EXTREME Overclocking - Power Supply Testing Methodology Article - Page: 6
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Power Supply Testing Methodology
at EXTREME Overclocking

Date Published: June 2, 2005
Page Last Updated: February 20, 2006
Author: Jason Rabel

 

Compiled Test Results - Connectors:

ATX12V v2.x calls for split 12V rails, with certain connectors on each rail. The proper connector assignment is as follows:

  • 12V1 - 24pin Main Power, SATA Power, 4pin Peripheral & Floppy Power
  • 12V2 - ATX +12V Power

The 6pin "PCI Express" connector is not part of the official ATX12V 2.x specs at this point in time. While we would like to see manufacturers follow the ATX12V guidelines, sometimes they go their own route to balance loads on the 12V rails. Obviously only power supplies with split 12V rails will be listed, v1.3 PSUs only have one 12V rail.

 ATX 2.x 12V Wiring
Akasa
PaxPower
Rated: 460W
PFC: Active
ATX: 2.0		 12V1 Main Power (24pin)
SATA Power
Peripherals (4pin & Floppy)
PCI Express (6pin)
12V2 ATX +12V (4pin)
EPS12V (8pin)
 
Akasa
PowerPlus
Rated: 650W
PFC: Active
ATX: 2.01
EPS: 2.11		 12V1 First 4-pins on the 8-pin EPS12V
12V2 Last 4-pins on the 8-pin EPS12V
SATA Power
12V3 Main Power (24pin)
PCI Express (6pin)
Super Micro AGP (4pin)
12V4 Peripherals (4pin & Floppy)
 
Antec
SP-500
Rated: 500W
PFC: None
ATX: 2.0		 12V1 Main Power (24pin)
SATA Power
Peripherals (4pin & Floppy)
PCI Express (6pin)
12V2 ATX +12V (4pin)
 
Antec
TP-II 480 Blue
Rated: 480W
PFC: None
ATX: 2.01		 12V1 Main Power (24pin)
SATA Power
Peripherals (4pin & Floppy)
PCI Express (6pin)
12V2 ATX +12V (4pin)
 
Cooler Master
RS-550-ACLY
Rated: 550W
PFC: Active
ATX: 2.01		 12V1
12V3		 Main Power (24pin)
SATA Power
PCI Express (6pin)
Peripherals (4pin & Floppy)
12V2 ATX +12V (4pin)
EPS Processor Power (8pin)
EPS Workstation (6pin)
 
Enermax
EG475P-VE
Rated: 470W
PFC: None
ATX: 2.0		 12V1 Peripherals (4pin & Floppy)
SATA Power
PCI Express (6pin)
12V2 Main Power (24pin)
ATX +12V (4pin)
 
Enermax
Liberty
Rated: 620W
PFC: Active
ATX: 2.2		 12V1 Main Power (24pin)
Peripherals (4pin & Floppy)
SATA Power
PCI Express (6pin)
12V2 8-pin EPS12V
(4+4 style to allow for ATX12V)
 
HEC
ACE Power 480UB
Rated: 480W
PFC: None
ATX: 2.01		 12V1 Main Power (24pin)
Peripherals (4pin & Floppy)
SATA Power
12V2 ATX +12V (4pin)
PCI Express (6pin)
 
Hiper
Type-R 580W
Rated: 580W
PFC: None
ATX: 2.2		 12V1 Main Power (24pin)
Peripherals (4pin & Floppy)
SATA Power
PCI Express (6pin)
12V2 ATX +12V (4pin)
 
Hiper
Type-R 480W
Rated: 480W
PFC: None
ATX: 2.2		 12V1 Main Power (24pin)
Peripherals (4pin & Floppy)
SATA Power
PCI Express (6pin)
12V2 ATX +12V (4pin)
 
Meridian
XClio-450BL
Rated: 450W
PFC: None
ATX: 2.0		 12V1 Main Power (24pin)
SATA Power
PCI Express (6pin)
Peripherals (4pin & Floppy)
12V2 ATX +12V (4pin)
 
Meridian
XCLIO-550BL
Rated: 550W
PFC: None
ATX: 2.01		 12V1 Main Power (24pin)
SATA Power
PCI Express (6pin)
Peripherals (4pin & Floppy)
12V2 ATX +12V (4pin)
EPS +12V (8pin)
 
Seasonic
S12-500W
Rated: 500W
PFC: Active
ATX: 2.0		 12V1 Main Power (24pin)
SATA Power
PCI Express (6pin)
Peripherals (4pin & Floppy)
12V2 ATX / EPS +12V (4pin / 8pin)
 
Sunbeamtech
NUUO-550W
Rated: 550W
PFC: None
ATX: 2.0		 12V1 Main Power (24pin)
SATA Power
PCI Express (6pin)
Peripherals (4pin & Floppy)
12V2 ATX / EPS +12V (4pin / 8pin)
 

 

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