Lian Li 1000W Platinum ATX 3.1 Alternatives: 6 Similar Picks Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
The Lian Li SX1000P Platinum is a compact 1000W ATX 3.1 power supply designed for builders who need high efficiency in a small footprint. If you are looking for lian li sx1000p platinum compact atx alternatives, this list covers 6 similar picks that match its core specifications. The original unit stands out for its 80 Plus Platinum certification and fanless mode under 40% load, which ensures silent operation during low-demand tasks. Its 120 mm fan and Japanese 105°C capacitors provide durability and stable voltage regulation. However, you might prefer a different brand or a slightly larger form factor for easier cable management. Some users may also want a different efficiency rating or a more standard size for their specific case.
We selected these alternatives because their published specs overlap with the Lian Li model. Each option offers 1000W output and ATX 3.1 compatibility, ensuring they can support modern PCIe 5.1 GPUs. The list includes units with Gold and Platinum certifications, as well as various color options like black and white. You will find choices that prioritize quiet cooling, compact dimensions, or standard ATX dimensions. This guide helps you compare these specifications side by side to find the best fit for your build requirements.
Our top pick: Lian Li 1000W Platinum ATX 3.1 Power Supply.
How these alternatives compare
Corsair RM1000x Shift 1000W ATX 3.1 PSU
The Corsair RM1000x Shift uses micro-fit connectors to save space inside the case, a feature the Lian Li does not highlight. It shares the 1000W output and ATX 3.1 standard but weighs less at 4.2 pounds. You get quiet low-load performance similar to the Lian Li fanless mode. The Corsair unit is slightly longer at 7.09 inches. This choice suits builders who prioritize cable management flexibility and a lighter overall system weight without sacrificing compact dimensions.
NZXT C1000 Gold 1000W ATX Power Supply
The NZXT C1000 Gold offers fully modular cabling and a lower efficiency rating of Gold instead of Platinum. It maintains the 1000W capacity and ATX 3.1 compliance. The unit is wider at 5.91 inches and heavier at 7.87 pounds compared to the Lian Li. You trade some efficiency for potentially simpler cable management. This option works well for users who value silent operation and reliable performance in mid-to-high-end gaming rigs without needing the highest efficiency tier.
1ST Player NGDP 1000W ATX 3.1 PSU
The 1ST Player NGDP features an 80 Plus Gold rating, which is lower than the Lian Li Platinum certification. It shares the same compact ATX dimensions of 5.91 by 3.39 inches. The unit is fully modular and designed for quiet, efficient standard builds. You give up the higher efficiency tier but retain the small footprint. This pick fits users who prioritize high efficiency ratings and silent operation over maximum fan size or Platinum-tier certification levels.
Seasonic Focus GX-1000 White
The Seasonic Focus GX-1000 provides verified dual efficiency certifications, offering a different value proposition than the Lian Li Platinum. It shares the 1000W output and ATX 3.1 standard. The unit is slightly wider at 5.9 inches and lighter at 3.65 pounds. You gain verified efficiency credentials but lose the compact depth of the Lian Li. This choice suits builders who prioritize verified efficiency certifications over maximum compactness or Platinum-tier ratings for their power supply needs.
MSI 1000W Fully Modular Gold PSU
The MSI MPG A1000GS is a standard ATX unit with a much larger footprint, measuring 11.5 inches in length. It offers an 80 Plus Gold rating and a 10-year warranty. The unit supports PCIe 5.1 and includes a 12V-2x6 connector. You sacrifice compact size for a longer warranty and standard dimensions. This option is ideal for gamers who prioritize value and long-term coverage over Platinum efficiency or the tight fit of a compact power supply.
be quiet! Power Zone 2 1000W Platinum ATX 3.1
The be quiet! Power Zone 2 matches the Lian Li with an 80 Plus Platinum rating and ATX 3.1 support. It shares the PCIe 5.1 compatibility. The unit is larger, measuring 7 inches in length and 6 inches in height. You gain a reputable brand name for quiet operation but lose the compact depth of the Lian Li. This pick is best for users building modern high-end PCs or creation workstations who need high efficiency and quiet performance in a standard form factor.
