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Seasonic PRIME PX-1600, 1600W 80+ Platinum, ATX 3.1 & PCIe 5.1 Ready, Full Modular, Low Noise, Premium Japanese Capacitor, Nvidia RTX 30/40 Super, AMD GPU Compatible, Ref# SSR-1600PD2
- ATX 3.1 and PCIe 5.1 Compatible
- Ultra-high Efficicency, 80 PLUS® Titanium Certified
- Cybenetics ETA Titanium and Lambda A Certified
- Fully Modular
- Native 12V-2x6 cable
- Top-Quality 135 mm Fluid Dynamic Bearing Fan
- Digital Hybrid Fan Control
- Micro Tolerance Load Regulation (MTLR) [0.5 %]
- Super Low Ripple Noise [under 20 mV]
- Cable-free Connection Design
- Gold Plated High Current Terminal (MB, CPU and PCIe)
- Multi-GPU Technology Support
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Overview
Specs
Reviews (5)
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Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 12 years
- Limited Warranty period (labor): 4360 days
- Read full details
Return Policies
- Return for refund until: January 31, 2026
- Return for replacement until: January 31, 2026
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-626-969-9966
- Support Website
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The Seasonic PRIME PX-1600 is a 1600W fully modular ATX/EPS workstation power supply designed for high-end PCs, demanding workstations, and multi-GPU systems. It supports ATX 3.1, PCIe 5.1, and includes a native 12V-2x6 cable for modern graphics cards.
Recommended For
- Users building dual-flagship-GPU workstations for GPU rendering, machine-learning development, simulation, or other sustained compute workloads that can benefit from 1600W capacity and multiple high-power GPU connectors.
- Extreme PC builders running a high-end GPU and heavily overclocked processor, especially systems configured for unusually high GPU power limits or demanding transient loads.
- Long-term upgrade-focused builders who want native ATX 3.1 and PCIe 5.1 support, a native 12V-2x6 cable, and enough headroom for future high-power graphics cards and processors.
- Users assembling large workstation or enthusiast PCs with many storage devices, expansion cards, and power cables who value fully modular cabling and extensive connector availability.
Real-World Use Scenarios
- A user building a dual-GPU workstation for AI workloads, 3D rendering, or GPU compute can use the PRIME PX-1600 to power two high-end graphics cards and a high-core-count CPU from one PSU; testing indicates that its capacity and multi-GPU connectivity are suited to this type of sustained, high-load system.
- A user running a flagship gaming PC with a high-end NVIDIA or AMD GPU can connect the graphics card using the PSU’s native high-power GPU cable instead of relying on multiple external adapter leads, simplifying installation and reducing cable clutter around the GPU.
- During long GPU rendering, video-export, or scientific-computing sessions, the PSU is likely to provide consistent power without large voltage variation; independent testing found strong load regulation, low ripple, and efficiency above 90% across typical high-load measurements.
- For normal desktop work, browsing, and moderate gaming loads, the fan can remain stopped or operate at very low speed, so the PSU should contribute little additional noise; under near-full output, however, the fan becomes more noticeable and the system’s other components may already be loud.
- A builder installing this PSU in a large full-tower workstation case can benefit from the fully modular cabling, but should verify clearance first because the approximately 210 mm chassis length can interfere with drive cages, cable space, or cases limited to shorter power supplies.
- A user planning several future GPU or CPU upgrades can keep the same PSU through multiple high-end system revisions, but the 1600 W capacity is mainly practical for multi-GPU or unusually power-dense workstations and is unnecessary for most conventional single-GPU gaming builds.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Workstation and high-power computer builds requiring 1600 W output, full modular cabling, and ATX/EPS compatibility |
| Power And Efficiency | 1600 W power supply with 80 PLUS Titanium and Cybenetics Titanium efficiency certifications |
| Cooling And Noise | Air-cooled by one 135 mm fluid dynamic bearing fan with Digital Hybrid Fan Control and a Cybenetics A noise rating |
| Modularity And Connectors | Fully modular ATX/EPS design with individual black braided cables and one 20+4-pin ATX connector |
| Electrical Input | Accepts 100–240 V input at 50–60 Hz, drawing 15 A at 100 V or 10 A at 240 V |
| Protection And Warranty | Includes OPP, OVP, UVP, OCP, OTP, and SCP protection with a 12-year warranty |
| Dimensions And Weight | Measures 8.3 × 6 × 3.4 inches, with a maximum PSU length of 210 mm and a weight of 6.17 lb |
| Model Identifiers | Seasonic Prime PX-1600 ATX 3.1, model SSR-1600PD2 |
Reference Q&A
Q: Is the Seasonic PRIME PX-1600 better than the PRIME TX-1600?
A: Choose the PRIME PX-1600 when ATX 3.1 compatibility, native 12V-2x6 connectivity, and 1600W capacity are the priorities at a lower efficiency tier. Choose the PRIME TX-1600 when higher efficiency and lower noise under sustained heavy loads matter more. Both models are fully modular, 210 mm long, rated for 1600W, and carry 12-year warranties; the PX-1600 is 80 PLUS Platinum, while the TX-1600 is 80 PLUS Titanium.
