Computer power supplies are rated based on their maximum output power. Typical power ranges are from 500W to lower than 300 W for small form factor systems intended as ordinary home computers, the use of which is limited to Internet-surfing and burning and playing DVDs. Power supplies used by gamers and enthusiasts mostly range from 450W to 1400W. Typical gaming PCs feature power supplies in the range of 500-800W, with higher-end PCs demanding 800-1400W supplies. The highest-end units are up to 2 kW strong and are intended mainly for servers and, to a lesser degree, extreme performance computers with multiple processors, several hard disks and multiple graphics cards. The power rating of a PC power supply is not officially certified and is self-claimed by each manufacturer. A common way to reach the power figure for PC PSUs is by adding the power available on each rail, which will not give a true power figure. Therefore it is possible to overload a PSU on one rail without having to use the maximum rated power.
Sometimes manufacturers inflate their power ratings, in order to gain an advantage in the market. This can be done due to a lack of clear standards regarding power supply labeling and testing.
Connectors
Various connectors from a computer PSU.
Typically, power supplies have the following connectors:
* PC Main power connector (usually called P1): Is the connector that goes to the motherboard to provide it with power. The connector has 20 or 24 pins. One of the pins belongs to the PS-ON wire (it is usually green). This connector is the largest of all the connectors. In older AT power supplies, this connector was split in two: P8 and P9. A power supply with a 24-pin connector can be used on a motherboard with a 20-pin connector. In cases where the motherboard has a 24-pin connector, some power supplies come with two connectors (one with 20-pin and other with 4-pin) which can be used together to form the 24-pin connector.
* ATX12V 4-pin power connector (also called the P4 power connector). A second connector that goes to the motherboard (in addition to the main 24-pin connector) to supply dedicated power for the processor. For high-end motherboards and processors, more power is required, therefore EPS12V has an 8 pin connector.
* 4-pin Peripheral power connectors (usually called Molex for its manufacturer): These are the other, smaller connectors that go to the various disk drives of the computer. Most of them have four wires: two black, one red, and one yellow. Unlike the standard mains electrical wire color-coding, each black wire is a ground, the red wire is +5 V, and the yellow wire is +12 V. In some cases these are also used to provide additional power to PCI cards such as FireWire 800 cards.
* 4-pin Berg power connectors (usually called Mini-connector or "mini-Molex"): This is one of the smallest connectors that supplies the floppy drive with power. In some cases, it can be used as an auxiliary connector for AGP video cards. Its cable configuration is similar to the Peripheral connector.
* Auxiliary power connectors: There are several types of auxiliary connectors designed to provide additional power if it is needed.
* Serial ATA power connectors: a 15-pin connector for components which use SATA power plugs. This connector supplies power at three different voltages: +3.3, +5, and +12 volts.
* 6-pin Most modern computer power supplies include 6-pin connectors which are generally used for PCI Express graphics cards, but a newly introduced 8-pin connector should be seen on the latest model power supplies. Each PCI Express 6-pin connector can output a maximum of 75 W.
* 6+2 pin For the purpose of backwards compatibility, some connectors designed for use with PCI Express graphics cards feature this kind of pin configuration. It allows either a 6-pin card or an 8-pin card to be connected by using two separate connection modules wired into the same sheath: one with 6 pins and another with 2 pins.
* A C14 IEC connector with an appropriate C13 cord is used to attach the power supply to the local power grid.
* PSU A has a peak rating of 550 watts at 25°C, with 25 amps (300 W) on the 12 volt line, and
* PSU B has a continuous rating of 450 watts at 40°C, with 33 amps (400 W) on the 12 volt line,
and those ratings are accurate, then PSU B would have to be considered a vastly superior unit, despite its lower overall power rating. PSU A may only be capable of delivering a fraction of its rated power under real world conditions.
