FrostyTech.com Heatsink Reviews and Analysis
      
TOP 5 Heat Sinks     TOP 5 Low Profile Heat Sinks     TOP 5 Liquid Coolers    
 Reviews + Articless     News     HSF Mfg's Index     Advanced Search    

Zalman 300W ZM300A-APF Quiet Power Supply
Zalman 300W ZM300A-APF Quiet Power Supply
  86%   
Abstract: Zalman have founded their company on the concept of providing cooling and related products which adhere to their own CNPS (Computer Noise Prevention System).

 Company link  Category  Published  Author 
Zalman   Power Supply   Sep 18, 2002   Max Page  
Home > Reviews > Page Title: A look at the new Zalman power supply

A ways back we reviewed the Zalman ST300BLP which was very quiet, but lacked sufficient air vents in our opinion. While this may by a totally subjective standpoint to take, the ZM300A certainly has proven that Zalman have improved on the design of old.

The ZM300A-APF is pictured on the top in both of these photos. Compared to the older model the ZM300A offers a few immediate upgrades . First and foremost, the use of a wire grill reduces noise when faster fans are used so cooling levels can be increased without creating more turbulence, and hence noise. Secondly, since the ZM300A is an Active Power Factor Correction power supply the little red switch which sets the PSU to 115VAC or 230VAC is no longer necessary.

Where the older power supply was just a solid piece of metal (right), the newer ZM300A-APF has been filled with much needed vents. We actually took a saw to the old ST300BLP and hacked out a vent of our own to improve case air flow. You can see the end result of the power supply mod job for yourself right here.

The rear of the 300W ZM300A-APF on the left again has also benefitted from a healthy dose of venting. In our previous review we were concerned that the ST300BLP might not offer a level of case venting that it should because of the limited amount of internal vents. The new ZM300A has taken the internal hestsink to the next level as well, using a slightly improved model to cool the electronics.

Power tests:

For testing, we took a peek at the voltages with the system under load. This is not the most exact way of measuring a power supplies' electrical tolerances, but it does give a bit of insight into the degree of DC voltage jitter. The results are shown in the table below.

Listed Voltages AMP Lower Voltage Upper Voltage Jitter
3.3v 28A - 3.26v - 3.29v 0.03v
+5.0v 40A - 5.02v - 5.02v 0.00v
+12v 15A - 11.67v - 11.73v 0.06v
-12v 0.8A - 11.78v - 11.86v 0.08v
-5.0 0.3A - 4.84v - 4.84v 0.00v
+5.0sb 2.0A - 4.99v - 4.99v 0.00v

The Zalman PSU offers quiet performance and 300W of power which is an excellent combination on any scale. As temperatures within the power supply increase, the speed of the rear exhaust fan is dynamically adjusted to compensate. The user doesn't have to turn a dial, or set the fans speed themselves.

The key here of course is the very low noise level the power supply falls under. That can be a great benefit to users assembling systems optimized for lower noise signatures (the ZM300A measured around 36db from about 16" off the rear in our tests), and yet still need something with the wattage to support multiple drives and the Pentium 4 platform.

Without unnecessary flash, the Zalman ZM300A-APF offers itself up as a good low noise power supply that will ensure there is one less thing to hear when you hit that power button.

Related Articles:

Here are a few other articles that you might enjoy as well...

1. Verax GmbH P11T Silent Heatsink
2. Zalman CNPS5700D-Cu Ducted P4
3. Zalman CNPS6500B-Cu Pentium 4
4. Zalman ST300BLP "Black Box PSU Mod"
5. Zalman 300W ST-300BLP Quiet PSU
6. Vantec Stealth Fans



 Previous Page °
Heat Sink Review Index  

Table of Contents:

 1:  Zalman 300W ZM300A-APF Quiet Power Supply
 2: — A look at the new Zalman power supply

List all Zalman heat sinks that Frostytech tested?

Follow Frostytech on FacebookFrostytech News RSS FeedFollow frostytech on Twitter
Resources
° Got Feedback?
° Mk.II Test Platform
° Where To Buy?
° Manufacturer Index
° Industry Dir.
° Cooling Projects

Scythe Ninja 4 SCNH-4000 Heatsink Review

DeepCool Maelstrom 240 Liquid Cooling System Review

DeepCool Gamer Storm Lucifer K2 Heatsink Review

Gelid Antarctica Heatsink Review

Noctua NH-D9L 3U Low Noise Heatsink Review

BeQuiet Shadow Rock LP Heatsink Review
...More Articles >>




Websites you may also like:
PCSTATS

Google Search Frostytech

Time stamped: 9:38AM, 11.23.2017
In Case You Missed it...
°  Scythe's Mugen 5 Rev. B

°  Noctua NH-L12S Low-Profile cooler

°  Corsair's ML120 Pro RGB fans pair

°  Scythe Mugen 5 Rev B SCMG-5100 Heatsink Review

°  Samsung to continue adopting heat pipes for smartphones in 2018

°  be quiet! Dark Base 700 Case Review




FrostyTech.com
Since June 1999


Find a Heatsink / RSS Feeds
Latest Heatsink Reviews
Top 5 Heatsinks Tested
News RSS Feed
Reviews RSS Feed


Social Media
Facebook
Twitter
Pinterest


FrostyTech.com Info
Feedback
Contact Us / Heatsink Submissions
Submit News
Legal
Suite 66
© Copyright 1999-2017 www.frostytech.com All Rights Reserved. Privacy policy and Terms of Use
Images © FrostyTech.com and may not be reproduced without express written permission.
Current students and faculty of accredited Universities may use Frostytech images in research papers and thesis, provided each image is attributed.