E-Power EP-2KW 2000 Watt Review

Admin - 2008-02-27 19:45:01 in Power Supplies
Category: Power Supplies
Reviewed by: Admin   
Reviewed on: March 5, 2008
Price: $699.00


Most of us take power for granted. Flip a switch and the light comes on. Open the fridge, grab a cold one. Push the button on the coffee pot, out comes hot, steaming java a few minutes later. Push the power button on the case, the PC fires up. But, there is more to it when choosing a power supply for your rig. For mom and pop, or the average internet surfer basically any old power supply will do. For the power user, whether be it gamer, designer, media encoder, etc., you want to make sure once the button is pressed that there will be enough power behind it to keep the machine stable with power to spare. Trying to power today’s quad core CPU, dual, triple or even (gasp!) quad video card machine with gobs of memory and terabytes of storage with just any power supply just spells disaster, or at best many nights of frustration and your favorite choice four letter words.

The e-Power EP-2KW 2000W (yes, that’s two thousand watts) power supply is ready to take on the duty of supplying the most demanding hardware thrown at it. E-Power is the retail side of OEM power supply manufacturer Top Power.


Closer Look:

The EP-2KW is currently shipping and will arrive in a “white box”, although if demand significantly increases, there will be retail packaging. This unit is aimed squarely at the enthusiast who will want to future-proof their investment with the best. The power supply comes very securely packaged with enough closed cell foam to ensure safe passage through the likes of the gorilla shippers. The shipping weight of the package comes in at 20 pounds. Freeing the beast from the packing shows the heart of the unit. Measuring 7.5x7x8.5in (HxWxD) it is not a small unit. The business side (rear) of the power supply has a 120mm exhaust fan with the chrome grill (no stamped steel here) for optimum airflow. Two power inputs, a 4 pin input, and the three mail leads that connect to the breakout box that mounts in the case. The side that will get the most attention (front) boasts a matching 120mm intake fan with the chrome grill. Below that in the lower right corner is the power switch, and in the upper left corner you will notice three leds and potentiometers (pots). The production units will have labels for the +3.3V, +5V, & +12V adjustability modes. With these pots, the ability to fine tune the output voltage on these lines is a great feature.



A closer look at the power inputs and four pin on the rear. And a look at the three pots from the front. The top of the power supply just has the lonely power rating information. You can see that there are 7 +12V lines available, three at 20A a piece and four at 22A each. The 4 pin connection next to the main power connector is an additional power connector for those who need to supply a bit more juice for that water cooled rig.



The second part of the equation is the breakout box that mounts in the case that connects to the hardware. Starting with the rear of the box there are three color coded inputs for the matching cables from the main power supply. The side lists the connector types for the component cabling system. The front has the bread and butter of the system. Again, using color coded inputs for the main lines and DIN connectors for the accessory lines. The inclusion of DIN connectors ensure good contact is made and there is little chance the cable will pull out.



Closer Look:

There is absolutely no need to open up a power supply, especially if it has had power going through it recently since the capacitors will hold a charge and give you a pretty good shock if you happen to short them out accidentally. We open it up so you don’t have to. Getting inside the main power supply we are greeted with two 1000W power supplies that are run in parallel to achieve the 2000W rating. The power supply internals are industrial grade and built to last. The dual capacitors, coupled with the thick copper wound inductors on each board on the primary side, the transformer sitting between the large black heatsinks, and heavy gauge wire on the secondary side make for a winning combination.










The fans used in the power supply are Sanyo Denki: San Ace 120 fans with a 88CFM rating and 40 dB noise rating. The fans are on the loud side, but is it a low “whir” and not an annoying “whine”.



Getting into the breakout box is nothing too exciting. Just really a crossover for the main leads to the main power and accessory power leads.



The EP-2KW comes with an impressive amount of cables. First up are the main lines, the 20+4 pin motherboard connector, 8-Pin EPS12V connector, and 4-Pin ATX12V P4 connector. Four DIN cables with 4 SATA connectors each for a total of 16 SATA connectors. Two DIN cables with three 4 pin Molex and one floppy connector for a total of 6 4 pin Molex and 2 floppy connectors. Last but not least, five DIN cables consisting of three 6+2 Pin and two 6 Pin PCI Express cables complete with shielding and EMI filters to stabilize any interference.







AC Input

110-240Vac 10/5A 60/50Hz

DC Output



























Connector Specifications

950 Watt

20+4 Pin


12V 4 pin


12V 8 Pin


Serial SATA


PCI-E 6pin


PCI-E 6+2 pin











Voltage measurements are taken with a digital multimeter with the probes inserted into an unused 4-pin molex connector for the 12V and 5V lines. For the 3.3V line, the probes are inserted into the appropriate pins on the 24-pin connector. The system is allowed to idle at the desktop with only system tray programs running and the results are recorded over 5 minutes in 30 second intervals and the average result recorded. For load readings, Stressprime 2004 Orthos Edition is run to hit the CPU and memory, HDTune for the hard drive, and 3DMark06 will stress the GPU. The same methodology is used for recording voltages. Temperatures are measured with a digital thermometer with the probe inserted into the case of the power supply to measure temps at idle and load.

Testing Setup:



The availability of pots to fine tune your voltage is awesome. The added plus of the LED's to let you know if you are in the +/-5% range just adds to the value of this power supply. For testing the pots were adjusted to within the +/-5% range and left for the duration of testing. AS you can see, the rails did not budge, even with the 125W TDP 6000+ maxxed out.


The E-Power EP-2KW 2000W power supply is an awesome piece of machinery, I do wish that the correct tools to test this power supply were available to put it through its paces, but unless you are looking to run a fully decked out Skulltrail with quad graphics, and pelt cooled the CPU’s and GPU’s you shouldn’t have a problem hitting the limit of what this power supply has to offer. Currently they are being built to order and quality tested before shipping. Top Power, E-Power’s parent company, is well know for producing high quality power supplies so this is no different. The only caveat being is the size of the unit, and the length of the cables from the power supply to the back of the case. With a mid tower there was just enough length in the cables to have it comfortable situated, a full tower may have some problems with the length. Currently this is about as future proof of a power supply to get that should have no problems what-so-ever running today’s and tomorrow’s hardest of hardcore machines.

While $699 may be a steep price to pay for a power supply, the average price for 1000W-1300W currently is in the $300-400 range. This is a high end enthusiast product that should give you a good return on investment with longevity. Instead of buying a 1000W+ power supply now for $200-300, and another 1500W-2000W power supply in the future when required, the hit now will save you in the long run.