FAQ:?PSU FOR ECS K7S5A MOTHERBOARD (1)
Jiggs 22 Dec 2001

Disclaimer:?Author or OCWorkbench.Com and its staff will not be responsible from any PSU work related personal injury or material damage.?This FAQ’s full intent is to provide a tool for forum members to make a better decision when purchasing Power Supply Units intended for the ECS K7S5A motherboard. This FAQ is also applicable for those who are having similar problems on other boards.

1.?Introduction:

2.?PSU Rating Defined:

3.?What is the best brand PSU?

4.?My PSU is on the AMD Recommended/Approved list; do I still need a new PSU?

5.?Why is the +3.3V and +5.0V rail output so important?

6.?What about the +12V amp rating??Isn’t this important too?

7.?My system worked perfectly for almost a week but now it’s showing symptoms of a low powered PSU, could it be possible my PSU is underpowered?

8.?How can I tell my PSU is underpowered?

9.?But my bios or MBM readings on the +3.3V and +5.0V rails are within the ATX spec of +/-5%, yet my system fails to boot when all peripherals are connected.?I can only boot after pushing the reset button.? Why?

10. My PSU has an input power rating of 115V/60Hz; can I use it with a 220V/50Hz power?

11. When I turn on my system, the LED’s will come on for a second and then it totally shuts of with no indication of power.? I wait for a couple of minutes or less, push the power on switch and then LED’s will come on for a second and then off again.?What is wrong?

12.?What will be the troubleshooting procedure for a tripping PSU?

13.?Why does my system works perfect with a single stick of ram but locks up with two sticks?

14.?Why does my system works perfectly with 100/100 FSB but then will not boot when placed at 133/133 FSB?

15.?Is there a procedure I can use to modify my PSU to raise the output voltage of the +3.3V and +5.0V rails?

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