be quiet! Dark Power Pro 850w ATX PSU

Internal Components

Internal Components

Having already reviewed the 650w version of the Dark Power Pro it will certainly be interesting to see what has been changed inside the 850w version to provide it with an extra 200w of power. Quite often the upgrade can be as simple as slotting in a higher capacity transformer and capacitor, while other times a complete re-design of the PSU internals is necessary.

be quiet! 850w Inside be quiet! 850w internals
 
be quiet! 850w internals be quiet! 850w modular backplane
 
First up on the list of changes from the 650w Dark Power Pro is an upgrade to a higher quality CapXon 400v 680uf capacitor. This is accompanied by changes to several of the wire wound inductors and the inclusion of what looks like smaller filtering capacitors across certain areas of the modular connector backplane. Much like the 650w version, all cables entering the unit are bunched together with cable ties and cooling of the mosfets is provided by three black aluminium arched heatsinks.

be quiet! 850w Transformers be quiet! 850w Mains Filtering

The image above-left shows the two transformers (yellow blocks) within the unit. These are responsible for the conversion of mains voltage down to more manageable voltages such as 12v and 5v. Interestingly the transformers used are exactly the same as those used inside the 650w unit, possibly indicating that the 850w unit has received just a few tweaks and small changes in order to achieve the 200w higher power rating.

be quiet! Dark Power Pro 120mm Fan

The 120mm fan used inside the Dark Power PRO is manufactured by Protechnic Electric and has a model number of MGT12012LR-O25. As we can see from the specifications below, the fan is able to push a reasonable 61CFM through the PSU with a noise output of 31dBA. These figures combined with a heat based fan control should result in an extremely quiet unit.
 
Model: MGT12012LR-O25
Dimensions (mm): 120x120x25
Airflow (CFM): 61
Speed 1800 RPM
Noise (dBA): 31

Let's move on now and find out just how well the unit performs over on the next page...

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Most Recent Comments

04-12-2008, 05:29:13

JN
"After reviewing the 650w model earlier in the year, be quiet! offered us a chance to take a look at its slightly beefier bigger brother. Will it woo us just as much, read on to find out..."

http://www.overclock3d.net/gfx/artic...211652612s.jpg

be quiet! Dark Power Pro 850w ATX PSU

04-12-2008, 06:00:00

Rastalovich
It's undeniable that these psus are good, with the quality that comes with the packaging etc to boot.

I do think they`ll get overlooked tho with the prices they attach to them.

04-12-2008, 06:39:46

JN
Quote:
Originally Posted by name='Rastalovich'
It's undeniable that these psus are good, with the quality that comes with the packaging etc to boot.

I do think they`ll get overlooked tho with the prices they attach to them.
Yeah the 650w is certainly quite a bit above what is deemed acceptable, but thankfully the 850w sits roughly in the middle of the pack price wise. Sure there are some real cheap 850w units out there...but there is certainly a reason for it...even if they do have a good brand name attached.
Reply
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