Buyers,
refer here >>> ORDERING
The following desktop power supply units as photo taken from actual item, refurbish condition and all tested in good usage quality before sale, mail me (mikewilfrey@gmail.com)for more details at current unit price, price range around RM20.00 to RM85.00 (exclu.postage)
1)POWERLOGIC 450W WITH S-ATA POWER SUPPLY UNIT, 24+4 PINS ON MOTHERBOARD, FIVE (5) IDE PINS FOR DRIVE, ONE 4PINS FLOPPY, ONE S-ATA
2)FURTUNE ATX-P450W 450W POWER SUPPLY WITH S-ATA, 24+4 PINS ON MOTHERBOARD, FOUR (4) IDE PINS FOR DRIVE, ONE 4PINS FLOPPY, TWO (2) S-ATA
3)FURTUNE LC-B400ATX 400W POWER SUPPLY, 20+4 PINS ON MOTHERBOARD, FOUR (4) IDE PINS FOR DRIVE, ONE 4PINS FLOPPY
4)SWITCHING POWER SUPPLY 400W, 20+4 PINS ON MOTHERBOARD, FOUR (4) IDE PINS FOR DRIVE, ONE 4PINS FLOPPY, COME WITH GLOBE FAN SLEEVE BEARING
5)E-VIEW SWITCHING POWER SUPPLY ATX 480W, 20+4 PINS ON MOTHERBOARD, FOUR (4) IDE PINS FOR DRIVE, FOUR (4) IDE PINS FOR DRIVE, ONE 4PINS FLOPPY, ONE S-ATA
6)CoolerMaster eXtreme
RS-430-PMSR / RS-430-PMSP
(max:400w, peak:430w)
RS-430-PMSR
Connectors:
- One (1) 20+4-Pin, motherboard
- One (1) 4-Pin, P10
- Six (6) 4-Pin Molex, (Peripheral)
- One (1) 4-Pin Floppy
- Two (2) Sata Power
RS-430-PMSP
Connectors:
- One (1) 20Pin, motherboard
- One (1) 4-Pin, P10
- Six (6) 4-Pin Molex, (Peripheral)
- One (1) 4-Pin Floppy
- Two (2) Sata Power
7)CoolerMaster eXtreme
RS-430-PCAR (max:400w, peak:430w)
RS-430-PCAR
Connectors:
- One (1) 24-Pin, motherboard
- One (1) 4-Pin, CPU
- Six (6) 4-Pin Molex, (Peripheral)
- One (1) 4-Pin Floppy
- Two (2) Sata Power
Features: Super silent operation with intelligent fan speed control (20dBA). 120mm fan makes superb heat dissipation. OVP / OCP / OTP / Short circuit protection. 100% burn-in, hi-pot & ATE tested by manufacturer.
8)CoolerMaster eXtreme 460w
RS-460-PCAR-A3
RS-460-PCAR-A3
Connectors:
- One (1) 20+4-Pin
- Two (2) 4-Pin
- One (1) 6-Pin, (PCI-e power)
- Five (5) 4-Pin Molex, (Peripheral)
- One (1) 4-Pin Floppy
- Four (4) Sata Power
Features:
1. Compliance with the newest Intel standard ATX 12V V2.3
2. More than 70% efficiency at typical load operation
3. High reliability (MTBF > 100,000 hrs)
4. Green power design to meet Energy Star and Blue Angel requirements
5. Multiple protection design(OVP/OCP/OPP/SCP)
6. Support dual +12V1 and +12V2 outputs for higher power usage
9)CoolerMaster eXtreme 450w
RS-450-ACLX
RS-450-ACLX
Connectors:
- One (1) 24-Pin, motherboard
- One (1) 4-Pin
- One (1) 6-Pin, (PCI-e power)
- Seven (7) 4-Pin Molex, (Peripheral)
- Two (2) 4-Pin Floppy
- Two (2) Sata Power
- One (1) 4-Pin, Dispaly Interface connector
Features:
1. Fully supports the newest Intel standard ATX 12V Version 2.0
2. Super silent operation with intelligent fan speed control (< 20dBA)
3. Power consumption management by human computer interface
4. Support dual +12V1 and +12V2 outputs for higher power usage
5. Green power design to meet energy star and blue angle requirement
6. More 75% efficiency at typical load operation
Higher reliability (MTBF > 100,000 hours)
7. OVP / OCP / OTP / OLP / Short / Full protection
8. Real power capacity satisfy hi-end system operation
Note : We also have the following ATX DESKTOP POWER SUPPLY in various watt as 300w, 350w, 400w, 420w, 450w, 500w with different manufacturers, let me know if you prefer to get one or get more, buy more less more.
