Most HP CPU fan motors are not the same size. Different HP models use different fan sizes, so always check your laptop or desktop model before buying. Using the wrong size can cause overheating or fitting issues.
In this guide, we will help you understand what size you need.
Understanding HP Cooling System Design
HP cooling system design focuses on efficient heat management for high-performance computing. Key features include:
- Direct Liquid Cooling (DLC):
Utilizes water to absorb heat directly from components, reducing reliance on air conditioning and enhancing energy efficiency. - Fanless Architecture:
Fanless design is employed in specific systems, decreasing noise and improving reliability. - Modular Cooling Systems:
Offers scalable solutions, such as the HP Modular Cooling System (MCS) for high-density racks, which effectively manages heat in data centers. - Inkjet Microfluidic Cooling:
Innovates with inkjet technology to spray coolant onto chips, enhancing cooling efficiency.
These designs aim to optimize performance, reduce energy consumption, and ensure system longevity.
Why Do HP CPU Fan Sizes Differ?
Here is a general overview of common fan sizes found in HP laptops:
| Fan Size (mm) | Common Use | Description |
| 40mm | Compact Laptops, Small Form Factor PCs | Small fans for space-constrained systems, generally quieter but less efficient in cooling. |
| 50mm | Entry-Level Desktops, Budget Laptops | Slightly larger than 40mm, offering improved cooling for basic systems. |
| 60mm | Mid-Range Laptops, Workstations, Mid-Tier PCs | Offers better airflow and cooling, found in systems with moderate performance needs. |
| 80mm | High-Performance Laptops, Standard Desktops | Provides good airflow for cooling, used in gaming PCs or mid-range systems. |
| 92mm | Gaming Desktops, Performance Laptops | Larger fan for efficient cooling of high-performance CPUs and GPUs. |
| 120mm | High-End Desktops, Workstations | Large fan for superior cooling performance, found in high-end and custom-built systems. |
| 140mm | Custom Builds, Extreme Cooling Systems | Even larger for extreme cooling needs, used in overclocked or high-performance systems. |
This table covers the most common fan sizes used in HP systems, with larger fans providing better airflow and cooling capacity.
Differences Between Laptops and Desktops:
Laptops and desktops have different cooling systems due to their form factor, power, and thermal challenges:
| Aspect | Laptops | Desktops |
|---|---|---|
| CPU Fan Motor Size | Typically small and compact | Larger and more varied depending on case and CPU type |
| Standardization in HP Devices | Less standardized; varies greatly by model | More standardized, especially in tower PCs |
| Cooling Requirements | Lower, due to lower power CPUs | Higher, requiring larger or more powerful fans |
| Interchangeability | Rarely interchangeable between models | Some interchangeability among similar models |
| Space Constraints | Very limited, impacting fan size | More space allows for larger or aftermarket coolers |
| Performance Focus | Prioritizes quiet and efficient cooling in tight space | Focuses on performance, often with active cooling |
Most HP CPU fan motors are not the same size, especially when comparing laptops vs. desktops. Laptops use smaller, model-specific fans, while desktops offer more flexibility and standardization.
Cooling Needs of Different Processors:
Processors vary in terms of heat generation depending on their architecture and performance level:
- Low-power CPUs produce less heat, so that they can operate with smaller fans or passive cooling solutions.
- High-performance CPUs (in gaming PCs, workstations, or servers) generate more heat and require more advanced cooling systems, such as larger fans, heat sinks, or liquid cooling, to prevent overheating and maintain efficiency.
- Multi-core processors also need better cooling as the heat generated increases with the number of cores and processing power, especially under load.
Compact vs. Full-Size Systems:
| Aspect | Compact Systems (Mini PCs, Laptops) | Full-Size Systems (Tower Desktops) |
|---|---|---|
| CPU Fan Motor Size | Smaller, tightly integrated | Larger, more robust fans available |
| Fan Standardization (HP) | Varies widely; often unique to each model | More standardized across models |
| Cooling Efficiency | Limited by space and airflow | Better airflow, more cooling options |
| Upgradability | Very limited; fan replacement can be difficult | Easier to upgrade or replace CPU fans |
| Design Priority | Space-saving and portability | Performance and thermal efficiency |
| Heat Management | Uses compact heat pipes and small fans | Uses heatsinks, larger fans, and liquid cooling (optional) |
The cooling system design varies based on factors like the type of system (laptop vs. desktop), the device’s size, and the CPU’s heat. Larger, more powerful processors typically require more advanced cooling solutions, while compact systems rely on smaller, less efficient systems to manage heat.
How to Find the Right Fan Size for Your HP Model?
Finding the correct fan size for your HP model ensures optimal cooling and system performance. Here is how you can determine the correct size:
Check Model Number (Step-by-Step):
Locate the Model Number: Look for the model number on your HP device. It is usually found on the bottom of the laptop or the side of a desktop or workstation.
- For laptops: It may be on the bottom panel or inside the battery compartment.
- For desktops: It’s often located on the back or side of the tower.
Search the Model Number Online: Go to HP official website or use a search engine to find the specific details about your model.
- Example: Search for “HP Pavilion 15 fan size” or “HP EliteDesk 800 fan specifications.”
Compare Dimensions: Once you have the model information, look up the cooling specifications, including the fan size that is compatible with your device.
