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On the unit is a single LED that is green when the computer is on and red when the computer off. When the computer is on, the device merely acts as an extension; the two fans connected to the unit are still powered by what they’re usually powered by. When the computer turns off, the fans then become powered by 5V rail from the ATX cable. Because power is from the 5V, fan RPM will drop. Lights from the connected fans (if any) will become dimmer as expected. With the drop in RPM also comes the drop in noise. Though the fans are still running, the computer will be silent.f</p> <p align="center"><img src="atruereview/ecs/06.jpg" width="292" height="170" alt="Evercool Extended Cooling System (ECS)" title="Evercool Extended Cooling System (ECS)" border="0"></p> <p align="center"> </p> <p><strong>Testing:</strong></p> <p>To find out if the ECS makes a difference, I ran the computer for a while then turned it off. The computer was in an idle state when it was shut down. After six minutes I recorded the temperature of the CPU. I repeated the test using the ECS to power my CPU fan. Room temperature was about 18°C or 64°F.</p> <p> Temperature was recorded by turning the computer on and recording the BIOS temperature. This test will have a strong error percentage based on the board thermal diode and the 15 sec of power on before the BIOS temperature is recorded. Even with the error, it will still show the cooling performance gain. </p> <table width="468" border="1" cellspacing="0" cellpadding="0"> <tr> <td width="166"> </td> <td width="150"> <div align="center"><b>Idle</b></div></td> <td width="153"> <div align="center"><b>5 min off</b></div></td> </tr> <tr> <td width="166" height="25">No ECS</td> <td width="150" height="25">35.0°C (95.0°F)</td> <td width="153" height="25">32.0°C (89.6°F)</td> </tr> <tr> <td height="24"> <p>ECS</p></td> <td height="24">35.0°C (95.0°F)</td> <td height="24">27.0°C (80.6°F)</td> </tr> </table> <p>The fan acutally stayed on for six minutes. Quite a big temperature difference!</p> <p><strong>Conclusion:</strong></p> <p> The Extended Cooling System is a very simple and an effective addition to any air cooled computer. Installation is very simple and can be integrated into nearly any system. Whether system damage can occur from not cooling your system with the power off is debatable. This device ensures you will not have to take that chance, especially if you are overclocking. It is always nice to have a piece of mind when it comes to cooling our computers and the ECS offers just that.</p> <p><strong>Pros:</strong></p> <ul> <li> Easy to install</li> <li> Well labeled</li> <li> Small</li> </ul> <p><strong>Cons:</strong></p> <ul> <li> 3 Pin fans only (no direct support for Molex connected fans)</li> </ul> <p>Excellent<br> </p> <p><a href="atruereview/ecs/index.php"></a> <a href="ecs/index.php">Previous (Introduction, Features & Installation)</a></p> </div> </td> </tr> </table> </div> <div id="footer" class="clr"> <div class="rk-1"> <div class="rk-2"> <div id="the-footer">  </div> </div> </div> </div> </div> </body> </html>