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Auotac 850W Fully Modular Power Supply, 80+ Gold vs Lian Li SX1200P Platinum Compact ATX Form Factor

Updated August 2026 — Lian Li SX1200P Platinum Compact ATX Form Factor leads on cable mgmt and warranty.

The Lian Li SX1200P offers superior power capacity and efficiency, making it a better choice for demanding builds, while the Auotac is a budget-friendly option.

Why Auotac 850W Fully Modular Power Supply, 80+ Gold is better

Price

Auotac is significantly cheaper at $79.99.

Warranty

Both have a 10-year warranty.

Basic Functionality

Auotac provides essential power supply functionality.

Why Lian Li SX1200P Platinum Compact ATX Form Factor is better

Power Capacity

Lian Li offers 1200W compared to Auotac's 850W.

Efficiency

Lian Li has 80 Plus Platinum certification.

Cooling Technology

Lian Li features smart cooling with fanless mode.

Overall score

Auotac 850W Fully Modular Power Supply, 80+ Gold
75
Lian Li SX1200P Platinum Compact ATX Form Factor
88

Specifications

SpecAuotac 850W Fully Modular Power Supply, 80+ GoldLian Li SX1200P Platinum Compact ATX Form Factor
Modular DesignFully ModularFully Modular
Cooling ModeStandard FanFanless Mode
Connector TypeDual-Color 16-PinPCIe 6+2
Capacitors105°C Japanese105°C Japanese
RGB LightingYesNo

Dimension comparison

Auotac 850W Fully Modular Power Supply, 80+ GoldLian Li SX1200P Platinum Compact ATX Form Factor

Price Comparison

When it comes to price, the Auotac 850W Fully Modular Power Supply is significantly cheaper than the Lian Li SX1200P Platinum, priced at $79.99 versus $159.99. This represents a price difference of about 50%, making the Auotac a more budget-friendly option for those looking for a quality power supply without breaking the bank. While the Lian Li is positioned as a premium product with extra features, the Auotac provides essential power supply functionality at a much lower cost.

Power Capacity

In terms of power capacity, the Lian Li SX1200P clearly outshines the Auotac, offering 1200W compared to the Auotac's 850W. This 41% increase in wattage allows the Lian Li to support more demanding builds, particularly those that require multiple high-end components or extensive peripherals. For users aiming for high-performance gaming rigs or workstation setups, the additional power capacity of the Lian Li may justify its higher price point.

Efficiency Ratings

The efficiency ratings of both power supplies are impressive, but the Lian Li SX1200P takes the lead with its 80 Plus Platinum certification. This ensures up to 92% efficiency at 50% load, which translates to lower heat output and energy consumption. The Auotac, while still efficient with its 80 Plus Gold certification, achieves 92% efficiency as well; however, it is slightly behind in terms of the overall efficiency rating. For those who prioritize energy savings and thermal performance, the Platinum certification of the Lian Li is a significant advantage.

Modular Design

Both the Auotac and the Lian Li feature fully modular designs, which help reduce cable clutter and improve airflow. However, the Lian Li includes super flexible braided cables, which enhance cable management even further, especially in tight spaces. The Auotac's dragon-patterned cables are functional but may not offer the same level of flexibility. Those who prioritize aesthetic appeal and optimal airflow in their builds may find the Lian Li's cable design more advantageous.

Cooling Technology

Cooling technology is another area where the Lian Li SX1200P excels, featuring smart cooling technology that allows for a fanless mode at low loads (≤40%). This results in silent operation during less demanding tasks, while still managing optimal temperatures during high loads. The Auotac, on the other hand, has a 140mm low-noise fan but does not mention a fanless mode. For users who desire a quiet computing experience, especially during light usage, the cooling capabilities of the Lian Li make it a better choice.

Connector Options

The connector options available on both power supplies cater to modern needs, but the Lian Li SX1200P offers more versatility with its ample PCIe 6+2 connectors. This allows for easy connection of multiple accessories, such as USB hubs and additional fans, providing a more adaptable setup for complex builds. The Auotac includes a dual-color 16-pin cable specifically designed for high-end graphics cards, but it may lack the same level of expandability as the Lian Li. Users with more extensive hardware setups may find the connector options of the Lian Li to be more beneficial.

Warranty and Support

When it comes to warranty and support, both products offer a 10-year limited warranty, providing peace of mind for consumers. However, the Lian Li also highlights its RMA support for missing parts or cable color issues, which can be a significant advantage for users who may encounter issues. The Auotac does not explicitly mention a similar support system. This additional layer of customer service from the Lian Li may appeal to users looking for a reliable purchasing experience.

Which should you buy?

Ultimately, the decision between the Auotac 850W Fully Modular Power Supply and the Lian Li SX1200P Platinum comes down to individual needs and budget. If you are looking for a more economical option that still delivers solid performance, the Auotac is the clear winner at $79.99. However, if you require a higher power capacity, superior efficiency, and enhanced cooling technology, the Lian Li, priced at $159.99, may be worth the investment. Each power supply has its strengths, making them suitable for different types of users and builds.