Look Up Part Number or Service Manual:
Identify the Part Number: If your fan needs to be replaced or you want a compatible fan, locate the part number for your existing fan. You can often find this printed on the fan or the system’s documentation.
Access the Service Manual: Go to HP official support website. Enter your model number and find the service manual or user guide.
- HP Support page: support.hp.com
Find Fan Specifications: The service manual usually includes part numbers, specifications, and sizes for all internal components, including the cooling fan.
Use Tools Like HP Support Assistant or Official Website:
HP Support Assistant:
- Install the Tool:
If not installed, download HP Support Assistant from HP official site. - Check System Information:
Open the app, go to the “My Devices” tab, and select your model. It will provide detailed hardware information, including compatible components like the cooling fan.
HP Official Website:
- Visit the HP Support Website.
- Enter your model number to find detailed specifications and replacement parts.
- Under the “Parts & Accessories” section, you can often find the fan size and compatibility information.
By checking the model number, using the service manual, and utilizing HP Support tools, you can quickly find the right fan size for your HP device. This ensures proper airflow and cooling, contributing to system stability and performance.
What Happens If You Use the Wrong Fan Size?
Installing the wrong fan size can lead to serious issues that affect your HP system’s reliability, safety, and performance.
Overheating:
- A smaller or incompatible fan may not move enough air to cool the processor or internal components effectively.
- Overheating can cause thermal throttling, where the CPU slows down to reduce heat, or lead to unexpected shutdowns and long-term damage to the motherboard or GPU.
Improper Fit:
- A fan that’s too large or has the wrong mounting holes won’t fit properly in the chassis.
- This can cause vibration, physical strain on components, or even prevent the case from closing correctly, potentially damaging internal parts or reducing airflow.
System Performance Issues:
- Inadequate cooling results in reduced system performance due to heat buildup.
- The system may lag, crash under load, or operate with loud fan noise as it tries to compensate.
- Long-term exposure to high temperatures can shorten the lifespan of your CPU, GPU, and other critical components.
Using the correct fan size is essential for keeping your HP device cool, quiet, and running at peak performance. Always match the fan to your model’s exact specs to avoid heat damage and system failure.
Tips Before Buying a Replacement Fan!
Replacing a fan in your HP device? Make sure you are getting the right part that fits, cools well, and lasts. Here is what to know before you click “Buy”.
OEM vs. Third-Party Options:
- OEM (Original Equipment Manufacturer):
These are official HP fans made for your exact model. They cost more but guarantee a perfect fit, proper airflow, and full compatibility.
- Third-Party Fans:
- Commonly more affordable and easier to find, though the quality may differ significantly. Some are just as good, others may be louder, wear out faster, or fit poorly.
✅ Tip: If your system is still under warranty or used in a business-critical setup, always go OEM. For older models, high-rated third-party fans can be a smart budget pick, just double-check specs and reviews.
Where to Buy Genuine Parts?
- HP Official Parts Store (parts.hp.com): Best source for authentic parts and model-specific guidance.
- Authorized HP Partners: Sites like CDW, Insight, or Newegg often carry certified HP components.
- Avoid risky marketplaces: Be cautious on eBay or low-rated Amazon sellers; fake or mismatched fans are common.
✅ Tip: Always match the fan’s part number and connector type (3-pin, 4-pin, etc.) to avoid compatibility issues.
Warranty Check and Return Policies?
- Check if your fan or device is still under HP warranty. If it is, contact HP first, they may replace the fan for free.
- When buying from a third party, read the return policy carefully. Some sellers charge restocking fees or don’t accept returns if the packaging is opened.
- Look for at least 30-day returns and seller guarantees for peace of mind.
✅ Tip: Keep your purchase receipt and original packaging until the new fan works as expected.
Extra Advice!
Don’t rush. A few extra minutes spent checking part numbers, reading reviews, and buying from a trusted source can save you from system damage, wasted money, or return hassles.
Conclusion:
Choosing the right HP CPU fan size is crucial for maintaining system performance and preventing overheating. Always check your device’s model number, use official resources, and consider OEM parts for best compatibility. A properly sized fan ensures optimal cooling, quieter operation, and a longer hardware lifespan.
FAQs
1. Can I upgrade my HP fan motor to a larger size for better cooling?
Ans: No, you typically cannot upgrade to a larger fan motor unless the chassis and motherboard layout support it. HP systems are designed with specific airflow and space constraints, so installing a larger fan could interfere with other components or not fit at all.
2. Are HP fan motors standardized across product lines like Pavilion or EliteBook?
Ans: No, even within the same product line, HP fan motors can vary in size and design due to differences in thermal requirements, form factors, and internal layouts between models and generations.
3. Do HP fan motors have different connector types?
Ans: Yes, HP fans can use different connectors, such as 3-pin or 4-pin headers. It’s essential to match the fan’s connector type with your motherboard to ensure proper power delivery and speed control.
4. Is fan motor size the same as fan blade size in HP systems?
Ans: Not precisely. Fan motor size refers to the core component driving the blades, while fan blade size impacts airflow. Two fans with the same motor size may have different cooling performance due to blade design and RPM capabilities.
5. How can I tell if a fan motor is failing, regardless of size?
Ans: Signs of fan motor failure include loud noises, inconsistent spinning, overheating warnings, or the fan not spinning at all. Use HP diagnostics or third-party tools to check fan RPM and temperature trends.
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