Lian Li
Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W
Bottom line: The Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W is a specs-and-price decision rather than a crowd-consensus one in the power supplies category, priced around $159.99 on Amazon as of 2026-10-06. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Backed by Lian Li's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
SpecPicks Verdict
SpecPicks scored Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Lian Li's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- 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 parts or cable color issues? Reach out to us for quick support or replacement.
Full Specifications
| Brand | Lian Li |
|---|---|
| Wattage | 1200 watts |
| Dimensions | 150 x 86 x 140 mm |
| Model Name | SX1200P.W |
| Unit Count | 1 Count |
| Form Factor | ATX |
| RMA Support | Missing parts or cable color issues? Reach out to us for quick support or replacement. |
| Connectivity | USB |
| Model Number | SX1200P.W |
| Connector Type | PCI Express |
| Cooling Method | Air |
| Number of Fans | 1 |
| Output Wattage | 1200 watts |
| Item Dimensions | 5.91 x 3.39 x 5.51 inches |
| Mfr Part Number | SX1200P.W |
| Number of Items | 1 |
| Compatible Devices | Computer System, Graphics Card, Motherboard, Processor, Internal Components |
| Product Dimensions | 5.9"W x 3.4"H x 5.5"D (150 x 86 x 140 mm); equipped with a 120 mm FDB fan with maximum fan speed of 2,000 RPM. |
| Warranty Description | 1 year |
| Maximum Input Voltage | 120 volts_of_alternating_current |
Ready to buy?
Lian Li SX1200P Platinum Compact ATX PSU 1200W-ATX 3.1-White-SX1200P.W is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Related Power Supplies
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- How to Build a Windows 98 Retro PC in 2026
- Best 1440p Gaming GPUs in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
More reviews from the SpecPicks archive
Browse all reviews →- MSI RTX 3060 12GB in 2026: Still the Right 1080p GPU?
- Best Raspberry Pi for a Touchscreen Home Dashboard in 2026
- Claude Opus 4.8 Raised the Bar — Best Local Coding LLMs for a 12GB RTX 3060
- Gemma 4 31B Heretic Finetune: Can It Run on a 12GB RTX 3060?
- NVIDIA RTX A6000 48GB Review: The Workstation Card That Still Owns Local 70B Inference (2026)
- Quiet RTX 3060 12GB Local LLM Box: Build Notes from a Real Setup
- What a $15 Raspberry Pi Zero W Can Still Do in 2026
- Self-Hosting Foundry VTT: Raspberry Pi 4 vs an Old i7-9700K Box
- Best Gaming Setup for Kids and Teens in 2026: 5 Picks
- Inkling: The New US Open-Weights Leader — Can You Run It Locally?
- Can the Ryzen 5 5600G Run Local LLMs Without a GPU?
- AMD Ryzen Buying Guide 2026: Every Tier Compared
- Raspberry Pi OS Moves to the Linux 6.18 LTS Kernel With an Updated LabWC Compositor
- Why You Shouldn't Leave Model Selection on Default in Copilot, Gemini, and Other AI Tools
- Best Controllers for Retro Gaming and Emulation in 2026
- Self-Hosting Jellyfin on a Ryzen 5 5600G: 4K Transcode on the Cheap
- Intel Core Ultra 5 250K Plus vs Ryzen 5 7600X3D: The Mid-Range Faceoff
- Best CPU Cooler for AM4 Ryzen Overclocking in 2026
- RTX 3060 12GB vs Arc B580 for 1080p Gaming: Which Wins?
- Qwen3.6-35B-A3B on an 8GB Laptop: What the Krasis Benchmark Means for Local Inference
- Best Wireless Productivity Keyboards Under $50 in 2026
- Asus ROG Xreal R1 AR glasses pre-orders start today at $849 — 240 Hz virtual gaming at 171 inches on PC…
- Self-Host Immich Photo Backup on a Raspberry Pi 4 8GB in 2026
- Blue Yeti vs HyperX QuadCast 2: Best Budget Streaming Mic Setup in 2026
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090