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Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W8.8Our score 4 photos
LLBrandLian LiLLLian Li7 products in our catalogSee all Lian Li products →ID DBD-18576

Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W

8.8/10 our score 4.4 (86 ratings on Amazon)

Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup wi

Form FactorATX

About this item

  • Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup without limitations for any build.
  • Smart Cooling Technology: Features fanless mode at ≤40% load for silent operation, while maintaining optimal temperatures during high loads for enhanced performance and longevity. Fanless mode off for excellent noise control.
  • Flexible Braided Cables: Super flexible DC cables facilitate effortless cable management, reducing clutter and improving airflow in tight or complex builds.
  • 80 Plus Platinum Certified: Achieves up to 92% efficiency at 50% load, ensuring cooler, quieter, and more energy-efficient operation with stable voltage regulation.
Category: PC Parts › Internal Power SuppliesRanked #99 of 616 in PC Parts
8.8Our score
Our verdict

Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup wi

Ranked #99 in PC Parts · 4 things we like

Quick answer The Lian Li SX1200P Platinum Compact ATX PSU scores 8.8/10 with us. Amazon owners rate it 4.4 out of 5 across 86 reviews, in line with the 4.5 average of the 82 internal power supplies we track. It was listed at $159.99 on Amazon when we last checked in September 2026.

Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup without limitations for any build. Smart Cooling Technology: Features fanless mode at ≤40% load for silent operation, while maintaining optimal temperatures during high loads for enhanced performance and longevity. Fanless mode off for excellent noise control.

Flexible Braided Cables: Super flexible DC cables facilitate effortless cable management, reducing clutter and improving airflow in tight or complex builds. 80 Plus Platinum Certified : Achieves up to 92% efficiency at 50% load, ensuring cooler, quieter, and more energy-efficient operation with stable voltage regulation. 105°C-Rated Capacitors: Built with 100% Japanese 105°C-rated capacitors for exceptional durability and stable performance, even under high thermal stress.

RMA Support: Missing pa

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Product information

22 specifications
Compatible DevicesComputer System, Graphics Card, Motherboard, Processor, Internal Components
Connector Type Used on CablePCI Express
Output Wattage1200 watts
Form FactorATX
Wattage1200 watts
Cooling MethodAir
Number of Fans1
Maximum Input Voltage120 volts_of_alternating_current
Minimum Input Voltage110 volts_of_alternating_current
System Bus Connector Type24 Pin
Item Dimensions5.91 x 3.39 x 5.51 inches
Item Weight3.27 kg
EU Spare Part Availability Duration10 years
Item HighlightSXP Compact ATX Form Factor, 12V-2x6 Cable, ATX 3.1 & PCIE 5.1 Compliant, Cybenetics Platinum Efficiency
Model NameSX1200P.W
BrandLian Li
Number of Items1
Unit Count1 Count
Model NumberSX1200P.W
Mfr Part NumberSX1200P.W
Warranty Description1 year
Connector TypePCI Express

Pros & cons

What we like
  • Ample PCIe 6+2 Connectors: Easily power multiple accessories, including the LIAN LI Universal USB and fan hub, ensuring a versatile setup without limitations for any build.
  • Smart Cooling Technology: Features fanless mode at ≤40% load for silent operation, while maintaining optimal temperatures during high loads for enhanced performance and longevity. Fanless mode off for excellent noise control.
  • Flexible Braided Cables: Super flexible DC cables facilitate effortless cable management, reducing clutter and improving airflow in tight or complex builds.
  • 80 Plus Platinum Certified : Achieves up to 92% efficiency at 50% load, ensuring cooler, quieter, and more energy-efficient operation with stable voltage regulation.
What could be better

    Lian Li SX1200P Platinum Compact ATX PSU: questions & answers

    Is the Lian Li SX1200P Platinum Compact ATX PSU worth buying?

    Yes, it is one of the stronger picks in its group. We score the Lian Li SX1200P Platinum Compact ATX PSU 8.8 out of 10. Amazon owners rate it 4.4 out of 5 across 86 reviews, in line with the 4.5 average of the 82 internal power supplies we track.

    How much does the Lian Li SX1200P Platinum Compact ATX PSU cost?

    It was listed at $159.99 on Amazon when we last checked in September 2026. That is more than the $82.99 median for internal power supplies in our catalog. Amazon prices change daily, so use the price button on this page to see the current figure.

    What options does the Lian Li SX1200P Platinum Compact ATX PSU come in?

    Amazon lists 6 options. Size: 1000 Watts, 850 Watts, 1200 Watts. Color: Black, White. Pick an option on this page and the button opens exactly that model.

    What are good alternatives to the Lian Li SX1200P Platinum Compact ATX PSU?

    Similar, well-rated internal power supplies in our catalog: LIAN LI Edge Gold 1000W ATX 3.1 PSU (9.4/10, 4.7 stars from 191 owners); ASUS ROG Thor 1200W Platinum III PSU (8.4/10, 4.2 stars from 77 owners); be quiet! Power Zone 2 1200W (9.6/10, 4.8 stars from 13 owners).

    LIAN LI Edge Gold 1000W ATX 3.1 PSUASUS ROG Thor 1200W Platinum III PSUbe quiet! Power Zone 2 1200W

    Customer reviews

    All reviews on Amazon
    4.486 global ratings
    5 star86%
    4 star0%
    3 star0%
    2 star0%
    1 star14%

    Breakdown from the 7 most helpful reviews we imported.

    J
    John 905
    Verified purchaseAugust 13, 2026
    Fantastic product

    This Liam Li SX1200 platinum compact ATX power supply is fantastic. Several mounting options does not take up a lot of space and plenty of cables for connecting all of your devices.

    C
    CYPH3R
    Verified purchaseAugust 11, 2026
    Quality

    Excellent product

    A
    Arle
    Verified purchaseAugust 18, 2026
    Buena calidad de producto 👌

    Llegó tal cual, solo que el empaque en la parte de atrás llego rasgado, no tengo idea en que trayecto habra afectado

    I
    Illiad
    Verified purchaseMarch 4, 2026
    Great PSU for 5090

    Solid PSU, my main comparison is the 1300 Lian Li Edge series.The native 600 watt 12VHPWR cable here was an improvement over the Lian Li edge, fit snugly into my 5090 but wasn’t impossible to pull back out either. Braided cables are nice but wish they had the Velcro cable ties as well, were not included like in Lian Li edge series.

    G
    Geovanny
    Verified purchaseMay 14, 2026
    Good psu

    I just installed it in my case so far all is good

    J
    JR
    Verified purchaseNovember 21, 2025
    One version of this product is excellent...the other a dudd.

    I had ordered this product previosly and was impressed with the quality and gave it 5 stars. So I ordered another. The second was DOA, "dead on arrival" and did not look anything like the orginal which looked like the sample in the following link: https://www.amazon.com/s?k=1200w+psu+lian+li&adgrpid=187926087513&hvadid=779541014343&hvdev=c&hvexpln=0&hvlocphy=9209133&hvnetw=g&hvocijid=17665227533099008402--&hvqmt=e&hvrand=17665227533099008402&hvtargid=kwd-2374793759889&hydadcr=24333_13533857_2334830&mcid=c5d94ecfd6883437bfecc16b85b77a3d&tag=googhydr-20&ref=pd_sl_77sx3j94dl_eNotice the baffling

    S
    Sebastian martinez
    Verified purchaseMay 17, 2026
    Muy buen producto

    Muy buen producto, no he tenido ningún problema. Muy bueno para su precio!!

    Customer reviews are shown as published on Amazon and are not written by Do Best Deal.