tailieunhanh - CompTIA A+ Complete Study Guide phần 3

bộ nhớ cache L1 và nói chung là nhỏ hơn so với bộ nhớ cache L2, mà nằm trên bo mạch chủ. Khi CPU yêu cầu thông tin bên ngoài, nó tin rằng nó yêu cầu thông tin từ RAM. Bộ điều khiển bộ nhớ cache, tuy nhiên, chặn yêu cầu và tư vấn RAM thẻ của mình để khám phá ra nếu | Performing Preventative Maintenance on Personal Computers 129 air from time to time can prevent damage to the components. While you re cleaning the components be sure to clean any cooling fans in the power supply or on the heat sink. To clean the power supply fan blow the air from the inside of the case. When you do this the fan will blow the contaminants out the cooling vents. If you spray from the vents toward the inside of the box you ll be blowing the dust and grime inside the case or back into the fan motor. One way to ensure that the environment has the least possible effect on your computer is to always leave the blanks in the empty slots on the back of your box. These pieces of metal are designed to keep dirt dust and other foreign matter from the inside of the computer. They also maintain proper airflow within the case to ensure that the computer doesn t overheat. Performing Preventative Maintenance on Personal Computers This section outlines some preventative maintenance products and procedures. Preventative maintenance is one of the most overlooked ways to reduce the cost of ownership in any environment. Cleaning a computer system is the most important part of maintaining it. Computer components get dirty. Dirt reduces their operating efficiency and ultimately their life. Cleaning them is definitely important. But cleaning them with the right cleaning compounds is equally important. Using the wrong compounds can leave residue behind that is more harmful than the dirt you re trying to remove Most computer cases and monitor cases can be cleaned using mild soap and water on a clean lint-free cloth. Make sure the power is off before you put anything wet near a computer. Dampen don t soak a cloth with a mild soap solution and wipe the dirt and dust from the case. Then wipe the moisture from the case with a dry lint-free cloth. Anything with a plastic or metal case can be cleaned in this manner. Don t drip liquid into any vent holes on equipment. CRTs in .

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