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Manufacturers: I-Star Enermax   Products: TC-500R8A (500W) EG651P-VE (550W)   Availability: Now   Authors: Pieter (dutchcedar) Bijleveld John (flashawk) Smith   Date: 3-25-03   Price: TC-500R8A: $526.40 EG651P-VE: $140.00

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There are 5 parts to this review, please use the pulldown below to browse sections or simply hit "Next" at the bottom of each section to continue

We often rely on the power supply's lower fan to help evacuate warm air coming off the CPU. In the case of the Enermax unit this is done with a 90mm adjustable speed fan on the bottom of the unit and an 80mm fan on the back. The Enermax should be mounted upside down to take advantage of this.

Enermax in place

Enermax Fan Speed Control

The I-Star however, is not laid out in the usual configuration. It relies on four 40mm Sunon fans (two on each unit) to keep things cool and receives the air flow through an array of perforations on the rear and sides. If the power supply is used as a major component in case cooling, this should be taken into consideration.

I-Star in place

In many ways it may be unfair to compare these two units side by side because they are as different as apples and oranges. The I-Star is not just about wattage, it's also about keeping your system up and running in the event of a failure. A single power supply simply cannot make such a claim because if it fails, your system is burnt toast, at least for awhile.

The hot swapping feature needs some comment. It works very efficiently, requiring only a light nudge of the sliding lock release and a pull on the handle. The power supply slides out quite easily and slides back in smoothly. Even the handles are nicely done, swinging out of the way when not in use.

I-Star Hot Swap Removal

I-Star Hot Swap Partially Removed

You can see in these photos that there's quite a bit involved when making power supplies hot swappable. It's amazing that I-Star has been able to pack all the features in such small units and have done so in a very elegant and tightly engineered package. Each power supply is only 1-7/16" (37mm) high, 4-5/8" (120mm) wide and 6-3/8" (165mm) long.

I-Star Hot Swap PSUs Front and Back

I-Star Hot Swap Bay

Beyond the advantages of redundancy however, are some other features we don't normally expect from a power supply. The three power-on LEDs on the back panel for example, are something we don't normal see. I-Star has taken things one step further, offering up three LEDs which can be mounted remotely to show the power status of the unit. For the case modders out there, the new toys to play with will be appreciated. For those really serious about knowing what going on in their system, this offers a little extra security.

I Star Remote LEDs