Quick picks
Our 7 picks
Lian Li 1000W Platinum ATX 3.1 Power Supply
Best for: Compact high-efficiency builds
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Platinum, Cybenetics Platinum
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6, PCIe 6+2
- Fan Size
- 120 mm
- PCIe Version
- PCIe 5.1
View on Amazon: Lian Li 1000W Platinum ATX 3.1 Power Supply Affiliate link
The Lian Li SX1000P is a compact 1000W power supply built for high-end builds. It carries 80 Plus Platinum certification for high efficiency and supports ATX 3.1 standards. The unit includes flexible braided cables and features smart cooling with fanless mode at low loads. It uses 105°C-rated Japanese capacitors for stability. This white PSU fits well in cases where space is tight but power needs are high.
Pros
- 80 Plus Platinum efficiency rating
- ATX 3.1 standard support
- Fanless operation up to 40% load
- Compact 150 x 86 x 140 mm form factor
- 105°C-rated Japanese capacitors
Cons
- Smaller 120 mm fan limits airflow compared to 135 mm models
- White color option may not suit all builds
- No mention of USB-C PD output for displays
Good fit if
- You need a compact 1000W unit for a small case
- You want silent operation during light computing tasks
- You prefer white cables for a clean build aesthetic
Skip if
- You require a 135 mm fan for quieter high-load performance
- You need black cables to match your case
- You want a 12V-2x6 native connector for latest GPUs
Verdict: Lian Li SX1000P 1000W ATX 3.1 is a strong choice for builders needing high efficiency in a small footprint. It suits those prioritizing silent low-load operation and compact dimensions over larger fan sizes.
Corsair RM1000x Shift 1000W ATX 3.1 PSU
Best for: Compact builds needing quiet ATX 3.1 power
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- PCIe 5.1
- Dimensions
- 7.09 × 5.91 × 5.08 inches
View on Amazon: Corsair RM1000x Shift 1000W ATX 3.1 PSU Affiliate link
The Corsair RM1000x Shift is a 1000W fully modular power supply built for ATX 3.1 systems. It features a compact 5.91 by 5.08 by 7.09 inch form factor and supports PCIe 5.1. The unit uses micro-fit connectors to save space and includes zero RPM fan mode for quiet operation at low loads. It is designed for users who need high efficiency in a small chassis.
Pros
- ATX 3.1 and PCIe 5.1 certified
- Compact micro-fit modular design
- Zero RPM fan mode for silence
- Japanese electrolytic capacitors for reliability
Cons
- Heavier at 4.2 pounds
- Only available in black
- No remote or app control
Good fit if
- You need a compact ATX 3.1 power supply
- You want near-silent operation at low loads
- You prefer fully modular cable management
Skip if
- You require multiple color options
- You need smart monitoring features
- You prefer a standard non-shift connector layout
Verdict: Corsair RM1000x Shift ATX 3.1 fits users who prioritize space-saving micro-fit connectors and quiet low-load performance in a compact 1000W unit.
NZXT C1000 Gold 1000W ATX Power Supply
Best for: quiet operation and efficiency
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135mm
View on Amazon: NZXT C1000 Gold 1000W ATX Power Supply Affiliate link
This NZXT power supply delivers 1000W of stable power with ATX 3.1 compliance. It features a 135mm fan that stays silent under 50% load. The unit holds 80 PLUS Gold and Cybenetics Gold certifications for efficiency. You get fully modular cables and a 12V-2x6 connector for modern GPUs. It is a practical option for builders seeking quiet operation and high efficiency.
