Reviews - Enermax Galaxy DXX 850W EGX850EWL Power Supply
Sample Provided by: Enermax USA (By jonny on Fri, Jul-20-2007)

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Today I'm having a look at the Enermax Galaxy DXX 850W. The difference between the "DXX" (where the first two letters are the initials "D" and "X" and the third letter is an "X" for the Roman numeral ten) and the previous version of the Galaxy is that Enermax has increased the OCP (over current protection) on it's rails, increased the number of potential PCI-e express connectors and included 8-pin PCI-e connectors so it is compatible with 300W PCI-e graphics cards.

Above is a shot of the Galaxy DXX box. You'll note that under the Galaxy logo, it says "Quad CPU, Quad Core, Quintuple Graphics, 24-drives."

On the side of the box, Enermax breaks down how this is possible. The unit supports quad CPU or quad core simply because it has both 4+4 and 8-pin EPS connectors. There are also two separate +12V rails with a high OCP that are tapped off of a dedicated +12V rail that is used only for powering the CPU's.

The power supply also supports up to 5 150W PCI-e graphics cards. 150W PCI-e cards only have one 6-pin PCI-e connector, so they're saying that you could run five 7900GTX cards, for example, assuming you could find a motherboard that could hold them. You can also support two 225W or 300W PCI-e cards, which have two PCI-e connectors each. There also seem to be enough Molex and SATA connectors to support 24 hard drives.

On another panel, Enermax makes the claim that the unit is rated at 50°C. I'm sure we won't be hitting those kinds of temperatures, but it's good to know the unit is built to put out 850W, even at such high temperatures.

This side of the box also makes the claim that the Galaxy is 85% efficient. This is something we will be able to test. I think it's funny how they say with their 85% power supply that you are wasting zero dollars per year over other power supplies. Although you would save more money on your electric bill, the only way you're not going to "waste money" is if the power supply is 100% efficient. Besides, what happens when they come out with the 90% efficient power supply? Are they going to say you'll actually make $45 a year? Hmm.... Get to work guys! I need that extra check in the mail!

So here are some bullet points from the box. Some of the information here is good; 8-pin PCI-e connectors, rated at 50°C, 80 to 85% efficient, Active PFC and Universal AC input ("simply a MUST HAVE"... if you live in the EU or have no clue what your mains voltage is.)... some stuff makes no sense, like "SATA and PATA maximum" and "The REASON of change." Huh? They list that the unit is "tight and stable", but an actual figure based on actual regulation would be nice here.

The Enermax Galaxy comes with a status LED that provides information about the unit. Even if the fan fails, a blinking red LED, accompanied by an occasional beep, will tell you so.

Above is a representation of the DC output capabilities of the power supply as shown on the box. Note how +12V1 and +12V2 are grouped separately from the other +12V rails. This is because this power supply features two separate +12V transformers, one of which provides power only to the connectors that power the CPU via the motherboard: the 4-pin ATX12V and 8-pin EPS12V.

Enermax Galaxy DXX 850W +3.3V +5V +12V1 +12V2 +12V3 +12V4 +12V5 -12V +5VSB
Peak Output 30A 30A 24A 24A 24A 24A 24A 0.6A 6A
Max Combined Watts 200W 408W 408W 7.2W 30W

I wouldn't be Jonny if I weren't hypercritical from time to time... or perhaps all of the time. Note that outside of power available for the CPU, there is "only" 408W available on the +12V rails. There's another 408W available for just the CPU. But let's say you have only a single core CPU that only needs about 60 to 80W, or even a dual core that might need 100W or a quad core that might need 120W.

To put this into perspective, there is more power available to non-CPU connectors on the Infiniti 720W then there is on this Galaxy 850W. The Infiniti can do 672W on the +12V rails. If you subtract the 408W the Galaxy has for non-CPU connectors from that, that leaves you with 264W. That's 22A! 99.9% of you folks don't even need half that.

This power supply is no doubt made for someone with multiple processors, but I seriously doubt the bulk of the customers Enermax will get fits this profile.

Ok. Let's get the box open. The first thing we see is a little Enermax catalog, a healthy sized manual in multiple languages and a wiring diagram that features an overlook of all of the cables, their connectors and shows us what rails supply power to what connectors.

Above is a diagram that shows all of the cables, whether they're fixed or modular, the number of connectors on the cable and their length. I've reproduced this in my traditional table below.

Type of connector: Enermax Galaxy 850
ATX connector (fixed @ 600MM) 20+4
2 x 2 4-pin 12V connectors (fixed @ 550MM) 1
2 x 4 8-pin Xeon/EPS connector (fixed @ 550MM) 2*
6-pin Xeon/AUX connector (N/A) 0
2 x 3 PCIe (550MM, 3 fixed, 2 modular.  1 150MM adapter) 6**
2 x 4 PCIe (2 fixed @ 550MM, 1 150MM adapter) 3***
5.25" Drive connectors (450MM + 150MM + 150MM, 3 fixed, 10 modular) 13
3.5" Drive connectors (+150MM) 2
SATA Drive power connectors (450MM + 150MM + 150MM, 3 fixed, 12 modular) 15
Fan only connectors (thermostatically controlled 12V only) 0

* = One of the 8-pin connectors is actually a 4+4 that splits into two to create the 4-pin ATX12V connector.
** = Only 6 PCI-e connectors can be used at one time.  Because the connectors can be used as either
6-pin or 8-pin PCI-e connectors, they are essentially listed twice.
*** = An adapter is included that converts one of the 8-pin EPS12V connectors into a 6+4 (8-pin) PCI-e connector.

As you can see, there are far more cables here than most people reading this could possibly ever need. That's a good thing. And since the modular connectors, whether they are peripheral Molex connectors or SATA connectors, all use the same type of interface, you're allowed to mix and match as necessary.

There are quite a few fixed power connectors here,which wouldn't be such a problem since this is a modular power supply. Not only do we have the main ATX connector fixed, as well as two CPU power connectors, but we also have a fixed peripheral Molex connector cable, a fixed SATA power connector cable and three fixed PCI-e power connectors.

Inside the "accessory box" of the bigger Galaxy box there is a power cord, four mounting screws, all of our modular cables and a nylon bag to store unused modular cables.

Speaking of cables, here are a couple of the 8-pin PCI-e connectors. As you can see, two pins break-away to make a 6-pin PCI-e connector.

Also in the box are the stickers you see below....

There are two large "hub" stickers and two smaller case stickers.

I'm actually surprised the pictures of the hub stickers came out as well as they did. The art on the stickers are done like a hologram and change depending on the angle at which it's viewed.


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