Zippy Emacs GSM-6600P G1 600w PSU


Load Testing

In order for the results from all current and future PSU reviews to remain fair and comparable, Overclock3D uses a custom built Power Supply load stress tester.

The tester will be placing the following loads on each of the GSM-6600P's rails:

+3.3v - 20a Load
+5.0v - 20a Load
+12v - 40a Load

The results are collected from a Mastech MAS-345 Multimeter which logs its readings via RS232 to a PC.

Zippy Emacs G1 600w 3.3v Rail Zippy Emacs G1 600w +5v Rail

The results speak for themselves - NO fluctuation was observed on either the +3.3v or +5v rails. This is simply amazing for a unit placed under such a high load.

Zippy Emacs G1 600w +12v Rail

After being so impressed with the +3.3v and +5v rails on the Zippy, we wanted to give the unit a real hard time and decided to place a 40a load on the single +12v rail. This counts for 100% of the rails total rated load and on most power supplies we'd expect to see quite a dip in the voltage. However, the GSM-6600P performed admirably, with the voltage only dipping by 0.04v taking it down to bang on 12.00v.

Efficiency Testing

Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains against the power (in watts) consumed by the OC3D power supply stress tester.

The results may not be as accurate as those produced by professional testing equipment, but will certainly come in handy when comparing several power supplies against each other.

Zippy Emacs G1 600w Efficiency

The Zippy Emacs was placed under a load of 646 watts. This counts for a total of 107% of the power supplies rated output. At this load, the power supply required 764 watts from the mains to produce the 646 watts required by our custom made power supply tester. Therefore the efficiency of this power supply can be found by a simple equation: (646 / 764) * 100 that works out to be an efficiency rating of 84.5%.

Noise Testing

Possibly the hardest part of any PSU review is summarising the level of noise given out by the unit. The threshold for what is considered 'noisy' varies from person to person and therefore what I may consider a quiet unit, another person may consider extremely loud. A common way to resolve this issue is to use a dBA meter to measure the units noise level, however this doesn't take into account the pitch (type) of noise emitted and whether it is likely to irritate end users.

For this reason OC3D records all power supplies at idle and load in wav format for you to make your own informed decisions. All recordings are taken at 30cm away from the PSU and outside of a PC case. You will need to remember that noise levels will be reduced by varying amounts once the PSU has been installed inside your PC enclosure.

Idle Recording - Download
Load Recording - Download

At idle I found the GSM-6600P to be reasonably quiet. With the unit installed inside a PC enclosure, I am confident that the unit would have been inaudible.

Placing a full load on the unit caused the fan speed to increase significantly thus increasing the noise levels at the same time. Despite the load recording above sounding quite high-pitched, I was pleasantly surprised with the way in which the GSM-6600P controlled the 80mm fan, keeping noise levels as low as possible.

«Prev 1 2 3 4 5 6 7 Next»

Most Recent Comments

06-10-2006, 03:52:53

"Zippy Emacs are a name that only the most informed computer enthusiasts among us would have heard of. Today I'll be taking a look at their 600w GSM-6600P(G1) PSU as they make their way into the mainstream market."

EDIT: Oh, and it would appear that this is a world exclusive too


06-10-2006, 04:12:17

Looks sweet.


06-10-2006, 06:06:08

Now that is a 1337 PSU, wow... Sweet results! Nice review Jim. Dugg.Quote

Register for the OC3D Newsletter

Subscribing to the OC3D newsletter will keep you up-to-date on the latest technology reviews, competitions and goings-on at Overclock3D. We won't share your email address with ANYONE, and we will only email you with updates on site news, reviews, and competitions and you can unsubscribe easily at any time.

Simply enter your name and email address into the box below and be sure to click on the links in the confirmation emails that will arrive in your e-mail shortly after to complete the registration.

If you run into any problems, just drop us a message on the forums.