I am really pi**ed off with all the SMPSs I have been able to lay my hands on. I have tried out Mercury 350 Watts and Zebronics 500 Watts, but I am not too happy about their performance. The issue is with the voltage on the +12V line - it just doesn't stabilise. It keeps varying from 12.09 to 11.74 which is sickening. I like to see how things are with others (especially with antec). Can you post a graph or some such by stressing your video card a bit (play games... and see how the voltage varies on +12V line)? I use Asus PCProbe to monitor the voltages. You may use one of these to monitor voltages if you are not using Asus MB: http://www.almico.com/speedfan.php http://mbm.livewiredev.com/ I have absolutely no idea about these software and by no means do I recommend them Oh! And do mention the SMPS you are using. Thanks!