please advise me about a Power Supply Unit. I am looking for one that is efficient and saves money on the electric bill. I like it be 500 Watts or more Can you Guys recommend a cool Case too?
thanks in advance
Why are you worrying about efficiency while wanting at least 500W capacity? A power-hungry high-performance system with an 80-85%-efficient supply will still use more overall power than a slower system with a supply of low (60-70%) efficiency.
Very, very few computers ever consume anything close to 500W. Typical draw is less than half as much, meaning a 350-400W supply will almost always be more than sufficient, provided it's honestly rated, but many aren't. Some exceptions are Fortron, Antec, Zalman, Seasonic, and PC Power & Cooling, with Fortron being the best bargain among these and often remarkable value.
Switching to an LCD monitor will probably help cut energy consumption better than any other measure.
For a cheap and stable PSU, I would recommend the XG Vortec 600 Watt. I use it in my computer, it has a 37A +12v, all RAIL's are very stable, the PSU is only $100. I cannot comment on the efficiency as neither the website or newegg.com where I bought it displays it (probably says it on the unit, but I'm too lazy to look).
~~Mad Mod Mike, pimpin' the world 1 rig at a time.
The Seasonic S-12 600W has one of the highest efficiency ratings ever recorded by THG. It's a little pricey, but it will pay for itself in a year over a less efficient PSU. See the review. Got mine from Mwave.com for $127.00 shipped.