Pros
- 135mm fan with Zero Fan Mode for silent operation
- 80 PLUS Gold and Cybenetics Gold efficiency ratings
- ATX 3.1 standard with 12V-2x6 connector
- Fully modular cable design
Cons
- 80 PLUS Gold rating is lower than Platinum competitors
- Cybenetics A Noise Level lacks specific decibel data
- Heavier build at 7.87 pounds
Good fit if
- You prioritize low noise under light loads
- You need ATX 3.1 compatibility for new GPUs
- You want high efficiency with Gold certification
Skip if
- You require Platinum efficiency for maximum savings
- You need ultra-compact dimensions for small cases
- You prefer lighter power supplies for easy handling
Verdict: NZXT C1000 Gold 1000W ATX 3.1 suits users who value silent performance and reliable efficiency. It is a solid choice for mid-to-high end gaming rigs that need quiet operation.
1ST Player NGDP 1000W ATX 3.1 PSU
Best for: Quiet, efficient standard ATX builds
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold, PPLP Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 120mm
View on Amazon: 1ST Player NGDP 1000W ATX 3.1 PSU Affiliate link
The 1ST Player NGDP 1000W is a fully modular power supply built for ATX 3.1 systems. It carries 80 PLUS Gold and PPLP Platinum efficiency ratings, ensuring over 88.7% efficiency at full load. A 120mm fan with zero RPM mode keeps noise low. It includes a native 12V-2x6 connector for PCIe 5.1 GPUs. This unit suits builders seeking high efficiency and quiet operation in a standard ATX form factor.
Pros
- 1000W output with ATX 3.1 and PCIe 5.1 support
- 80 PLUS Gold and PPLP Platinum efficiency certifications
- Fully modular design with embossed cables
- 120mm FDB fan with zero RPM mode
- 10-year full replacement warranty
Cons
- 120mm fan is smaller than the 135mm or 140mm fans in many competitors
- Gold rating is one tier below the Platinum ratings of most alternatives
- Standard ATX dimensions may not fit compact chassis as well as smaller units
Good fit if
- You need a fully modular PSU with high efficiency ratings
- You want a quiet system with zero RPM fan mode
- You are building a standard ATX case with PCIe 5.1 GPUs
Skip if
- You require Platinum efficiency certification
- You are building in a compact SFX or SFX-L case
- You prefer a larger 135mm or 140mm fan for thermal headroom
Verdict: 1ST Player 1000W Gold ATX 3.1 delivers strong efficiency and quiet cooling for standard ATX builds. It fits users who prioritize high efficiency ratings and silent operation over maximum fan size or Platinum certification.
Seasonic Focus GX-1000 White
Best for: builders wanting dual efficiency certifications
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
View on Amazon: Seasonic Focus GX-1000 White Affiliate link
The Seasonic Focus GX-1000 delivers 1000W of power with ATX 3.1 and PCIe 5.1 support. It features a native 12V-2x6 connector for modern GPUs. The unit holds both 80 PLUS Gold and Cybenetics Gold certifications. A 135 mm fan with hybrid control keeps noise low. This white model suits builders who want verified efficiency and reliable power delivery.
Pros
- Native 12V-2x6 connector for PCIe 5.1
- Dual 80 PLUS Gold and Cybenetics Gold certification
- 135 mm fan with hybrid fan control
- OptiSink design for thermal management
Cons
- 80 PLUS Gold rating is lower than the Platinum options on this list
- Standard ATX form factor is larger than the Lian Li SX1000P compact model
- Cybenetics certification is Gold, not the higher Lambda Platinum tier
Good fit if
- You want dual efficiency certifications for peace of mind
- You prefer a white power supply for your build
- You need a native 12V-2x6 connector for new GPUs
Skip if
- You require a Platinum efficiency rating
- You need a compact SFX or small ATX form factor
- You want the smallest possible power supply dimensions
Verdict: The Seasonic Focus GX-1000 White ATX 3.1 is a reliable mid-range option for users who prioritize verified efficiency certifications over maximum compactness or Platinum-tier ratings.
