Free image compression
Free image watermark
Free image edit
Free QR code
Free Image Format ConversionFinding a computer that's perfectly suited to your gaming needs can be tough, which is why many serious gamers prefer to build their own systems. One of the most difficult and frustrating parts of building a system is connecting all of the cables, and getting them right. When you're hooking up your cooling fans, you'll see a number of different headers, like CPU OPT and CPU FAN.
Continue reading the article to learn more about these headers and the difference between CPU OPT and CPU FAN.
What is CPU OPT?
CPU OPT is a 4-pin connector found on some systems used for auxiliary connections to the cooling system. As the name suggests, this is an optional port used for larger PC coolers or to connect an AIO cooling pump. Unlike the CPU FAN header, it doesn't have integrated safety features, so it won't prevent your system from booting if not in use. Your system will function normally even if the CPU OPT header is empty. If your system overheats, it will issue a warning about the high temperature.
What is a CPU fan?
The CPU FAN is the main fan header on the motherboard used for cooling the system. The motherboard, BIOS, and various software such as SpeedFan, HWMonitor, etc., use this fan header to control the temperature of the CPU. It has built-in safety mechanisms to prevent damage to the system. The system will not start if no fan is connected to the CPU FAN header. Likewise, if the CPU FAN connection is interrupted while the system is running, it will safely shut down.
The difference between CPU OPT and CPU FAN
CPU OPT and CPU FAN are both fan headers on a motherboard used to connect cooling fans to the system. Here are some key differences between CPU OPT and CPU FAN: 1. **Purpose:** - **CPU FAN:** This header is specifically designated for the primary CPU cooler fan, which is responsible for directly cooling the central processing unit (CPU). It is essential to ensure that the CPU stays within safe temperature limits. - **CPU OPT (Optional CPU Fan):** This header is optional and designed for an additional or secondary CPU fan. It provides extra cooling for the CPU or the surrounding area in the computer case. It can be used for a supplementary cooler or a liquid cooling pump. 2. **Speed Control:** - **CPU FAN:** The motherboard typically controls the speed of the fan connected to this header based on the temperature of the CPU, providing automatic speed regulation. - **CPU OPT:** The motherboard may or may not have control over the speed of the fan connected to this header. Depending on the motherboard's BIOS settings, it could be set to either control the fan speed or operate at a fixed speed. 3. **Priority:** - **CPU FAN:** In case of a failure, the motherboard will prioritize the CPU FAN header, as the CPU's temperature is critical for system stability. - **CPU OPT:** If the CPU OPT fan fails, the motherboard might not trigger an immediate warning, as it's not as crucial as the primary CPU FAN. 4. **Wattage and Current:** - Both headers usually have similar specifications in terms of power delivery, allowing them to support fans with similar wattage and current requirements. 5. **Usage:** - **CPU FAN:** Mandatory for any system with a CPU cooler. - **CPU OPT:** Optional and useful for high-performance systems or overclocked CPUs where additional cooling is beneficial. Remember that these designations may vary depending on the motherboard manufacturer and model, so always consult your motherboard's manual for specific details.
| CPU OPT | CPU FAN |
|---|---|
| CPU OPT is a 4-pin connector used for secondary fan connections for cooling. | CPU FAN is the primary fan connection, directly linked to the BIOS. |
| It does not affect system booting. | It directly impacts system booting. The fan must be connected, or the system will not start. |
| The purpose of CPU OPT is to power additional cooling systems related to the CPU cooler. | Its main purpose is to power the CPU cooler. |
| With CPU OPT, you can use a splitter to distribute power to multiple devices. | You cannot use a splitter to direct power elsewhere. |
Frequently Asked Questions
If you still have questions about CPU OPT and CPU FAN, we've answered some common ones below.
1. Is CPU OPT required?
No, it is not necessary to connect a fan to the CPU OPT. The "OPT" in CPU OPT stands for optional, which means that unlike the CPU FAN header, your system can function properly even without a fan connected to the CPU OPT header.
2. Can I plug my pump into the CPU OPT socket?
Yes, you can connect an AIO pump to the CPU OPT header, but it's not recommended. The CPU OPT header on the motherboard is a dedicated interface designed to ensure cooling for the CPU. As such, it's best to connect fans to this header. If you connect your AIO cooler to the CPU OPT, make sure the cooler's fans are connected to the CPU FAN header.
3. Can I use the CPU OPT connector for a case fan?
If the CPU OPT connector is a 4-pin fan header and your motherboard has the ability to control fan speed through the BIOS and operating system, you can connect your case fan to the CPU OPT. When connected to the CPU OPT, the case fan will increase its speed significantly if the CPU temperature rises.
4. Can I run my CPU fan at full speed?
While it is safe to run your CPU fan at full speed, this will cause it to wear out more quickly. It is therefore recommended that you allow the system to control the fan speed based on its specifications.