When choosing a power supply for a laptop with 65W instead of 90W, it's important to ensure that the voltage and polarity of the new power supply match the requirements of the laptop. Additionally, the new power supply should have a compatible connector to the laptop's power input. It's also important to consider the charging time and performance of the laptop with the lower wattage power supply. It's recommended to consult the laptop's manufacturer or a certified technician to ensure compatibility and safety. **

For two 5V 90W LED strips, you would need a power supply that can provide a total of 180W (90W per strip). Since the LED strips operate at 5V, you would need a power supply that can deliver at least 36A (180W / 5V = 36A). It is important to choose a power supply that can handle the total power requirements of both LED strips to ensure they operate properly and safely. **

An AC power adapter is designed to convert alternating current (AC) from a wall outlet to direct current (DC) to power a laptop. On the other hand, an AC/DC power adapter can convert both AC and DC power sources to the appropriate voltage needed for the laptop. AC/DC power adapters are more versatile as they can be used with different power sources, while AC power adapters are limited to converting AC power only. **

For two 5V 90W LED strips, you will need a power supply that can provide at least 180W of power in total. Make sure the power supply is rated for 5V output to match the LED strips' voltage requirement. Additionally, ensure that the power supply has enough current capacity to handle the combined load of both LED strips, typically around 36A (180W / 5V = 36A). It is recommended to use a power supply with a slightly higher wattage rating to ensure stable and reliable performance. **

To power a PC using an old Dell power supply, you will need to first determine if the power supply has the necessary connectors for your PC components. You may need to purchase adapters or connectors to make the necessary connections. Make sure to check the wattage of the Dell power supply to ensure it can provide enough power for your PC components. Additionally, be cautious when working with electronics and ensure all connections are secure before powering on the PC. **

An AC power supply is a type of electrical power supply that delivers alternating current, which periodically reverses direction. This type of power supply is commonly used in household electrical outlets and is the standard form of power transmission for most electrical grids. On the other hand, a DC power supply delivers direct current, which flows in only one direction. DC power supplies are commonly used in electronic devices such as computers, cell phones, and battery-operated devices. Both AC and DC power supplies are essential for providing the electrical energy needed to power various devices and systems. **

A suitable power supply for a Dell motherboard would depend on the specific model of the motherboard and the components connected to it. Generally, Dell motherboards are compatible with standard ATX power supplies. It is important to ensure that the power supply has the correct wattage to support the components connected to the motherboard. Additionally, checking for any specific power supply requirements or recommendations from Dell for the specific motherboard model is advisable to ensure compatibility and optimal performance. **

The power supply needed for a Dell PC will depend on the specific model and configuration of the PC. To determine the appropriate power supply, you can check the specifications of your Dell PC or refer to the user manual. Additionally, you can use Dell's online support resources or contact their customer service for assistance in determining the correct power supply for your specific Dell PC model. It's important to ensure that the power supply meets the requirements of your PC's components to ensure proper functionality and performance. **