Category: PSU

COOLERMASTER RS-460-PMSR-A3 PC POWER SUPPLY

The CoolerMaster RS-460-PMSR-A3 power supply is a basic low cost generic 400W ATX PSU, Its sold mostly into the repair and maintenance market. To make things worse for reviewers, there are four kinds of power supplies on the new eXtreme Power Plus series: the ones using an 80 mm fan on the rear of the …

Continue reading

ALLIED AL-D500EXP 500W PC POWER SUPPLY

The Allied AL-D500EXP power supply is an ATX 2.0 power supply intended for the repair market for ATX class machines. This PSU is usually bundled with a low-end chassis. The PSU cannot come close to the claimed 500W power without failure. This suggests the brand is counterfeit. Allied is one of a number of different …

Continue reading

LEADMAN 8867 250W ATX POWER SUPPLY

The Leadman 8867 250W power supply is a basic ATX model sold mostly to OEM system builders. The ATX 1.03 design is best suited to Socket 7 and Slot 1 class machines. FEATURES 80 or 120 mm Fan Cooler and quieter operation Sleeved cables One (1) 16-inch 20+4-pin ATX power connector One (1) 16-inch 4/8-pin …

Continue reading

LEADMAN 8867 350W ATX POWER SUPPLY

The Leadman 8867 350W ATX power supply is a basic low cost model aimed at the OEM market. Leadman is a relatively unknown brand outside Asia. This PSU is pretty basic ATX 1.03 compliant for Pentium and Pentium II machines. FEATURES 80 or 120 mm Fan Cooler and quieter operation Sleeved cables One (1) 16-inch …

Continue reading

THE ATX PC POWER SUPPLY

ax1500i

All too often the PC power supply is neglected. Remember the whole machine is dependent on the power supply. For that reason it’s foolish to buy a crappy power supply. We spent a lot of money on power supplies until we finally bought the Corsair TX850V2 which has delivered a level of quality far beyond …

Continue reading

NOTEBOOK POWER SUPPLIES

Notebook computers have been around since the 1980s and they have grown in popularity as prices fell. The problem with notebook computers is the power supply. The same problem exists for many other consumer electronics. See the EPA Energy Star. A good example is the Toshiba A70 desktop replacement laptop computer. The machine uses 19V …

Continue reading

STANDBY POWER CONSUMPTION

power-plant

One of the hidden costs in modern life is the growth in small wall mounted power supplies to power everything from telephones to answering machines. Everybody has boxes of old power adapters too, they have tended to accumulate over time. What is not realized is that most of these cheap adapters is they trend to …

Continue reading

EPA ENERGY STAR 5 POWER SAVINGS

As the number of personal computers grew in the early 1980s the EPA stepped in with some initiatives to help reduce the need for additional expensive power plants. Acid rain was the main motivator as coal was still the primary source of power in the late 1970s. Originally in the 1980s the CRT VGA monitor …

Continue reading

INSIDE THE POWER SUPPLY

power mosfet

The power supply in the PC has evolved over time however the basic technology has remained the same. Most of the changes over the years were driven by many different forces. BRIDGE RECTIFIER It takes 4 power diodes to covert the 115V AC to about 150VDC.  The reason the voltage is higher is that DC …

Continue reading