Reviews - Silverstone Element ST85EF 850W
Sample Provided by: SilverStone (By OklahomaWolf on Sun, Aug-30-2009)

Page 1 -

Greetings, fellow earthlings. It is another week here in the land of insanity I call my lab, and as usual I have a test subject to torture. This time, it is the 80 Plus Bronze rated Silverstone Element ST85EF. You may recall that past Element models have not done so well here, particularly the ST70EF. Well, that was then and this is now; and Silverstone has decided to go with a different OEM on this one: SevenTeam.

Let's have a look at some box shots, and then we'll have the SunMoon tell us whether the move to SevenTeam was a good or a bad idea.

As is typical for a Silverstone product, the English marketing points are right on the front of the box:

  • 850W continuous power output
    -ah, but at what temperature, dear Silverstone? Fifty degrees? Forty degrees? Minus two hundred nineteen degrees?
  • Class-leading dual +12V rails with 65A
  • High efficiency with 80%-83% at 20%-100% loading
    -uh... okay then. This would clear standard 80 Plus, but not Bronze. We'll have to see in the load testing whether or not we actually get Bronze performance, won't we?
  • Silent running 135mm Fan with 19dBA
    -fear not, I promise not to channel Mike and the Mechanics again for this review. In other words, I hope and pray that time and ti... sorry, I'll be more careful in the rest of the review. 19dBA? Not likely at full power, buddy.
  • Support dual PCI-E 8pin and quad PCI-E 6pin connectors
  • Support ATX 12V 2.3 & EPS 12V

Incredible performance and efficiency, the box says. Cables, the box says. Windmill, the box pictures.

Once again, Silverstone has taken the essential step of telling us what color the power supply within is. Hmm... operating temperature is given as 5-50 degrees. I smell an excuse to really crank up the hot box later.

Just in case you wanted to read the marketing hype in your native language, Silverstone is glad to help you out. Nine languages are represented here. But no Klingon. You say I'm beating a dead horse on that joke? Fine. But there's no Gaelic either.

The ST85EF is given the fancy two manual treatment, I see. Let me just unpack this here box for you.

Power supply, two manuals, a bag of screws, a bag of thumbscrews, some zip ties, some velcro ties, and a power cord were all crammed into that box.

One of the two manuals turns out to be a spec manual. It has lots of useful data in it, but this data does not include which rail goes to which connector. Doh! Further in, I found another useful little graph. Apparently, you only get 850W at 40 degrees. Output drops to 80% at 50 degrees. That's a 17 watt per degree de-rating curve. I haven't been this disappointed since they cancelled The Critic. Hotchie motchie!

Aw, what the heck... I'll heat it up good anyway. We'll see if it has overtemp protection that way, at least.

The other manual is a multilingual installation guide with lotsa pictures.

Our good friend Matte Black is in town again, because that's how most Silverstones are finished. In the center of the picture, you can see the usual Seventeam "Breakage Invalid" warranty sticker. Worry not, I'll breakage it good a bit later on. If it doesn't breakage itself first.

Here's another angle for you. There are a few ventilation holes in the sides, likely to help channel a bit more airflow to key components.

Most of the airflow, however, goes out of the unit here, at the back panel grille.

Silverstone ST85EF

+3.3V +5V +12V1 +12V2 -12V +5VSB
25A 30A 30A 35A 0.8A 3A
Max Power 180W 780W 9.6W 15W

The ST85EF has a respectable amount of combined power available, 65A, to the combined 12V rails, but it's a bit unevenly divided. One gets 30A of capacity, and the other gets 35A. The rest of the specs are nothing extraordinary, and pretty common for a run of the mill 850W unit.

Aha - Silverstone listened to me a bit and finished the sleeving on the cables! No more 250mm stretches of tangle prone wire! Now, if they could just cut back the length of the 250mm segments too, hiding these wires would be easier.

Type of connector: Silverstone ST85EF
4+4 pin ATX12V/EPS12V (565mm) 1 12V1
5.25" Drive (550mm+250mm+250mm) 6
3.5" Drive connectors (+150mm) 2
SATA (510mm+250mm+250mm) 6
6 pin PCIe (565mm) 1
ATX connector (550mm) 20+4 pin 12V2
6+2 pin PCIe (565mm) 2
6 pin PCIe (565mm) 1
Unit Dimensions(L x W x H)
162mm x 150mm x 86mm

Well, this is a bit strange. 12V2, the big one, gets three of the four PCI-E cables and the ATX connector. 12V1 gets everything else.


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