The 12V rails on a power supply are marked by a yellow wire. 12V (DC) has developed over the years into the most important supply voltage within a computer and delivers power primarily to the graphic card(s), processor and (optical) drives.
20/24 pin (ATX connector)
The 20/24 pin connector – also known as the ATX plug – is the biggest and also the most important plug for a power supply unit. It is connected to the mainboard and delivers not only the three primary power voltages (3.3V, 5V and 12V) but also the power-good signal required for operation as well as 5V stand-by and -12V. The 20/24 pin connector is thus a computer's primary power supply connection.
24/7 refers to hours of operation. It means that a computer (or other electronic device) can be operated 24 hours a day, 7 days a week without interruption.
4+4 pin (connector)
The 4+4 pin plug is also known as the 8-pin EPS connector. It contains eight cables, including four connected to the 12V rail. The other four cables connect the power supply to the earth. This plug delivers power to modern multi-core processors. The 4+4 pin is also informally known as the 8 pin connector or p8 plug.
The 4-pin Molex plug is primarily used to connect (optical) drives and hard drives, although it is being increasingly displaced by the S-ATA connector. The Molex, as it is known informally, has four cables. These comprise two earth wires (black) and one cable each for the 5V (red) and 12V (yellow) voltage.
80 Plus Standard / bronze / silver / gold
80 PLUS is a certification awarded for a power supply's efficiency level. The more efficient the power supply, the better the level of 80 Plus certificate. The efficiency levels are differentiated using the Olympic medal system, with bronze, silver and gold certificates. More information about 80 PLUS can be found on its homepage at: http://www.80plus.org
Electrical current is measured in ampere, which describes the movement of electrons in an electric circuit. The abbreviation for ampere is a capital A.
ATX 2.3 / ATX
ATX stands for "Advanced Technology Extended". This is a norm that defines certain standards for casings, power supplies and mainboards in a computer. The current version for ATX power supplies is ATX v2.3. The ATX specifications for power supplies can be referenced in the "Intel Power Supply Guide".
Auto Restart Function
The auto restart function refers to the ability for a fan to restart on its own without any damages following mechanical obstruction (such as being stopped by hand).
ATI, AMD Game Ready
AMD Game Ready is a standard for gaming computers. It was defined by hardware maker AMD to make it easier for computer gamers to purchase pre-assembled PC systems. The principle also applies to power supplies that meet the requirement of AMD Games Ready PCs.