Q: Should I buy the Seasonic PRIME PX-1600 or Corsair AX1600i?
A: Choose the PRIME PX-1600 for a new high-power GPU workstation because it supports ATX 3.1, PCIe 5.1, and a native 12V-2x6 cable. Choose the Corsair AX1600i if higher 80 PLUS Titanium efficiency, digital monitoring through iCUE, and a slightly shorter 200 mm chassis are more important. The AX1600i uses the older ATX12V 2.4 platform, so it may require more attention to GPU cable compatibility in a newer build.
Q: Is the Seasonic PRIME PX-1600 a better choice than the be quiet! Dark Power Pro 13 1600W?
A: Choose the PRIME PX-1600 when native 12V-2x6 cabling and the newer ATX 3.1/PCIe 5.1 specification are the deciding factors. Choose the Dark Power Pro 13 1600W when 80 PLUS Titanium efficiency, premium sleeved cabling, and its tested low-noise behavior are more valuable. Both are large, fully modular 1600W-class power supplies intended for high-end workstations rather than compact PCs.
Q: Do I need the PRIME PX-1600, or is a 1300W PSU enough?
A: A 1300W PSU is the more practical choice for most single-GPU gaming PCs and many high-end workstations. Choose the PRIME PX-1600 when the system includes multiple high-power GPUs, power-hungry CPUs, extensive storage or expansion hardware, or a workload with sustained peaks that benefits from additional headroom. The PX-1600 is designed for large workstation builds and provides two high-power 16-pin GPU connections.
Q: Is the PRIME PX-1600 suitable for a compact or portable PC build?
A: The PRIME PX-1600 is better suited to a performance-first workstation than a compact or portable PC because its chassis is 210 mm long and its 1600W capacity is intended for multiple high-power components. For a smaller build, choose a shorter 1000W-to-1300W PSU when the system’s calculated power demand allows it. Verify the case PSU-clearance specification before buying.
Q: Is this power supply suitable for current high-end graphics cards and multi-GPU systems?
A: Yes. The Seasonic PRIME PX-1600 provides 1600W, supports ATX 3.1 and PCIe 5.1, includes a native 12V-2x6 cable, and supports multi-GPU configurations. Confirm the graphics card manufacturer’s recommended wattage and connector requirements before installation.
Q: Who should buy a 1600W power supply like this?
A: It is best suited to high-power workstations, multi-GPU systems, heavily overclocked PCs, and builds that need substantial future upgrade headroom. For a typical single-GPU gaming or office PC, 1600W may provide more capacity than necessary; select wattage based on the system’s calculated peak demand and the GPU manufacturer’s recommendation.
Q: Will this power supply fit in my PC case?
A: The unit is approximately 210 mm long and uses the ATX/EPS form factor. Check the case manufacturer’s maximum PSU length and allow additional space for modular cable connections and cable routing. Physical clearance should be confirmed before purchase, especially in compact or storage-heavy cases.
Q: Is the Seasonic PRIME PX-1600 quiet during normal use?
A: It is designed for low-noise operation with a 135 mm fluid dynamic bearing fan, digital hybrid fan control, and a Cybenetics Lambda A noise rating in the supplied specifications. It should not be treated as completely silent: fan speed and audible noise vary with system load, temperature, airflow, and installation.
Q: Is this power supply fully modular, and does it include the cables needed for a new build?
A: Yes. It is fully modular, so only the required cables need to be connected, which can simplify cable management. The product is listed with a native 12V-2x6 cable and modular connections, but buyers should verify the included cable count, connector types, and cable lengths against their motherboard, graphics cards, storage devices, and case layout.
Q: Is the Seasonic PRIME PX-1600 overkill for a typical high-end gaming PC?
A: Usually, yes. The 1600W capacity is mainly justified for multi-GPU workstations, heavily overclocked systems, or high-end builds that sustain unusually high power draw. Many single-GPU systems can use a lower-wattage ATX 3.x PSU.
Q: Who is the Seasonic PRIME PX-1600 suitable for?
A: It is best suited to multi-GPU workstations, demanding compute or AI systems, and enthusiast PCs requiring substantial power headroom. Its 1600W output, multi-GPU support, native 12V-2x6 cable, and fully modular design are less necessary for ordinary single-GPU builds.
Q: Is the PRIME PX-1600 worth buying instead of a 1300W or 1000W PSU?
A: It is worth considering when the system has a genuinely high sustained load, planned multi-GPU expansion, or a large price difference between comparable models. Otherwise, a quality 1000W–1300W ATX 3.x PSU may provide sufficient capacity at lower cost and with less unused headroom.
Q: Will the PRIME PX-1600 fit in my PC case?
A: The PSU is approximately 210 mm long, so case compatibility must be checked against the case’s PSU clearance, cable space, and drive-tray layout. In some cases, installing a PSU of this size may require removing or repositioning drive trays.
Q: Is the PRIME PX-1600 quiet enough for a high-end workstation?
A: The model is designed for low noise with a 135 mm fluid-dynamic-bearing fan, hybrid fan control, and a Cybenetics Lambda A noise rating in the provided specifications. However, community reports indicate that perceived noise can vary by system load and unit, so it should not be assumed to be completely silent.