Linus Tech Tips - Everyone is Cooling Their PC Wrong
The video explores the innovative idea of using a portable air conditioner to cool a fanless Radeon 7900 XTX graphics card, aiming to create a completely silent gaming PC. The process involves connecting the air conditioner to the PC using a shroud and pipe system to direct cool air onto the components. Initial tests show that while the setup isn't perfect, it significantly improves cooling compared to no ducting, maintaining higher clock speeds and lower temperatures. The team also modifies the air conditioner to run continuously by adjusting the thermistor, ensuring consistent cooling. Challenges such as condensation and airflow distribution are addressed, with suggestions for insulation and baffle adjustments to optimize performance. The concept demonstrates potential for home use, especially if the air conditioner is already part of the setup, offering both room and PC cooling benefits.
Key Points:
- Using a portable air conditioner can effectively cool a fanless GPU, reducing noise.
- Initial setup involves directing cool air using shrouds and pipes, improving component cooling.
- Modifying the air conditioner's thermistor allows continuous operation, enhancing cooling efficiency.
- Condensation and airflow distribution are challenges; insulation and baffles can help mitigate these issues.
- The setup offers dual benefits of cooling both the PC and the room, making it practical for home use.
Details:
1. 🔧 ASRock's Fanless Radeon 7900 XTX Experiment
- ASRock's Radeon 7900 XTX is engineered with a fanless design, aiming to explore the viability of passive cooling in high-performance GPUs.
- Within 30 seconds of operation, the GPU begins to thermal throttle, highlighting the limitations of a fanless setup in maintaining optimal performance.
- The experiment employs a DREO AC 516S air conditioner, with a 14,000 BTU capacity, to address these cooling challenges, demonstrating an innovative approach to external cooling solutions.
- This air conditioner is capable of cooling spaces up to 450 square feet, providing sufficient power to test its effectiveness on the fanless GPU.
- The experiment underscores the challenges and potential of fanless GPU designs, pushing the boundaries of traditional cooling methodologies.
2. 🛠️ Crafting a DIY Air Conditioning System
2.1. Design Considerations
2.2. Implementation Challenges
3. 🌬️ Initial Testing of the Cooling Setup
- The cooling setup features a manifold design with shrouds over critical components like the CPU to enhance cooling efficiency.
- During testing, the setup was operational but not optimized, indicating potential for further enhancement.
- The compressor, operating at a notably quiet 46 dB, cycles frequently due to thermal sensor feedback, which might restrict it from reaching full output capacity.
- Idle temperature measurements showed the CPU at 16°C and the GPU at 33°C, highlighting the system's cooling potential.
- Considering the use of window AC units as a cost-effective alternative to custom water blocks, though condensation remains a concern.
4. 🔄 Performance Tweaks and Observations
4.1. GPU Temperature and Performance
4.2. CPU Temperature Management
4.3. Cooling Enhancements and Overall Performance
5. 🔍 Enhancing Airflow with 3D Scanning
- 3D scanning was utilized to refine the AC unit's seal, significantly boosting efficiency by ensuring optimal airflow.
- Repositioning the thermistor prevented premature shutdowns of the compressor, facilitating continuous operation.
- The addition of shrouds effectively directed cold air to critical components, resolving distribution challenges.
- Concerns were noted about higher fin density on the GPU leading to increased back pressure, potentially reducing airflow compared to the CPU.
- The cooling system's capacity, rated at 14,000 BTUs or approximately 4,000 watts, indicates a risk of overcooling, necessitating careful management to avoid condensation.
- The setup allows for operation without AC, leveraging ambient temperature, while 'turbo mode' provides continuous cooling options.
- Insulated hoses were recommended to maintain airflow integrity, with a strategic focus on cooling the entire room rather than isolated components.
- Balanced airflow between CPU and GPU may require additional baffles to optimize distribution.
- Noise reduction and efficiency could be improved by placing the AC unit at a distance with insulated ducting.
6. 💧 Addressing Condensation Challenges
- The CPU runs at 17°C while the GPU reaches 90°C, requiring enhanced thermal management to balance temperatures effectively.
- Implement improvements in the baffle system to aid in better cooling efficiency, which can lower GPU temperatures from 90°C to 76°C.
- Plugging small system gaps enhances performance and cooling efficiency, crucial for maintaining optimal operating temperatures.
- The system expels cold air effectively, indicating a successful heat exchange that cools both the PC and the room.
- Optimize airflow by refining the baffle system or adopting a GPU with a more robust heat sink to enhance cooling focus.
- Achieving a GPU temperature reduction to 71°C suggests that airflow optimization and system insulation can prevent condensation effectively.
- Consider insulating lines and adding an accelerator fan to improve static pressure, thereby enhancing the overall system efficiency and reducing condensation risks.
7. 🏠 Exploring Home AC Cooling Feasibility
- Insulation is crucial to prevent condensation when cold surfaces meet warm air, particularly for ducting and 3D printed components.
- Implementing home AC for CPU cooling can achieve temperatures between 11 to 14°C during gaming sessions on a 12700K processor, indicating significant cooling efficiency.
- The feasibility of home AC cooling is practical if the unit is already available, making it a cost-effective solution using existing equipment.
- DREO AC units are noted for their performance, although they may not be intended for this specific use case.
- The company sponsored the video and highlighted their AC and a quiet, multi-directional oscillating room fan, though the focus remains on technical feasibility.
8. 🎥 Discover More Cooling Innovations
- The 'janky cooling playlist' offers a collection of unique cooling solutions, including DIY and experimental designs.
- Features a variety of unconventional methods, such as using household items for cooling, showcasing creativity and innovation.
- Practical demonstrations of cooling techniques that can be easily replicated at home.
- Highlights include using fans with ice or water for enhanced cooling effects, and constructing makeshift air conditioners from common materials.
- Includes metrics on effectiveness, such as temperature reduction rates and cost savings compared to traditional methods.