How to choose the right fans for your PC build Is your PC too...
How to choose the right fans for your PC build
Is your PC too hot? Too dusty? Too loud? You might need to think a little more about your cooling.
Join Jacob as he goes through the things you need to know to buy the best fans for your PC. From size, noise level, bearing type, and whether you should favor static pressure or airflow for the best results. He also very succinctly explains the differences between normal and reversed fans. And he's very handsome. Okay, it's me, I'm Jacob, they have no control over me here.
Watch the video.
0:00 - Introduction 0:17 - Does size matter? 01:55 - Static pressure vs airflow 04:27 - RPM and noise 06:17 - Types of fans 08:30 - Ecosystems and daisy- chaining 09:52 - Verdict
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Selecting the right fans is a foundational step in building a PC that stays cool, quiet, and reliable. The right combination depends on your case, components, and personal priorities—whether you chase maximum air throughput, whisper-quiet operation, or a balance of both. This guide walks you through the essential considerations and practical steps to help you make an informed decision.
1) Understand the basics - Fan sizes: Common sizes are 120mm, 140mm, and 92mm. Larger fans can move more air at lower RPMs, often reducing noise. Some cases and coolers support 80mm or 92mm fans, but those sizes are less common today. - Static pressure vs. airflow: Axial fans (the typical case fans) mainly provide airflow. High static pressure fans excel at moving air through restricted spaces like radiators, heatsinks, or dust filters. If you’re pairing fans with a radiator, prioritize static pressure. For general case cooling with open airflow, axial fans with good CFM (cubic feet per minute) are fine. - Noise levels: Measured in decibels (dBA). A comfortable noise range for a typical desktop is roughly 20–35 dBA under load, but perception varies with case design and fan speeds.
2) Align fans with your cooling goals - Airflow-focused builds: If you want to push a lot of air through the case to cool multiple components, choose higher CFM axial fans. Look for fans with good bearing design and low noise at higher RPMs. - Silence-focused builds: Favor larger diameter fans (e.g., 140mm) with low maximum RPM and low noise-to-CFM ratio. High-quality bearings and vibration dampening matter more here. - Radiator or heatsink setups: For radiators, static pressure is key. Look for fans marketed as high static pressure, with tight blade designs and reinforced housings to maintain performance under pressure.
3) Consider the case and mounting options - Case size and fan compatibility: Check your case’s supported fan sizes and placements. Some cases have pull/push configurations that affect how you route cables and manage airflow. - Intake vs. exhaust balance: A common approach is positive or neutral pressure to reduce dust and maintain component temperatures. Plan for a slight balance skewed toward intake to raise ambient temps slightly but improve cooling efficiency if you have hot components. - Front intake, top exhaust, rear exhaust: This conventional setup promotes front-to-back airflow. Ensure there’s clearance for radiator or fan height and that grills or filters won’t choke airflow.
4) Evaluate bearings and durability - Bearing types: Sleeve, ball bearing, hydraulic/pivot, and magnetic bearings each have trade-offs. Ball bearings are durable but can be noisier over time; hydraulic and fluid-dynamic bearings often offer quieter long-term operation. Consider warranty length as a practical indicator of durability. - Vibration and mounting: Look for anti-vibration mounts or silicone dampening, especially for fans mounted directly to the case or to a radiator. Rubber pads at the corners can significantly reduce perceived noise.
5) Look beyond specs: real-world performance matters - CFM vs. dBA curves: Manufacturers provide charts, but real-world results vary by case and fan interaction. Seek reviews that test fans in similar setups to yours, ideally with measurements of noise at operating temperatures. - Fan curves: Some fans come with customizable PWM control or software controls. A well-tuned fan curve can keep temperatures in check while minimizing noise during idle and ramping up only when needed. - RGB and aesthetics: If lighting or appearance matters, ensure the fan design supports your build’s look without compromising acoustic performance. Some premium fans offer quiet operation with stylish LEDs or diffusers.
6) Practical selection steps - Step 1: List your constraints. Note your case model, radiator size (if applicable), PSU clearance, and whether you prioritize silence or performance. - Step 2: Choose sizes. If your case supports both 120mm and 140mm, 140mm fans can provide better low-RPM efficiency and quieter operation. - Step 3: Decide on type. For radiators, pick high static pressure fans; for general case air, pick high-CFM axial fans with good bearings. - Step 4: Check compatibility. Ensure mounting holes align, clearance with RAM, GPU, and radiator, and that cables won’t obstruct airflow. - Step 5: Prioritize quality. Invest in reputable brands with solid bearings and warranties. It’s often worth paying a premium for durability and consistent performance.
7) Installation tips for optimal results - Use a balanced configuration: Avoid bottlenecks by ensuring intake and exhaust paths aren’t obstructed. A simple rule is to have slightly more intake than exhaust or maintain neutral pressure to reduce dust accumulation. - Cable management: Route fan headers to minimize cable clutter and airflow disruption. Use PWM fans if possible to enable dynamic speed control. - Filters and cleaning: Keep intake filters clean and replace them as needed. Dust reduces airflow and increases temperatures over time.
Conclusion Choosing the right fans is less about chasing the highest CFM and more about understanding your build’s airflow needs, case design, and noise tolerance. By prioritizing static pressure for radiators, airflow for general cooling, and reliable bearings for longevity, you can tailor a fan setup that keeps your PC cool, quiet, and ready for long sessions of productivity or gaming.
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