Testing PC Fan Configurations for Optimal Cooling

Fan Configuration Testing

• 💡 The video tests three different fan configurations in a PC build to determine the most temperature-efficient setup.
• 🎯 The goal is to chart temperature over time and find the optimal way to run fans for maximum cooling efficiency.

System Specifications

• 🖥️ The build features a Gigabyte X870E motherboard, AMD 9950X3D CPU, 32GB DDR5 8000MHz CL38 RAM, and an RTX 5090 Astral GPU with a Delta Mate water block.
• ❄️ Cooling is provided by two EK water blocks 30mm thick by 360mm radiators, with a 1200W be quiet! power supply.
• ⚡ The CPU is set to PBO 90 level 3, maxing out at 5.3 GHz all-core, while the GPU runs at stock settings around 2700-2755 MHz with water cooling.

Initial Configuration: Updraft

• 💨 The first configuration tested is an "updraft" setup: three intake fans on the bottom, three exhaust fans on the top, and a rear intake fan.
• 🌡️ This setup aims to push air up through the radiators, with the rear fan introducing cooler air to offset the warm air from the bottom radiator.
• 📊 Initial testing showed this configuration leading to warmer temperatures by the end of the 20-minute GPU test, reaching around 57.5°C.

Second Configuration: Open Side Panel

• 🔓 The second test involved removing the side panel to see how it affected temperatures, particularly the bottom radiator's airflow.
• 📈 Surprisingly, this configuration yielded the best results, dropping temperatures to around 51.5-52°C, suggesting the bottom fans were pushing air out effectively, allowing the top radiator to receive fresher air.
• ⚠️ The visual smoke test initially suggested the top radiator might be starved for air, but the actual temperature data contradicted this observation.

Third Configuration: All Intake with Rear Exhaust

• 🚀 The third setup featured all fans as intakes (top and bottom) with the rear fan acting as an exhaust.
• 📊 This configuration resulted in temperatures around 53°C, a slight improvement over the initial updraft but not as good as the open side panel.
• ⚙️ It's noted that the rear exhaust fan was fixed at 65% speed, and increasing its speed could potentially improve this configuration's performance.

Frequency and Heat Dissipation Analysis

• 📉 While temperature differences were noticeable (up to 5-7°C), the impact on GPU clock frequencies was minimal on a full-scale chart, though zoomed-in views showed lower valleys for the all-intake configuration.
• 🧠 A theory is proposed that the GPU's backplate absorbs significant heat, and the updraft with rear intake configuration might be more effective at dissipating this heat with cooler air directed across it.
• 💡 The potential for warm air from the top radiator to negatively impact VRMs, RAM, and other components is also discussed.

Future Optimizations and Conclusion

• 🛠️ The presenter plans to revert to an updraft with rear intake configuration, potentially increasing the rear fan speed and considering a larger fan (QX140) for improved airflow.
• 🤔 The traditional intake and exhaust layout seems to make the most sense, provided sufficient cool air can reach the top radiator.
• ⚠️ The ease of swapping Corsair Link fans is highlighted, despite some criticisms regarding the iCUE software and RGB control.