DeepCool DQ750 ST PSU Review

1. Introduction2. DeepCool DQ750 ST3. DeepCool DQ750 ST (External)4. DeepCool DQ750 ST (Internal)5. High Res Gallery6. Testing Methodology & Results7. Closing Thoughts8. View All Pages

The DeepCool DQ750 ST is a decent power supply created to meet a very specific price point. We like the subtle appearance, and the quality of the paintwork is surprisingly good. The compact physical dimensions means the DQ750 ST will be ideal for adoption inside smaller cases. Sadly the lack of modular cabling means you may have issues routing all the cables inside space restricted chassis.

Technically the unit is unremarkable. Load regulation is acceptable, however it exhibits noticeable droop via both +5V and +12V rails. Ripple suppression falls within rated industry tolerance levels, however the +12V rail hits 75mV at full load which is a little higher than we would like to see, even from a budget oriented unit.

The 120mm fan does the job adequately, although in the last 200 watts of power output, it does spin up noticeably, emitting a fair bit of noise. Unless you can tolerate this, the DQ750 ST is a unit that you will want to keep running at 500 watts or less under load, at all times. The efficiency of the unit is actually very good, and we recorded close to 92% at close to 50% load which is a great result.

Internally, the DC-DC design is competent, if nothing out of the ordinary. I was rather disappointed to see a Chinese 85c rated primary capacitor incorporated, and although I have little experience with the ‘Elite' brand, I would expect them to be at a similar level to TEAPO. I appreciate Deep Cool have opted to try and reduce costs as much as possible, but I do always prefer to see quality Japanese capacitors in both primary and secondary stages. I have seen two 85c TEAPO branded caps basically explode in our labs over the years during some severe stress tests.

Right now there is no stock of the DeepCool DQ750 ST in the UK, although I was informed this week that Amazon will stock the power supply in January for only £59.99 inc vat.

There is no doubt the DeepCool DQ750 ST is very competitively priced at £59.99 inc vat. Many 750 watt 80 Plus Certified units we have tested in recent months are priced closer to £100 (FSP Hydro G 750W HERE and Corsair RMi 750W HERE). There is however a reason for this – to achieve this price point Deepcool have opted for a less effective non-modular design and they are using lower grade 85c rated Chinese capacitors in both primary and secondary stages.

Pros:

• competitively priced.
• good paintwork.
• 80 Plus Gold design is efficient.

Cons:

• non modular.
• can get noisy at full load.
• 85c Chinese capacitors.
• poor packaging.
• no user manual.

Kitguru says: The DeepCool DQ750 ST power supply is a decent option for those who want a very efficient power supply at the lowest possible price.

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