Cables and Connectors
The Enhance ENP-7025E is equipped with the following cables and connectors:
- One mainboard cable with a 20+4-pin connector (30 cm)
- One CPU cable with a 4-pin connector (29 cm)
- One cable with two PATA power connectors and a floppy-drive plug (28+15+15 cm)
- One cable with two SATA power connectors (29+15 cm)
Compared to the higher-wattage Enhance, there is a second SATA instead of one PATA power connector. Thus, the Enhance ENP-7025E allows building a generic configuration with one optical and one hard drive without adapters (if the drives are not far apart from each other as both SATA plugs reside on the same cable).
Like the previous PSU from Enhance, the Enhance ENP-7025E doesn’t detail its electrical specs but, considering that the combined load capacity of the two +12V lines is higher than the PSU’s total output power, we can suspect that it can deliver all of its power via the +12V rail.
Thus, the actual difference between this model and the FLEX-0130B isn’t large since the combined load on the +3.3V and +5V rails can hardly be higher than 40 watts in a real compact PC.
Being able to deliver all of its output power via the +12V rail and limiting the load capacity of the other rails to 80 watts, the Enhance ENP-7025E looks more up-to-date than the FLEX-0130B.
It is certified for the 80 PLUS Bronze standard.
Working together with our APC SmartUPS SC 620, the Enhance ENP-7025E was stable at loads up to 250 watts when powered by the mains but could only switch to the UPS's batteries at loads no higher than 235 watts.
Cross-Load Voltage Stability
It’s similar to the FLEX-0130B model. The +3.3V rail is very stable whereas the jointly regulated +5V and +12V voltages are the closest to the required levels right in the typical load range.
It is only at misbalanced load combinations that the voltages go out of the required ranges, but you can hardly encounter such situations in real-life applications.
Output Voltage Ripple
The output voltage ripple isn’t strong overall, especially on the +12V rail. It is far within the permissible limits on every power rail.
The same goes for the low-frequency voltage ripple.
The Enhance ENP-7025E is actually the best among the five tested PSUs in terms of its output voltage ripple.
Temperature and Noise
Like the other PSUs in this review, the Enhance ENP-7025E is cooled by a fan from ADDA. It is the 80x80x20mm AD0812HB-C70 model with 7 blades and a rated speed of 3010 RPM.
The fan starts out at 1140 RPM and maintains this speed until a load of 100 watts. Then it accelerates smoothly, reaching 2340 RPM at full load. The 80mm fan is quite audible at such a speed, but not particularly irritating.
Take note that the speed of the fan is just enough to keep the temperature at the same level. It is only at near-maximum loads that the temperature grows up a little.
The Enhance ENP-7025E is superior to every model with 40mm fan in terms of acoustic comfort, but noisier than the Seasonic SS-300TGW which has a similar form-factor.
Efficiency and Power Factor
The Enhance ENP-7025E is 83.1%, 86.1% and 84.1% efficient at the reference loads of 20%, 50% and 100%, complying with the 80 PLUS Bronze standard. The peak efficiency of 88.4% was observed at a load of 91 watts.
The power factor is but slightly higher than 98% at high loads, which is worse than average. This parameter isn’t crucial for home PCs, though.
The standby source is blameless.