be quiet! Dark Power Pro 850w ATX PSU
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.
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.
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.
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...