4 336521
4.5 Output Protection ................................................................................ 42
4.5.1 Over Voltage Protection (OVP) – REQUIRED ............................... 42
4.5.2 Short Circuit Protection (SCP) – REQUIRED ................................ 43
4.5.3 No-Load Situation – REQUIRED ................................................ 43
4.5.4 Over Current Protection (OCP) – REQUIRED ............................... 43
4.5.5 Over Temperature Protection (OTP) – REQUIRED ........................ 43
4.5.6 Output Bypass – REQUIRED ..................................................... 43
4.5.7 Separate Current Limit for 12V2 - OPTIONAL .............................. 43
4.5.8 Overall Power Supply Efficiency Levels ...................................... 44
4.5.9 Power Supply Efficiency for Energy Regulations - ENERGY STAR* and
CEC (California Energy Commission) PC Computers with High
Expandability Score - RECOMMENDED ....................................... 45
5 Mechanical .................................................................................................... 47
5.1 Labeling and Marking - RECOMMENDED .................................................. 47
5.2 Connectors - REQUIRED ....................................................................... 48
5.2.1 AC Connector ........................................................................ 48
5.2.2 DC Connectors ....................................................................... 48
5.2.2.1 Main Power Connector – REQUIRED ............................ 49
5.2.2.2 Peripheral Connectors .............................................. 49
5.2.2.3 Floppy Drive Connector – Do Not Include (For Historical
Reference Only)....................................................... 50
5.2.2.4 PCI-Express* (PCIe*) Add-in Card Connectors
(Recommended) ...................................................... 50
5.2.2.5 +12 V Power Connector ............................................ 55
5.2.2.6 Serial ATA* Connectors – REQUIRED .......................... 56
5.3 Airflow and Fans - RECOMMENDED ........................................................ 57
5.3.1 Fan Location and Direction ....................................................... 57
5.3.2 Fan Size and Speed ................................................................ 57
5.3.3 Venting ................................................................................. 58
6 Acoustics ...................................................................................................... 59
6.1 Acoustics – RECOMMENDED .................................................................. 59
7 Environmental ............................................................................................... 60
7.1 Temperature – RECOMMENDED ............................................................. 60
7.2 Thermal Shock (Shipping) - RECOMMENDED ........................................... 60
7.3 Humidity – RECOMMENDED .................................................................. 60
7.4 Altitude – RECOMMENDED .................................................................... 60
7.5 Mechanical Shock – RECOMMENDED ...................................................... 60
7.6 Random Vibration – RECOMMENDED ...................................................... 61
8 Electromagnetic Compatibility .......................................................................... 62
8.1 Emissions – REQUIRED ........................................................................ 62
8.2 Immunity - REQUIRED ......................................................................... 62
8.3 Input Line Current Harmonic Content - OPTIONAL .................................... 62
8.4 Magnetic Leakage Field - REQUIRED....................................................... 62
8.5 Voltage Fluctuations and Flicker – REQUIRED .......................................... 63
9 Safety .......................................................................................................... 64
9.1 North America – REQUIRED .................................................................. 64
9.2 International – REQUIRED .................................................................... 64
9.3 Proscribed Materials - REQUIRED ........................................................... 65
9.4 Catastrophic Failure Protection - RECOMMENDED ..................................... 65
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