INTRODUCTION

   Using a good power supply unit in your brand new system configuration or even your old one is always the right thing to do not only because that way your system is pretty much guaranteed to function as it should and you may also save some of your hard earned money in electricity bills but also because you will never have to worry about something bad happening to your systems hardware components. Unfortunately many people seem to "judge" a PSU solely based on its output power something which really couldn't be more wrong since there are many mediocre (at best) brands out there that even carry 1KW models (some even higher than that) in their product lines (just recently a friend of mine got a 1200W model by one such company and it nearly fried his entire system). DeepCool luckily doesn't belong in that category and so today we're going to take a look at their latest DQ750 EVO Quanta 750W PSU model.

   Deepcool was founded with the mission of providing the best performance & humanized thermal solutions for worldwide customers. Deepcool design and manufacture a comprehensive range of high quality products, covering desktop cooling solutions, laptop cooling solutions, server cooling solutions, embedded cooling solutions, and other thermal components. Our goal is to maintain customer satisfaction by serving our customer’s ever-changing thermal needs and providing the quickest and most comprehensive service available. As our slogan goes, we wish you all “Enjoy your cool life”!

   The DQ750 EVO Quanta is a 80 Plus Gold certified semi-modular power supply unit with a total power output of 750W (850W+ peak) out of which up to 744W can be delivered by a single strong 62A +12V rail. The DQ750 EVO Quanta also features a MTBF of over 120.000 hours, 140mm PWM silent fan to keep the temperatures of the interior in check, long and flat modular cables, scratch-resistant coating, the usual CircuitShield array of protections by DeepCool including over voltage protection (OVP), under voltage protection (UVP), over current protection (OCP), short circuit protection (SCP), over power protection (OPP) and over temperature protection and is covered by a 5 year warranty.

SPECIFICATIONS AND FEATURES

PACKAGING AND CONTENTS

The main product features are mentioned at the front of the box right beneath a partial drawing of the product, the model name and the company logo.

All the available power connectors are listed on the left side.

The electrical table is placed on the right side of the box.

At the rear we find the features list along with several certification logos.

Instead of using the usual foam spacers for protection DeepCool chose to place the unit inside some short of an airbag/bubblewrap.

Along with the DQ750 EVO Quanta and its modular cables you will also get the power cord, 4 mounting screws and a small warranty card.

THE DQ750EVO QUANTA EXTERIOR

The enclosure of the DQ750 EVO Quanta features a nice scratch-resistant dark grey powder.

The previous DQ750 had a 140mm LED fan but as you can see the DQ750 EVO has a regular one.

On one side of the enclosure we see a large sticker with the model name on it and on the other we see another sticker with the electrical table on it.

All six modular connectors are both color coded and tagged.

Unlike normal cables flat modular cables require no sleeving.

At the rear we find the usual honeycomb perforated area and the on/off switch.

THE DQ750 EVO QUANTA INTERIOR

The 140mm PWM fan used is manufactured by Yate Loon Electronics and can reach speeds of up to 1400RPM to produce up to 62CFM of airflow with just 29dBA of noise.

The interior design features a single large heatsink and looks like CWT is responsible for it.

For the primary capacitor the manufacturer chose one by Nippon Chemi-Con rated for 105 degrees Celsius.

Secondary capacitors are manufactured by CapXon and Rubycon (also rated for 105 degrees).

TEST BED

TESTING METHODOLOGY

     Using a dedicated measurement instrument such as a Chroma or a SunMoon to test power supply units is without doubt the most ideal and accurate way (not to mention the fastest) to do that currently. However it's certainly not the only way there is and so pretty much anyone can test a power supply unit just by using a computer. Certainly limitations do apply and so you can't really test a 1000W power supply if your system only uses 500W at peak loads and that's why during the past 5 years i have saved certain hardware components for the purpose of building a dedicated PSU test rig. True it may not be as accurate as the above mentioned solutions but it comes really close and is in fact closer to real world usage. So as always we ran several games with maximum graphic options enabled at a resolution of 2560x1600 in order to stress every hardware component and increase the overall power demands of the system. The Passmark BurnIn Test was also used to overstress the components in an effort to provide the most accurate results possible. As a final test we also used the latest OCCT 4.4 software and its dedicated PSU testing suite since it can really bring a power supply to its knees after inside a few minutes.

       Rail stability was checked/measured with the CPUID Hardware monitor and a Metex multimeter which also recorded the system load in idle and in load. As always try to remember that the power consumption numbers listed in the graph are the highest (Peak) ones recorded during the entire duration of the tests and not the average ones. Noise levels coming from the fan were recorded using the high precision HD600 ExTech Sound dBA Meter from the rear of the unit and at a range of no more than 5-10cm. Readings under load are recorded the exact moment we manually switch the fans of all graphics cards from full speed to almost zero, that way the fan of the power supply does not have enough time to slow its RPM and so by doing this we get very accurate noise level readings. Needless to say in order to get 100% accurate readings you need to have a noise isolated room for that exact purpose, something which is quite impossible unless you are working inside a real lab (some people use very small noise insulated boxes but due to their size both heat and noise exceed normal levels and so the results can't really be considered to be 100% accurate). Also do take into account that since all noise measurements take place from just 5-10cm away the final noise levels to reach your ears will be considerably less.

TEST RESULTS

RAIL STABILITY

The DQ750 EVO Quanta offers very good rail stability and to be honest with all of you even better than I had hoped.

POWER CONSUMPTION

Once again our test rig managed to max out the power of the PSU at hand (even if just by 19W).

NOISE LEVELS (SPL)

Just 41.6dBA of noise at full load is pretty much excellent.

CONCLUSION

   DeepCool may not be one of the oldest PSU brands around but thanks to their cooperation with CWT (Channel Well Technologies) they have released many successful models like the DQ750, DQ1250 and now the DQ750 EVO. Unfortunately they’ve yet to venture into the 80 Plus Titanium certified area (not the Platinum one, at least not for good) but any Gold certified model that performs as well as the DQ750 EVO Quanta is good enough in my book. Noise levels may not be the most “important” aspect of any gaming oriented PSU since graphics cards tend to be louder but regardless the DQ750 EVO Quanta does extremely well in that area.

   Currently the DeepCool DQ750 EVO Quanta 750W 80 Plus Gold certified power supply unit retails for 126Euros inside the EU (Amazon.co.uk) and unfortunately is not available inside the USA (at least not where we looked for it). This is a problem we’ve had in the past with DeepCool so I hope they will resolve it soon. Overall we think that the price is right (it could be slightly better however) and since the DQ750 EVO Quanta offers solid performance with very low noise levels and many features it gets our Golden Award.

PROS

- Build Quality
- Solid Rail Stability
- Low Noise Levels
- Flat Modular Cables
- 5 Years Warranty
- 80Plus Gold Certified
- CircuitShield Electrical Protection Suite (OVP/SCP/OTP/UVP/OPP)

CONS

- Current Availability