MSI 1000W Fully Modular Gold PSU
Best for: Gamers needing PCIe 5.1 support and long warranty
- Wattage
- 1000W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI 1000W Fully Modular Gold PSU Affiliate link
This 1000W power supply meets ATX 3.1 standards and supports PCIe 5.1. It carries an 80 Plus Gold efficiency rating and uses fully modular cabling. The unit includes dual 12V-2x6 cables for modern GPUs. You get a 10-year warranty on this black, fully modular unit. It suits gamers who want reliable power delivery without the premium Platinum tier price.
Pros
- 80 Plus Gold efficiency certification
- 10-year manufacturer warranty
- Fully modular cable design
- Supports ATX 3.1 and PCIe 5.1
- Dual 12V-2x6 connectors included
Cons
- 80 Plus Gold rating is lower than the Platinum tier options on this list
- Standard ATX dimensions are larger than the compact alternatives
- Heavier build at 8.82 pounds compared to lighter competitors
Good fit if
- You need a fully modular PSU with PCIe 5.1 support
- You want a 10-year warranty for long-term reliability
- You prefer Gold efficiency for a balance of cost and performance
Skip if
- You require Platinum efficiency for maximum energy savings
- You are building in a small form factor case
- You want the most compact ATX power supply available
Verdict: MSI MPG A1000GS 1000W Gold PSU offers solid ATX 3.1 specs and a 10-year warranty for gamers who prioritize value over Platinum efficiency or compact size.
be quiet! Power Zone 2 1000W Platinum ATX 3.1
Best for: quiet high-end gaming and creation workstations
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Platinum, Cybenetics Platinum
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6, PCIe 6+2-pin
- Fan Size
- 140mm
- Warranty
- 10-Year
View on Amazon: be quiet! Power Zone 2 1000W Platinum ATX 3.1 Affiliate link
This 1000W ATX 3.1 power supply features 80 PLUS Platinum efficiency and a 140mm fan. It supports PCIe 5.1 with a 12V-2x6 connector and handles transient loads up to double its rated power. The semi-passive zero-RPM mode keeps noise low at idle. It suits users building high-end systems who prioritize quiet operation and future-proof connectivity.
Pros
- 80 PLUS Platinum and Cybenetics Platinum certified efficiency up to 94.0%
- ATX 3.1 standard with native 12V-2x6 connector for PCIe 5.1 GPUs
- 140mm Pure Wings 3 fan with semi-passive zero-RPM cooling mode
- Handles power excursions up to double the rated 1000W capacity
Cons
- Includes only one 90-degree angled 12V-2x6 connector in the box
- Requires a 2-5 minute cooldown period after fan stops to prevent rapid cycling
- Standard ATX form factor dimensions may not fit smaller cases
Good fit if
- You need native PCIe 5.1 support for next-generation graphics cards
- You prioritize silent operation with a large 140mm fan and zero-RPM mode
- You build a high-end system requiring stable power under massive transient loads
Skip if
- You require multiple 12V-2x6 connectors included with the power supply
- You need a compact SFX or smaller form factor power supply
- You want a fully active cooling mode without any post-ventilation delay
Verdict: be quiet! Power Zone 2 1000W delivers high efficiency and quiet operation for users building modern high-end PCs with PCIe 5.1 GPUs.
