![]() ![]() We use this information to address the inquiry and respond to the question. To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including: Questions and Inquiriesįor inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. Please note that other Pearson websites and online products and services have their own separate privacy policies. This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Pearson IT Certification products and services that can be purchased through this site. Figure 4.21 also shows the +5vsb connection to provide standby power for features such as Wake on LAN or Wake on Ring (covered later in this chapter). Once a power good signal is sent, the CPU begins executing software from the BIOS. If the power good signal is not sent from the power supply, a timer chip on the motherboard resets the CPU. If the power is okay, a power good signal is sent to the motherboard. The voltage levels must be correct before any other devices are tested and allowed to initialize. When the computer is turned on, part of POST is to allow the power supply to run a test on each of the voltage levels. Also, notice that a power good signal (labeled PWR_OK in Figure 4.21) goes to the motherboard. This is a much better design than older power supplies, where two connectors were used and could be reversed. Notice in Figure 4.21 that the power cable is only one connector, notched so the cable inserts into the connector one way only. The site provides information regarding power supply form factors.įigure 4.21 illustrates the compatibility between the ATX 20- and 24-pin motherboard connector standards. You can purchase a 24-pin to 20-pin power adapter. TECH TIP: Not all 24-pin motherboard connectors accept 20-pin power supply connectors ![]() Figure 4.20 shows more ATX power supply connectors. Sometimes labeled as AUX or 12V connects to the motherboard for CPUįigure 4.19 shows a few ATX power supply connectors. Sometimes labeled as AUX connects to the motherboard if it has a connectorĬonnects to peripheral devices such as hard drives and CD/DVD drivesĬonnects to peripheral devices such as the floppy drive PCIe video connects to PCIe video adapter ![]() Note that some connectors are 6+2-pin meaning they accept either the 6- or 8-pin cable. PCIe video connects to a PCIe video adapter. Main ATX power connector to the motherboardġ2V for CPU used with an ATX12V v1 power supply Table 4.2 lists the possible ATX power supply connectors. ![]() Some 24-pin motherboard connectors accept the 20-pin power supply connector. In addition, version 2 power supplies have a SATA power connector. This did away with the need for the extra 6-pin auxiliary connector. The ATX12V version 2 standard has a 24-pin motherboard connector instead of a 20-pin version 1 connector. For optimum performance, research what connectors and form factors are supported by both components. The motherboard form factor and the power supply form factor must fit in the case and work together. TECH TIP: The motherboard and power supply must be compatible ![]()
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