OCZ EliteXstream OCZ800EXS 800 Watt Power Supply
Author: Frank Stroupe
Editor: Shawn Knight
Date: 05-24-2008
Provided by: OCZ Technologies
A Closer Look

The EliteXStream 800 sports a shiny black powdercoat with a single 120mm fan. OCZ has chosen not to make the EliteXStream modular. That isn't particularly surprising as PC P&C doesn't make their power supplies modular, though OCZ does have a line of modular PSUs, the ModXStream.

OCZ makes two models of the EliteXStream, the 800 watt and a 1kW model.

At about 6” x 3.5” x 6.5”, the EliteXStream is not as large as some other higher wattage power supplies, but still significantly larger than the old ATX standard. It will easily fit into all full towers and should fit into nearly all mid towers with no problems.

The OCZ logo is stamped into the side of the PSU and looks pretty cool. Unfortunately, this will be hidden when installed, rather the specs label side will be exposed.

The rear of the PSU has a very open honeycomb mesh which should allow for more than ample airflow. The only adornments are an I/O switch, an LED and the power cord connector. The LED is lit when the PSU is plugged in and the I/O switch is turned on.

Since opening the OCZ800EXS voids OCZ's 5 year warranty, I opened it up so you can take a peek inside.

Nearly 50% of the interior is covered with heatsinks. I've never seen heatsinks quite like these; they are “pin finned” and really have a lot of exposure for heat transferal. The power supply has a pair of primary transformers, as do most higher quality/high wattage PSUs. There are three large filter capacitors, most power supplies only have one or two. This should ensure some really clean power.

OCZ also chose to go with PC Power & Cooling's large single +12v rail, sporting 62A of current, rather than multiple +12v rails. Building a power supply with multiple rails is less expensive and easier than going with a single rail, but so much potential power is lost in the process.

For example, say you have a PSU with four +12v rails at 20A each. One of the rails powers the motherboard and CPU, and will never have a need for that much current. Two of the rails will power each PCI-E pair, one per video card. If you don't use but one video card, an entire rail will be unused. PC Power & Cooling contends that a multiple +12v PSU is ineffective for this reason, and that a single large +12v rail allows for much more practical use of the available power.

The EliteXStream is 80plus certified. Going green is today's trend, and higher efficiency saves you money along with helping the environment. Plus, higher efficiency means the power supply isn't working as hard.

The cables are all sleeved in black mesh and are easily long enough for use in a full tower. Each mesh sleeve is finished in heavy heatshrink tubing. As in some other upper-end PSUs, there is a little more space between the connectors and the end of the sleeving, to allow more flexibility to the connectors, to prevent damage to delicate hardware power inputs. Also, there is no sleeving between the Molex and SATA connectors, once again to keep the cables more flexible. I have had a couple of other power supplies configured this way, and though your rig looks a little less clean with all of the exposed wires, I really do like the extra flexibility. I am always afraid of damaging the motherboard or hard drives due to very stiff cables.

There are four separate PCI-E cables. All of them have combination connectors that will accommodate 3-pin and 4-pin PCI-E sockets, which will take care of any SLI or Crossfire configuration you'd use with this power supply - 2x any video card combination, or 3x mid-range video card. You would not use this power supply with a trio of 9800GTX, trio of X2s, or trio of any 8800 series; you need to be in the 1100-1400 watt range for that.

This is the first PSU I've seen with a 24-pin motherboard connector rather than 20+4. The ATX +12v connector is 8-pin only, rather than a pair of 4-pin connectors, also a first for me. I have been wondering when the PSU manufacturers would begin eliminating the older connectors. I haven't bought a 20-pin motherboard in over three years, and have had only one with a 4-pin ATX +12v in that time, but an 8-pin cable worked just fine with it.

Connectors include:

20+4 motherboard connector (24-pin)
ATX +12v (8-pin)
4 x PCI-E power (6+2-pin)
8 x 4-pin Molex (on two cables)
8 x SATA power (on two cables)
1 x Floppy

Included with the EliteXStream is a 16ga power cord, installation manual, black screws, and a couple of zip ties.

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