Help me to understand the brain-melting world of computer power supplies, why my new PC is having issues, and what I should be looking for in a new PSU... see within for the usual technical guff.
Here's the system that I have:
AMD Phenom X3 8650 cpu
Asus M3N78 motherboard
Single 9800GT 512MB graphics card
A couple of SATA HDD
Now, I thought that this Enermax 535W PSU
would be enough to handle all that, but after plugging it all in and switching it on, I didn't even make it into POST. However, this Thermaltake 480W PSU
gets things up and running all the way to Windows (though there are some stability issues as soon as I try to run anything too graphically taxing).
I've pretty much ruled out that either PSU could be faulty, as they both seem to run fine in a similar but lower spec PC.
I've tried looking over all the facts about voltages/amps/watts, and this talk about rails, and I think I've gotten a rough idea of how it all fits together, but my recent experience doesn't make much sense (the electrickery confuses me...)
So, the questions:
1.) Why did the 535W, dual 12V rail PSU not work, when the 480W, single 12V rail PSU did work?
2.) What should I be looking for in a new PSU?
Thanks in advance!