wasted as heat; higher efficiency means less heat and lower electricity bills. The ATX 3.1 standard and 12V-2x6 connector are crucial for compatibility with the latest high-power GPUs, ensuring your system can handle transient power spikes without issues.
80 PLUS Platinum Certified
This means the PSU converts over 92% of AC power into DC power at 50% load, wasting less than 8% as heat. This saves on your electricity bill and keeps your PC case cooler.
ATX 3.1 & 12V-2x6 GPU Ready
ATX 3.1 is the latest standard, designed to handle the massive, sudden power draws (transients) of modern GPUs. The 12V-2x6 connector is the dedicated cable for these new GPUs, providing up to 600W directly, so you don't need clunky adapters.
Fully Modular
This means every cable detaches from the PSU. You only plug in the cables you need, which makes building your PC much cleaner, improves airflow inside the case, and simplifies future upgrades or troubleshooting.
150mm Chassis Length
This is the physical length of the power supply unit. A shorter length, like 150mm, is important for fitting into smaller PC cases, especially those designed for compact builds where every millimeter counts.
Alternatives
If you need more than one native 12V-2x6 connector or a longer full replacement warranty, look for PSUs with multiple PCIe 5.1 connectors or different warranty structures from other brands.
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