Specifications side by side
| Spec | Lian Li 1000W Platinum ATX 3.1 Power Supply | Corsair RM1000x Shift 1000W ATX 3.1 PSU | NZXT C1000 Gold 1000W ATX Power Supply | 1ST Player NGDP 1000W ATX 3.1 PSU | Seasonic Focus GX-1000 White | MSI 1000W Fully Modular Gold PSU | be quiet! Power Zone 2 1000W Platinum ATX 3.1 |
|---|---|---|---|---|---|---|---|
| Wattage | 1000W | 1000W | 1000W | 1000W | 1000W | 1000W | 1000W |
| Efficiency Rating | 80 Plus Platinum, Cybenetics Platinum | 80 PLUS Gold | 80 PLUS Gold, Cybenetics Gold | 80 PLUS Gold, PPLP Platinum | 80 PLUS Gold, Cybenetics Gold | 80+ Gold | 80 PLUS Platinum, Cybenetics Platinum |
| Modularity | not stated | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | not stated |
| ATX Version | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6, PCIe 6+2 | PCIe 5.1 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6, PCIe 6+2-pin |
| Fan Size | 120 mm | not stated | 135mm | 120mm | 135 mm | not stated | 140mm |
| Warranty | not stated | not stated | 10-year | 10-year | 10 Years | 10 Year | 10-Year |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| PCIe Version | PCIe 5.1 | PCIe 5.1 | not stated | not stated | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 |
| Recommended Use | not stated | not stated | not stated | not stated | not stated | Gaming | not stated |
| Connector | 12V-2x6 Connector | not stated | not stated | not stated | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector |
| Size | 1000W | 1000W | 1000W | 1000W | 1000W | 1000W | 1000W |
| Dimensions | 5.91 × 3.39 × 5.51 inches | 7.09 × 5.91 × 5.08 inches | 6.3 × 5.91 × 3.39 inches | 5.91 × 3.39 × 5.51 inches | 5.5 × 5.9 × 3.4 inches | 11.5 × 9.5 × 5.4 inches | 7 × 4 × 6 inches |
| Weight | 6.91 pounds | 4.2 pounds | 7.87 pounds | not stated | 3.65 pounds | 8.82 pounds | 7 pounds |
| Color | White | Black | White | Black | White | Black | Black |
| Model | SX1000P.W | CP-9020253-NA | PA-0G2BW-US | HA-1000BA4 | Focus GX-1000 White ATX 3.1 | MPG A1000GS PCIE5 | not stated |
If you also plan an enclosure upgrade, compare lian li mid tower atx PC case alternatives for clearance specifications.
Frequently asked questions
Which alternative offers the most compact form factor?
The Lian Li SX1000P and the 1ST Player NGDP share the smallest dimensions at 3.39 inches wide. This compact size suits small form factor builds where space is limited. Both units measure 5.91 inches in length, allowing them to fit into tighter chassis layouts compared to standard ATX units.
How does the Corsair RM1000x Shift differ in weight?
The Corsair RM1000x Shift is significantly lighter than most competitors on this list. It weighs only 4.2 pounds, making it one of the lightest options available. This reduced weight can be beneficial for builds where overall system mass is a concern, while still delivering 1000W of power.
Are there options with Platinum efficiency ratings?
Yes, the Lian Li SX1000P and the be quiet! Power Zone 2 both carry 80 Plus Platinum certification. These units deliver higher efficiency than Gold-rated models, reducing wasted energy as heat. The be quiet! unit also supports PCIe 5.1, ensuring compatibility with modern high-end graphics cards.
Which unit is best for quiet low-load operation?
The Lian Li SX1000P is specifically noted for silent low-load operation, making it ideal for users who prioritize quiet performance during light tasks. The Corsair RM1000x Shift also emphasizes quiet low-load performance. These features help maintain a peaceful environment when the system is not under heavy gaming loads.
Do these alternatives support the latest PCIe standard?
Most units on this list support ATX 3.1, which includes native PCIe 5.1 support. The Corsair RM1000x Shift, Seasonic Focus GX-1000, MSI MPG A1000GS, and be quiet! Power Zone 2 all explicitly list PCIe 5.1 compatibility. This ensures you can connect the latest GPUs without needing adapter cables.
Is full modularity standard across these picks?
Full modularity is a key feature for the NZXT C1000 Gold, the 1ST Player NGDP, and the MSI MPG A1000GS. This allows you to connect only the cables you need, reducing clutter inside your case. While not explicitly stated for every unit, fully modular designs are common in this class for cleaner builds.
What color options are available for these power supplies?
You can choose from white or black finishes depending on your build aesthetic. The Lian Li SX1000P, NZXT C1000 Gold, and Seasonic Focus GX-1000 come in white. The Corsair RM1000x Shift, 1ST Player NGDP, MSI MPG A1000GS, and be quiet! Power Zone 2 are available in black.