Allied AL-D500EXP 500W Power Supply

Here at, we get requests to test different power supplies all the time. One of the more common requests is for us to take on certain units from names that have become the bane of the educated and uneducated alike. I speak of power supply makers so infamous for past shoddy products that the very mention of their name is accompanied by screams of terror and panic in the streets. Ok, maybe I’m exaggerating that a little.

PRODUCT: Allied AL-D500EXP 500W Power Supply
PROD LINK: Not Available
PRICE: $75.00
Price is at time of testing!

Today, however, we are going to be taking a look at one of these bargain power supplies. Will it survive the load tester and go on to earn a recommendation, or will it explode in multi-colored fireworks, perhaps earning a visit from the fire department. Dear readers, I give you the Allied AL-D500EXP.

Allied AL-D500EXP 500W

For those who don’t recognize the name, 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. Deer’s rise to infamy began in the latter part of the 20th century, when reports on internet message boards began to claim that the power supplies oft included with the more bargain basement cases were not only dying in spectacular fashion, they were taking connected components along for the ride. As the frequency of the reports increased, including one by yours truly back in the day, it was hoped that the offending power supplies would be improved. And in some cases, they were. Some companies that had used Deer as a source for their own units changed to better suppliers, while others preferred to think of the dollar signs involved with peddling junk and waiting for the chance to sell more junk to replace the dead.

But, as Father Time plodded relentlessly forward, few things seemed to change for Deer and the other companies under their control. The name Deer disappeared from many of their units, replaced by L&C Power and Allied. But, sadly, the internal circuitry did not seem to change much at all, at least in the el cheapo sector. On the lower end, where L&C Power units still dominate the bargain sector, the innards looked virtually identical to early models with high failure rates. The units being sold under the Allied name showed some signs of improvement, but it was feared by this reviewer that they had not improved enough.

And so we come to August 2007. I was offered the chance to review one of Allied’s latest and greatest, and I couldn’t pass up that opportunity. It has now been seven years since my own Deer unit met the trash can, and I finally get to see what’s changed. Now then, how’s about a label shot, and a nice chart?

Allied AL-D500EXP 500W

Allied AL-D500EXP 500W – DC Output
DC Output +3.3V +5V +12V1 +12V2 -12V -5V +5VSB
24A 24A 18A 18A 0.8A N/A 2A
Max Combined Watts 130W 9.6W N/A 10W
480W 216W 19.6W

Why yes, Allied apparently thinks we can pull 480W from the 3.3V, 5V, and 12V1 rails, and still have enough left for 216W on 12V2. My past experience with Deer makes me wonder if they aren’t overestimating this unit juuuuuust a little.

Allied AL-D500EXP 500W

The rear fan benefits from a wire grille on this unit, unlike cheaper offerings from L&C which still come with a punched grille. The presence of a voltage switch tells us that this unit either has passive PFC, or lacks it altogether. This power supply actually has two identical 80mm fans, one for intake and one for exhaust. So, it should have no trouble cooling itself when we ask it to put out 500 watts, right? Right? Anyone? Anyone? Bueller? Bueller? Let’s take a peek at the cabling.

Allied AL-D500EXP 500W – Cabling
Type of connector:
ATX connector (440mm) 20+4 pin
8-pin Xeon/EPS connector (450mm) 1
2 x 2 12V connectors (+150mm) 1
2 x 3 PCI-e (440mm) 1
2 x 4 PCI-e 0
6-pin Xeon/AUX connector 0
5.25″ Drive connectors (440mm + 150mm) 4
3.5″ Drive connectors (+150mm) 1
SATA Drive power connectors (400mm + 140mm) 2
Fan only connectors (thermostatically controlled 12V only) 0

Some of you are probably wondering if anything cool and unusual came with this power supply. Wonder no more, for the answer is, “nothing.” No manual, no power cord. It came out of a cheap computer case. And so, on we go to the load testing. I promise fun times ahead on the next page. Why don’t you all go grab a cold one, the next page is going to be fun.