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 aliases under the umbrella of another company: Deer Computer Co. Ltd. Along with L&C Power and most recently Solytech, Deer has been in the computer SMPS business for years now.

The cables are not bundled with anything more than a few zip ties which is common with low end power supplies. There is the 2×12 and ATX12V power cables and one strand of Molex with a Berg connector for a floppy drive.

There are 2 PCI Express 6-pin power cables. There are also 2 SATA power connectors.

The IEC power connector is standard with a switch to select 120 or 240V service. The rocker switch is also standard for ATX power supplies.

AL-D500EXP only has a 80mm fan to remove excess heat,. We would expect a 120mm fan considering the claimed rating is 500W and the relative efficiency is under 70%

The metal box is standard for power supplies to reduce RF noise. The label has the usual warnings. The sheet metal construction is generally universal.

Allied AL-D500EXP ATX Power Supply
AC Input Rating DC Output Rating
AC Input: 100V – 240V DC Output +3.3V +5V +12V1 +12V2 -12V +5Vsb
Current: 8A Max Load 24A 24A 18A 18A 0.5A 3.0A
Frequency: 50Hz – 60Hz Maximum Combined Wattage 180W 216W 216W
Total Power: 500W

Load testing this PSU showed it to heat up very rapidly suggesting it cannot even come close to the rated 18A on the 12V lines. Load testing caused the PSU to fail at only 12A which is well below the ratings on the label. There is no overload protection, the PSU failed under test.

Loading the PCI Express was a mistake with a video card. The PSU failed immediately. The smell was unmistakable., the PSU was trash.

We estimate that 250W is about the maximum load this PSU can tolerate before it fails.This cheap PSU has so many corners cut. Safer would have been a simpler single 12V setup which would reduce the cost.

Clearly this power supply is not nearly capable of 500W and its likely a 250W model that has been counterfeited with a higher rated label.

No surprise to read posts of machines destroyed with crap power supplies like the AL-D500EXP. Deer power supplies have a reputation of frying every component.