Power problem?

[geniusender]

Actually it is possible that i may upgrade my computer to these following specifications:
Processor:Corei7 920 2.66GHz
Motherboard:Asus P6T
Ram:4GB
Graphic CardTwo) Geforce GTS 250
Hard Disk:640 Gb SATA
DVD Drive:Super Combo.
So i need to know that how much power supply (PSU) i may need to handle this stuff.

 

[geniusender]

Thanks,
I will buy PSU of 700watts.

 

[JohnnyLucky]

The general rule of thumb is a high quality 500 to 550 watt power supply with sufficient current (amps) on the +12 volt rail(s) can easily power a system with any single video card made. A high quality 700 to 750 watt power supply with sufficient current (amps) on the +12 volt rail(s) can power a system with two video cards operating in dual mode. There are a few exceptions like the new ATI Radeon HD 5XXX series cards which use less power due to their energy efficiency and the brand new Nvidia GTX480 which uses a lot more power.

A high quality 500 to 550 watt psu will have a +12 volt rail rated at 40 amps. A high quality 700 to 750 watt psu will have a +12 volt rail rated at 60 amps.

In addition the power supply should be at least 80+ Bronze certified for energy efficiency. There are some models available which have achieved 80+ Silver and 80+ Gold Certifications.

Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. Lately we've been seeing a few other brands offering some high quality units. One example would be the newer Antec power supplies.

 

[JohnnyLucky]

ct1615 - It has been for about two years now.

 

[jsc]

Hey, Johnny. Welcome back. Haven't seen you in awhile. At our age, I was starting to get worried.