Lian Li UNI Fan SL-INF 120 Review: 8.5/10 - Stunning Infinite Mirror RGB With Modular Design
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The Lian Li UNI Fan SL-INF 120 is the best choice for builders who prioritize aesthetics as much as performance.
PC builders looking for quiet, efficient cooling performance and styling from the Lian Li UNI Fan SL-INF 120
your current fans keep temps in check or the $35 price for Lian Li UNI Fan SL-INF 120 isn't justified for your build
Prices last checked July 2, 2026
Overview
The Lian Li UNI Fan SL-INF 120 is the epitome of modern PC fan design, combining breathtaking dual-layer infinite mirror RGB lighting with Lian Li’s ingenious tool-free interlocking system. Each fan connects to its neighbor via slide-in latches and a single bridge connector for power, RGB, and PWM - dramatically reducing cable clutter in visually-focused builds. At $35 per fan or $150 for a 3-pack with controller, they command a premium over value fans like the $9 Arctic P12, but for builders who prioritize aesthetics alongside solid performance, the SL-INF delivers an exceptional visual experience.
Design & Build
The SL-INF is a visual masterpiece. Both sides of the fan feature a mirrored infinity-mirror effect with a central RGB ring and outer LED ring that create the illusion of endless depth. The lighting is powered by 40 addressable LEDs per fan, split between the inner and outer rings. The fan blades themselves are translucent, allowing light to diffuse through them for a subtle glow. The aluminum frame with brushed metal accents adds premium tactile quality. The interlocking design is brilliant: each fan has male contacts on one side and female on the other, so fans snap together physically and electrically without any cables between them. A single cable from the last fan in the chain connects back to the controller. Build quality is excellent - the aluminum frame feels rigid, the latching mechanism clicks securely, and the blades spin true with no wobble.
Performance
Thermal performance is solid if not class-leading. The SL-INF moves 61.3 CFM at maximum 2100 RPM with 3.0 mm H₂O static pressure - respectable figures that place it in the upper tier of RGB fans. On a 360 mm radiator, the SL-INF at full speed keeps temperatures competitive with high-end non-RGB fans, though at a slightly higher noise cost. The maximum noise rating of 29 dBA reflects the focus on airflow through a somewhat restrictive frame design. At lower speeds (800-1200 RPM), the fan is reasonably quiet, with the fluid dynamic bearing eliminating mechanical noise. However, the infinite mirror design does introduce some airflow restriction through the center hub area, meaning these fans perform slightly better as case exhaust or intake fans than on high-density radiators. The FDB bearing is rated for long-term reliability.
Features
| |The SL-INF uses Lian Li’s proprietary UNI system for tool-free fan linking. Up to four fans can be daisy-chained together with a single cable to the included PWM/RGB controller. The controller supports multiple fans groups and syncs with Lian Li’s L-Connect 3 software for granular RGB control, fan curves, and lighting profiles. The software supports motherboard ARGB sync via 3-pin header. The 3-pack includes the controller and all necessary cables. Individual fan packs are available for expansion. The infinite mirror effect works on both intake and exhaust orientations, so fans look stunning from any viewing angle.
Pros
- Stunning dual-layer infinite mirror RGB lighting - 40 addressable LEDs per fan
- Tool-free interlocking design eliminates visible fan cables - snap together with no cables between fans
- Solid 61.3 CFM airflow with 3.0 mm H₂O static pressure - strong for an RGB fan
- Premium aluminum frame with brushed metal finish - outclasses plastic RGB rivals
- 40 addressable LEDs per fan for granular lighting control
- L-Connect 3 software offers extensive customization
- Works in both intake and exhaust orientations
- Individual and multi-pack options available
Cons
- Expensive at $35 per fan (or $150 for 3-pack)
- Maximum noise of 29 dBA is audible at full speed
- Infinity mirror hub restricts radiator airflow somewhat
- Requires proprietary controller for full RGB functionality
- L-Connect 3 software can be resource-heavy
- Fan linking limits fan placement flexibility
- RGB cables add bulk when not using the full ecosystem
- PWM control range narrows at very low speeds
Verdict
The Lian Li UNI Fan SL-INF 120 is the best choice for builders who prioritize aesthetics as much as performance. The infinite mirror RGB effect is genuinely stunning and unique, and the tool-free interlocking system makes for the cleanest fan installation available. Performance is good enough for most use cases, though noise-conscious users and radiator enthusiasts may prefer traditional fans. If you are building a showpiece PC where visuals matter, the SL-INF delivers an exceptional combination of beautiful lighting and clean cable management.
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Technical Specifications
How We Scored This Product
Every product on ComfyTechCheck is scored on a 1 to 10 scale across four criteria. Each criterion is weighted differently depending on the product category to reflect what matters most to real buyers.
- Performance & Capabilities 40% Speed, accuracy, quality of output in its category.
- Build & Design Quality 30% Materials, construction quality, durability, form factor.
- Consumer Value 20% Price-to-performance ratio relative to direct competitors.
- User Experience 10% Ease of setup, daily usability, comfort, ergonomics.
Scores are assigned by our editorial team after hands-on testing or extensive research using verified user reports, expert analysis, and technical specifications. For the full weight breakdown by category, visit our How We Rate page.