Our load tests utilize a couple of FAST ATE active load testers and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.
The tests performed are based around six conceivable setups that are out there and progressively load down the PSU up to the power supply's limits or 1000W, whichever comes first. Since our test equipment's limits are higher than that of the Jou Jye BW-B620JL, we can test it to the maximum.
One nice thing about knowing that the Jou Jye BW-B620JL is almost identical to that of the Antec HCG-620 is that we have something to compare it to. As you can see, the BW-B620JL has excellent voltage regulation. Although the regulation isn't quite as high as we saw with the Antec unit, it still performs within 1%. Asking for better regulation is being way too picky.
Just as we saw with the Antec unit, we experienced somewhat of a less than desirable DC output quality with the BW-B620JL. The unit started off in Test 1 with 28mV of ripple on the scope. During Test 2, this had already reached a reading of 41mV peak to peak on the 12V rail. This climbed even more during Test 3, reaching a maximum of 56mV. By the time we hit the end of the last test, we were looking at 67mV of noise peak to peak. ATX specifications allow for up to 120mV of noise, however it is nice to see it kept under 50mV.
Jou Jye's BW-B620JL comes rated for Bronze efficiency from the 80Plus organization. This means the power supply must be 82%/85%/82% efficient at 20%/50%/100% loads respectively. Our unit does so with plenty of room to spare and we have no complaints about the unit here.
Just as we saw with the HCG-620, there are a slew of reasons that steer you both towards and away from the unit. On the plus side, you've got excellent voltage regulation and build quality. This is balanced out by the poor DC output quality and lack of a few key features. Sadly enough, the scales tip away from being in your favor if the price ends up being even close to what it costs in Europe.
At this point in time, you're surely wondering about the most intriguing feature of the BW-B620JL PSU. You'll have to keep reading and come back another day as we are giving this feature its own coverage. Stay tuned as this will be available for your reading pleasure soon.
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- Page 1 [Introduction, Specifications, Availability and Pricing]
- Page 2 [The Packaging]
- Page 3 [Inside the Box]
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